From c6dcb72405b10b569cbfadd5e3a769c7ce1bcd20 Mon Sep 17 00:00:00 2001
From: "ken.lj" <ken.lj.hz@gmail.com>
Date: Tue, 26 Dec 2017 11:11:35 +0800
Subject: [PATCH] I18N effort for dubbo-cluster, #1114

---
 dubbo-cluster/pom.xml                         |  17 ++-
 .../alibaba/dubbo/rpc/cluster/Cluster.java    |  18 +--
 .../dubbo/rpc/cluster/Configurator.java       |  18 +--
 .../rpc/cluster/ConfiguratorFactory.java      |  18 +--
 .../alibaba/dubbo/rpc/cluster/Directory.java  |  18 +--
 .../dubbo/rpc/cluster/LoadBalance.java        |  19 ++-
 .../com/alibaba/dubbo/rpc/cluster/Merger.java |  18 +--
 .../com/alibaba/dubbo/rpc/cluster/Router.java |  18 +--
 .../dubbo/rpc/cluster/RouterFactory.java      |  18 +--
 .../dubbo/rpc/cluster/RuleConverter.java      |  14 +-
 .../configurator/AbstractConfigurator.java    |  18 +--
 .../absent/AbsentConfigurator.java            |  18 +--
 .../absent/AbsentConfiguratorFactory.java     |  18 +--
 .../override/OverrideConfigurator.java        |  18 +--
 .../override/OverrideConfiguratorFactory.java |  18 +--
 .../cluster/directory/AbstractDirectory.java  |  22 +--
 .../cluster/directory/StaticDirectory.java    |  18 +--
 .../loadbalance/AbstractLoadBalance.java      |  18 +--
 .../ConsistentHashLoadBalance.java            |  18 +--
 .../loadbalance/LeastActiveLoadBalance.java   |  66 ++++-----
 .../loadbalance/RandomLoadBalance.java        |  35 +++--
 .../loadbalance/RoundRobinLoadBalance.java    |  33 ++---
 .../dubbo/rpc/cluster/merger/ArrayMerger.java |  19 +--
 .../cluster/merger/BooleanArrayMerger.java    |  28 ++--
 .../rpc/cluster/merger/ByteArrayMerger.java   |  29 ++--
 .../rpc/cluster/merger/CharArrayMerger.java   |  29 ++--
 .../rpc/cluster/merger/DoubleArrayMerger.java |  29 ++--
 .../rpc/cluster/merger/FloatArrayMerger.java  |  29 ++--
 .../rpc/cluster/merger/IntArrayMerger.java    |  29 ++--
 .../dubbo/rpc/cluster/merger/ListMerger.java  |  29 ++--
 .../rpc/cluster/merger/LongArrayMerger.java   |  29 ++--
 .../dubbo/rpc/cluster/merger/MapMerger.java   |  19 +--
 .../rpc/cluster/merger/MergerFactory.java     |  25 ++--
 .../dubbo/rpc/cluster/merger/SetMerger.java   |  18 +--
 .../rpc/cluster/merger/ShortArrayMerger.java  |  29 ++--
 .../cluster/router/MockInvokersSelector.java  |  21 +--
 .../router/condition/ConditionRouter.java     |  38 ++---
 .../condition/ConditionRouterFactory.java     |  18 +--
 .../router/file/FileRouterFactory.java        |  23 +--
 .../cluster/router/script/ScriptRouter.java   |  18 +--
 .../router/script/ScriptRouterFactory.java    |  22 +--
 .../support/AbstractClusterInvoker.java       |  61 ++++----
 .../rpc/cluster/support/AvailableCluster.java |  18 +--
 .../support/AvailableClusterInvoker.java      |  18 +--
 .../rpc/cluster/support/BroadcastCluster.java |  18 +--
 .../support/BroadcastClusterInvoker.java      |  18 +--
 .../rpc/cluster/support/ClusterUtils.java     |  26 ++--
 .../rpc/cluster/support/FailbackCluster.java  |  22 ++-
 .../support/FailbackClusterInvoker.java       |  23 +--
 .../rpc/cluster/support/FailfastCluster.java  |  22 ++-
 .../support/FailfastClusterInvoker.java       |  24 +--
 .../rpc/cluster/support/FailoverCluster.java  |  22 ++-
 .../support/FailoverClusterInvoker.java       |  28 ++--
 .../rpc/cluster/support/FailsafeCluster.java  |  22 ++-
 .../support/FailsafeClusterInvoker.java       |  23 +--
 .../rpc/cluster/support/ForkingCluster.java   |  22 ++-
 .../support/ForkingClusterInvoker.java        |  26 ++--
 .../rpc/cluster/support/MergeableCluster.java |  18 +--
 .../support/MergeableClusterInvoker.java      |  20 +--
 .../support/wrapper/MockClusterInvoker.java   |  30 ++--
 .../support/wrapper/MockClusterWrapper.java   |  18 +--
 .../alibaba/dubbo/rpc/cluster/StickyTest.java |  19 +--
 .../absent/AbsentConfiguratorTest.java        |  18 +--
 .../override/OverrideConfiguratorTest.java    |  18 +--
 .../dubbo/rpc/cluster/filter/DemoService.java |  17 ++-
 .../rpc/cluster/filter/DemoServiceLocal.java  |  17 ++-
 .../rpc/cluster/filter/DemoServiceMock.java   |  18 +--
 .../rpc/cluster/filter/DemoServiceStub.java   |  17 ++-
 .../dubbo/rpc/cluster/filter/MockService.java |  18 +--
 .../cluster/loadbalance/LoadBalanceTest.java  |  18 +--
 .../rpc/cluster/merger/ResultMergerTest.java  |  18 +--
 .../dubbo/rpc/cluster/router/MockInvoker.java |  17 ++-
 .../router/condition/ConditionRouterTest.java |  27 ++--
 .../router/file/FileRouterEngineTest.java     |  18 +--
 .../router/script/ScriptRouterTest.java       |  17 ++-
 .../support/AbstractClusterInvokerTest.java   |  44 +++---
 .../rpc/cluster/support/ClusterUtilsTest.java |  14 +-
 .../support/FailSafeClusterInvokerTest.java   |  18 +--
 .../support/FailbackClusterInvokerTest.java   |  18 +--
 .../support/FailfastClusterInvokerTest.java   |  18 +--
 .../support/FailoverClusterInvokerTest.java   |  23 +--
 .../support/ForkingClusterInvokerTest.java    |  18 +--
 .../dubbo/rpc/cluster/support/Menu.java       |  18 +--
 .../rpc/cluster/support/MenuService.java      |  18 +--
 .../support/MergeableClusterInvokerTest.java  |  18 +--
 .../wrapper/MockClusterInvokerTest.java       | 139 ++++++++++--------
 .../support/wrapper/MyMockException.java      |  16 ++
 dubbo-cluster/src/test/resources/log4j.xml    |  17 ++-
 88 files changed, 1056 insertions(+), 1016 deletions(-)

diff --git a/dubbo-cluster/pom.xml b/dubbo-cluster/pom.xml
index f12ea5b01e..ecc85155f2 100644
--- a/dubbo-cluster/pom.xml
+++ b/dubbo-cluster/pom.xml
@@ -1,12 +1,13 @@
 <!--
- - Copyright 1999-2011 Alibaba Group.
- -  
- - Licensed under the Apache License, Version 2.0 (the "License");
- - you may not use this file except in compliance with the License.
- - You may obtain a copy of the License at
- -  
- -      http://www.apache.org/licenses/LICENSE-2.0
- -  
+ - Licensed to the Apache Software Foundation (ASF) under one or more
+ - contributor license agreements.  See the NOTICE file distributed with
+ - this work for additional information regarding copyright ownership.
+ - The ASF licenses this file to You under the Apache License, Version 2.0
+ - (the "License"); you may not use this file except in compliance with
+ - the License.  You may obtain a copy of the License at
+ -
+ -     http://www.apache.org/licenses/LICENSE-2.0
+ -
  - Unless required by applicable law or agreed to in writing, software
  - distributed under the License is distributed on an "AS IS" BASIS,
  - WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
diff --git a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/Cluster.java b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/Cluster.java
index 237ffe85bd..b2ab3a5b94 100644
--- a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/Cluster.java
+++ b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/Cluster.java
@@ -1,12 +1,13 @@
 /*
- * Copyright 1999-2011 Alibaba Group.
- *  
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *  
- *      http://www.apache.org/licenses/LICENSE-2.0
- *  
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -27,7 +28,6 @@ import com.alibaba.dubbo.rpc.cluster.support.FailoverCluster;
  * <a href="http://en.wikipedia.org/wiki/Computer_cluster">Cluster</a>
  * <a href="http://en.wikipedia.org/wiki/Fault-tolerant_system">Fault-Tolerant</a>
  *
- * @author william.liangf
  */
 @SPI(FailoverCluster.NAME)
 public interface Cluster {
diff --git a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/Configurator.java b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/Configurator.java
index 68f0d783a3..132e86caec 100644
--- a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/Configurator.java
+++ b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/Configurator.java
@@ -1,12 +1,13 @@
 /*
- * Copyright 1999-2012 Alibaba Group.
- *  
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *  
- *      http://www.apache.org/licenses/LICENSE-2.0
- *  
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -20,7 +21,6 @@ import com.alibaba.dubbo.common.URL;
 /**
  * Configurator. (SPI, Prototype, ThreadSafe)
  *
- * @author william.liangf
  */
 public interface Configurator extends Comparable<Configurator> {
 
diff --git a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/ConfiguratorFactory.java b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/ConfiguratorFactory.java
index a3796e82ab..6997a1713b 100644
--- a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/ConfiguratorFactory.java
+++ b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/ConfiguratorFactory.java
@@ -1,12 +1,13 @@
 /*
- * Copyright 1999-2012 Alibaba Group.
- *  
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *  
- *      http://www.apache.org/licenses/LICENSE-2.0
- *  
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -22,7 +23,6 @@ import com.alibaba.dubbo.common.extension.SPI;
 /**
  * ConfiguratorFactory. (SPI, Singleton, ThreadSafe)
  *
- * @author william.liangf
  */
 @SPI
 public interface ConfiguratorFactory {
diff --git a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/Directory.java b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/Directory.java
index a0c3a26fc5..97957145a6 100644
--- a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/Directory.java
+++ b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/Directory.java
@@ -1,12 +1,13 @@
 /*
- * Copyright 1999-2011 Alibaba Group.
- *  
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *  
- *      http://www.apache.org/licenses/LICENSE-2.0
- *  
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -27,7 +28,6 @@ import java.util.List;
  * <p>
  * <a href="http://en.wikipedia.org/wiki/Directory_service">Directory Service</a>
  *
- * @author william.liangf
  * @see com.alibaba.dubbo.rpc.cluster.Cluster#join(Directory)
  */
 public interface Directory<T> extends Node {
diff --git a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/LoadBalance.java b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/LoadBalance.java
index 3a166ba351..120ba428c6 100644
--- a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/LoadBalance.java
+++ b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/LoadBalance.java
@@ -1,12 +1,13 @@
 /*
- * Copyright 1999-2011 Alibaba Group.
- *  
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *  
- *      http://www.apache.org/licenses/LICENSE-2.0
- *  
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -30,8 +31,6 @@ import java.util.List;
  * <p>
  * <a href="http://en.wikipedia.org/wiki/Load_balancing_(computing)">Load-Balancing</a>
  *
- * @author qian.lei
- * @author william.liangf
  * @see com.alibaba.dubbo.rpc.cluster.Cluster#join(Directory)
  */
 @SPI(RandomLoadBalance.NAME)
diff --git a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/Merger.java b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/Merger.java
index 2009f9e5c2..62db3335c1 100644
--- a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/Merger.java
+++ b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/Merger.java
@@ -1,12 +1,13 @@
 /*
- * Copyright 1999-2011 Alibaba Group.
- *  
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *  
- *      http://www.apache.org/licenses/LICENSE-2.0
- *  
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -18,7 +19,6 @@ package com.alibaba.dubbo.rpc.cluster;
 import com.alibaba.dubbo.common.extension.SPI;
 
 /**
- * @author <a href="mailto:gang.lvg@alibaba-inc.com">kimi</a>
  */
 @SPI
 public interface Merger<T> {
diff --git a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/Router.java b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/Router.java
index 1a11aecafe..a5eea1c9bf 100644
--- a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/Router.java
+++ b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/Router.java
@@ -1,12 +1,13 @@
 /*
- * Copyright 1999-2011 Alibaba Group.
- *  
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *  
- *      http://www.apache.org/licenses/LICENSE-2.0
- *  
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -27,7 +28,6 @@ import java.util.List;
  * <p>
  * <a href="http://en.wikipedia.org/wiki/Routing">Routing</a>
  *
- * @author chao.liuc
  * @see com.alibaba.dubbo.rpc.cluster.Cluster#join(Directory)
  * @see com.alibaba.dubbo.rpc.cluster.Directory#list(Invocation)
  */
diff --git a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/RouterFactory.java b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/RouterFactory.java
index 61501f9aee..35e57a73fa 100644
--- a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/RouterFactory.java
+++ b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/RouterFactory.java
@@ -1,12 +1,13 @@
 /*
- * Copyright 1999-2011 Alibaba Group.
- *  
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *  
- *      http://www.apache.org/licenses/LICENSE-2.0
- *  
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -25,7 +26,6 @@ import com.alibaba.dubbo.rpc.Invocation;
  * <p>
  * <a href="http://en.wikipedia.org/wiki/Routing">Routing</a>
  *
- * @author chao.liuc
  * @see com.alibaba.dubbo.rpc.cluster.Cluster#join(Directory)
  * @see com.alibaba.dubbo.rpc.cluster.Directory#list(Invocation)
  */
diff --git a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/RuleConverter.java b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/RuleConverter.java
index 8864faa334..e8ca4f9037 100644
--- a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/RuleConverter.java
+++ b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/RuleConverter.java
@@ -1,11 +1,12 @@
 /*
- * Copyright 1999-2012 Alibaba Group.
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
  *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
+ *     http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
@@ -22,7 +23,6 @@ import com.alibaba.dubbo.common.extension.SPI;
 import java.util.List;
 
 /**
- * @author <a href="mailto:gang.lvg@alibaba-inc.com">kimi</a>
  */
 @SPI
 public interface RuleConverter {
diff --git a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/configurator/AbstractConfigurator.java b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/configurator/AbstractConfigurator.java
index 7ceae33d93..604252e2d8 100644
--- a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/configurator/AbstractConfigurator.java
+++ b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/configurator/AbstractConfigurator.java
@@ -1,12 +1,13 @@
 /*
- * Copyright 1999-2012 Alibaba Group.
- *  
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *  
- *      http://www.apache.org/licenses/LICENSE-2.0
- *  
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -27,7 +28,6 @@ import java.util.Set;
 /**
  * AbstractOverrideConfigurator
  *
- * @author william.liangf
  */
 public abstract class AbstractConfigurator implements Configurator {
 
diff --git a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/configurator/absent/AbsentConfigurator.java b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/configurator/absent/AbsentConfigurator.java
index 7b14b812e5..1a62a969af 100644
--- a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/configurator/absent/AbsentConfigurator.java
+++ b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/configurator/absent/AbsentConfigurator.java
@@ -1,12 +1,13 @@
 /*
- * Copyright 1999-2012 Alibaba Group.
- *  
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *  
- *      http://www.apache.org/licenses/LICENSE-2.0
- *  
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -21,7 +22,6 @@ import com.alibaba.dubbo.rpc.cluster.configurator.AbstractConfigurator;
 /**
  * AbsentConfigurator
  *
- * @author william.liangf
  */
 public class AbsentConfigurator extends AbstractConfigurator {
 
diff --git a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/configurator/absent/AbsentConfiguratorFactory.java b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/configurator/absent/AbsentConfiguratorFactory.java
index 99cf9028cd..fe3fa6e840 100644
--- a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/configurator/absent/AbsentConfiguratorFactory.java
+++ b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/configurator/absent/AbsentConfiguratorFactory.java
@@ -1,12 +1,13 @@
 /*
- * Copyright 1999-2012 Alibaba Group.
- *  
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *  
- *      http://www.apache.org/licenses/LICENSE-2.0
- *  
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -22,7 +23,6 @@ import com.alibaba.dubbo.rpc.cluster.ConfiguratorFactory;
 /**
  * AbsentConfiguratorFactory
  *
- * @author william.liangf
  */
 public class AbsentConfiguratorFactory implements ConfiguratorFactory {
 
diff --git a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/configurator/override/OverrideConfigurator.java b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/configurator/override/OverrideConfigurator.java
index 97dbe28e28..5286bfaa0c 100644
--- a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/configurator/override/OverrideConfigurator.java
+++ b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/configurator/override/OverrideConfigurator.java
@@ -1,12 +1,13 @@
 /*
- * Copyright 1999-2012 Alibaba Group.
- *  
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *  
- *      http://www.apache.org/licenses/LICENSE-2.0
- *  
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -21,7 +22,6 @@ import com.alibaba.dubbo.rpc.cluster.configurator.AbstractConfigurator;
 /**
  * AbsentConfigurator
  *
- * @author william.liangf
  */
 public class OverrideConfigurator extends AbstractConfigurator {
 
diff --git a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/configurator/override/OverrideConfiguratorFactory.java b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/configurator/override/OverrideConfiguratorFactory.java
index 4da0f494ea..75b3e056f7 100644
--- a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/configurator/override/OverrideConfiguratorFactory.java
+++ b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/configurator/override/OverrideConfiguratorFactory.java
@@ -1,12 +1,13 @@
 /*
- * Copyright 1999-2012 Alibaba Group.
- *  
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *  
- *      http://www.apache.org/licenses/LICENSE-2.0
- *  
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -22,7 +23,6 @@ import com.alibaba.dubbo.rpc.cluster.ConfiguratorFactory;
 /**
  * AbsentConfiguratorFactory
  *
- * @author william.liangf
  */
 public class OverrideConfiguratorFactory implements ConfiguratorFactory {
 
diff --git a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/directory/AbstractDirectory.java b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/directory/AbstractDirectory.java
index 84b46b2a4e..f4b8aa956b 100644
--- a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/directory/AbstractDirectory.java
+++ b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/directory/AbstractDirectory.java
@@ -1,12 +1,13 @@
 /*
- * Copyright 1999-2011 Alibaba Group.
- *  
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *  
- *      http://www.apache.org/licenses/LICENSE-2.0
- *  
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -33,13 +34,12 @@ import java.util.Collections;
 import java.util.List;
 
 /**
- * 增加router的Directory
+ * Abstract implementation of Directory: Invoker list returned from this Directory's list method have been filtered by Routers
  *
- * @author chao.liuc
  */
 public abstract class AbstractDirectory<T> implements Directory<T> {
 
-    // 日志输出
+    // logger
     private static final Logger logger = LoggerFactory.getLogger(AbstractDirectory.class);
 
     private final URL url;
diff --git a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/directory/StaticDirectory.java b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/directory/StaticDirectory.java
index 05dbbbf80e..1d183a4ad7 100644
--- a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/directory/StaticDirectory.java
+++ b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/directory/StaticDirectory.java
@@ -1,12 +1,13 @@
 /*
- * Copyright 1999-2011 Alibaba Group.
- *  
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *  
- *      http://www.apache.org/licenses/LICENSE-2.0
- *  
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -26,7 +27,6 @@ import java.util.List;
 /**
  * StaticDirectory
  *
- * @author william.liangf
  */
 public class StaticDirectory<T> extends AbstractDirectory<T> {
 
diff --git a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/loadbalance/AbstractLoadBalance.java b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/loadbalance/AbstractLoadBalance.java
index 84c579b14e..776b3f6478 100644
--- a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/loadbalance/AbstractLoadBalance.java
+++ b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/loadbalance/AbstractLoadBalance.java
@@ -1,12 +1,13 @@
 /*
- * Copyright 1999-2011 Alibaba Group.
- *  
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *  
- *      http://www.apache.org/licenses/LICENSE-2.0
- *  
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -26,7 +27,6 @@ import java.util.List;
 /**
  * AbstractLoadBalance
  *
- * @author william.liangf
  */
 public abstract class AbstractLoadBalance implements LoadBalance {
 
diff --git a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/loadbalance/ConsistentHashLoadBalance.java b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/loadbalance/ConsistentHashLoadBalance.java
index 6dc75efa19..a080e62139 100644
--- a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/loadbalance/ConsistentHashLoadBalance.java
+++ b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/loadbalance/ConsistentHashLoadBalance.java
@@ -1,12 +1,13 @@
 /*
- * Copyright 1999-2012 Alibaba Group.
- *  
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *  
- *      http://www.apache.org/licenses/LICENSE-2.0
- *  
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -32,7 +33,6 @@ import java.util.concurrent.ConcurrentMap;
 /**
  * ConsistentHashLoadBalance
  *
- * @author william.liangf
  */
 public class ConsistentHashLoadBalance extends AbstractLoadBalance {
 
diff --git a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/loadbalance/LeastActiveLoadBalance.java b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/loadbalance/LeastActiveLoadBalance.java
index e1de6f4da7..0da2254ca6 100644
--- a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/loadbalance/LeastActiveLoadBalance.java
+++ b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/loadbalance/LeastActiveLoadBalance.java
@@ -1,12 +1,13 @@
 /*
- * Copyright 1999-2011 Alibaba Group.
- *  
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *  
- *      http://www.apache.org/licenses/LICENSE-2.0
- *  
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -27,7 +28,6 @@ import java.util.Random;
 /**
  * LeastActiveLoadBalance
  *
- * @author william.liangf
  */
 public class LeastActiveLoadBalance extends AbstractLoadBalance {
 
@@ -36,28 +36,28 @@ public class LeastActiveLoadBalance extends AbstractLoadBalance {
     private final Random random = new Random();
 
     protected <T> Invoker<T> doSelect(List<Invoker<T>> invokers, URL url, Invocation invocation) {
-        int length = invokers.size(); // 总个数
-        int leastActive = -1; // 最小的活跃数
-        int leastCount = 0; // 相同最小活跃数的个数
-        int[] leastIndexs = new int[length]; // 相同最小活跃数的下标
-        int totalWeight = 0; // 总权重
-        int firstWeight = 0; // 第一个权重，用于于计算是否相同
-        boolean sameWeight = true; // 是否所有权重相同
+        int length = invokers.size(); // Number of invokers
+        int leastActive = -1; // The least active value of all invokers
+        int leastCount = 0; // The number of invokers having the same least active value (leastActive)
+        int[] leastIndexs = new int[length]; // The index of invokers having the same least active value (leastActive)
+        int totalWeight = 0; // The sum of weights
+        int firstWeight = 0; // Initial value, used for comparision
+        boolean sameWeight = true; // Every invoker has the same weight value?
         for (int i = 0; i < length; i++) {
             Invoker<T> invoker = invokers.get(i);
-            int active = RpcStatus.getStatus(invoker.getUrl(), invocation.getMethodName()).getActive(); // 活跃数
-            int weight = invoker.getUrl().getMethodParameter(invocation.getMethodName(), Constants.WEIGHT_KEY, Constants.DEFAULT_WEIGHT); // 权重
-            if (leastActive == -1 || active < leastActive) { // 发现更小的活跃数，重新开始
-                leastActive = active; // 记录最小活跃数
-                leastCount = 1; // 重新统计相同最小活跃数的个数
-                leastIndexs[0] = i; // 重新记录最小活跃数下标
-                totalWeight = weight; // 重新累计总权重
-                firstWeight = weight; // 记录第一个权重
-                sameWeight = true; // 还原权重相同标识
-            } else if (active == leastActive) { // 累计相同最小的活跃数
-                leastIndexs[leastCount++] = i; // 累计相同最小活跃数下标
-                totalWeight += weight; // 累计总权重
-                // 判断所有权重是否一样
+            int active = RpcStatus.getStatus(invoker.getUrl(), invocation.getMethodName()).getActive(); // Active number
+            int weight = invoker.getUrl().getMethodParameter(invocation.getMethodName(), Constants.WEIGHT_KEY, Constants.DEFAULT_WEIGHT); // Weight
+            if (leastActive == -1 || active < leastActive) { // Restart, when find a invoker having smaller least active value.
+                leastActive = active; // Record the current least active value
+                leastCount = 1; // Reset leastCount, count again based on current leastCount
+                leastIndexs[0] = i; // Reset
+                totalWeight = weight; // Reset
+                firstWeight = weight; // Record the weight the first invoker
+                sameWeight = true; // Reset, every invoker has the same weight value?
+            } else if (active == leastActive) { // If current invoker's active value equals with leaseActive, then accumulating.
+                leastIndexs[leastCount++] = i; // Record index number of this invoker
+                totalWeight += weight; // Add this invoker's weight to totalWeight.
+                // If every invoker has the same weight?
                 if (sameWeight && i > 0
                         && weight != firstWeight) {
                     sameWeight = false;
@@ -66,13 +66,13 @@ public class LeastActiveLoadBalance extends AbstractLoadBalance {
         }
         // assert(leastCount > 0)
         if (leastCount == 1) {
-            // 如果只有一个最小则直接返回
+            // If we got exactly one invoker having the least active value, return this invoker directly.
             return invokers.get(leastIndexs[0]);
         }
         if (!sameWeight && totalWeight > 0) {
-            // 如果权重不相同且权重大于0则按总权重数随机
+            // If (not every invoker has the same weight & at least one invoker's weight>0), select randomly based on totalWeight.
             int offsetWeight = random.nextInt(totalWeight);
-            // 并确定随机值落在哪个片断上
+            // Return a invoker based on the random value.
             for (int i = 0; i < leastCount; i++) {
                 int leastIndex = leastIndexs[i];
                 offsetWeight -= getWeight(invokers.get(leastIndex), invocation);
@@ -80,7 +80,7 @@ public class LeastActiveLoadBalance extends AbstractLoadBalance {
                     return invokers.get(leastIndex);
             }
         }
-        // 如果权重相同或权重为0则均等随机
+        // If all invokers have the same weight value or totalWeight=0, return evenly.
         return invokers.get(leastIndexs[random.nextInt(leastCount)]);
     }
 }
\ No newline at end of file
diff --git a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/loadbalance/RandomLoadBalance.java b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/loadbalance/RandomLoadBalance.java
index aa524e9579..933428ba03 100644
--- a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/loadbalance/RandomLoadBalance.java
+++ b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/loadbalance/RandomLoadBalance.java
@@ -1,12 +1,13 @@
 /*
- * Copyright 1999-2011 Alibaba Group.
- *  
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *  
- *      http://www.apache.org/licenses/LICENSE-2.0
- *  
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -25,8 +26,6 @@ import java.util.Random;
 /**
  * random load balance.
  *
- * @author qianlei
- * @author william.liangf
  */
 public class RandomLoadBalance extends AbstractLoadBalance {
 
@@ -35,21 +34,21 @@ public class RandomLoadBalance extends AbstractLoadBalance {
     private final Random random = new Random();
 
     protected <T> Invoker<T> doSelect(List<Invoker<T>> invokers, URL url, Invocation invocation) {
-        int length = invokers.size(); // 总个数
-        int totalWeight = 0; // 总权重
-        boolean sameWeight = true; // 权重是否都一样
+        int length = invokers.size(); // Number of invokers
+        int totalWeight = 0; // The sum of weights
+        boolean sameWeight = true; // Every invoker has the same weight?
         for (int i = 0; i < length; i++) {
             int weight = getWeight(invokers.get(i), invocation);
-            totalWeight += weight; // 累计总权重
+            totalWeight += weight; // Sum
             if (sameWeight && i > 0
                     && weight != getWeight(invokers.get(i - 1), invocation)) {
-                sameWeight = false; // 计算所有权重是否一样
+                sameWeight = false;
             }
         }
         if (totalWeight > 0 && !sameWeight) {
-            // 如果权重不相同且权重大于0则按总权重数随机
+            // If (not every invoker has the same weight & at least one invoker's weight>0), select randomly based on totalWeight.
             int offset = random.nextInt(totalWeight);
-            // 并确定随机值落在哪个片断上
+            // Return a invoker based on the random value.
             for (int i = 0; i < length; i++) {
                 offset -= getWeight(invokers.get(i), invocation);
                 if (offset < 0) {
@@ -57,7 +56,7 @@ public class RandomLoadBalance extends AbstractLoadBalance {
                 }
             }
         }
-        // 如果权重相同或权重为0则均等随机
+        // If all invokers have the same weight value or totalWeight=0, return evenly.
         return invokers.get(random.nextInt(length));
     }
 
diff --git a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/loadbalance/RoundRobinLoadBalance.java b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/loadbalance/RoundRobinLoadBalance.java
index b9648ca8b2..1eccbf47c4 100644
--- a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/loadbalance/RoundRobinLoadBalance.java
+++ b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/loadbalance/RoundRobinLoadBalance.java
@@ -1,12 +1,13 @@
 /*
- * Copyright 1999-2011 Alibaba Group.
- *  
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *  
- *      http://www.apache.org/licenses/LICENSE-2.0
- *  
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -29,8 +30,6 @@ import java.util.concurrent.ConcurrentMap;
 /**
  * Round robin load balance.
  *
- * @author qian.lei
- * @author william.liangf
  */
 public class RoundRobinLoadBalance extends AbstractLoadBalance {
 
@@ -40,15 +39,15 @@ public class RoundRobinLoadBalance extends AbstractLoadBalance {
 
     protected <T> Invoker<T> doSelect(List<Invoker<T>> invokers, URL url, Invocation invocation) {
         String key = invokers.get(0).getUrl().getServiceKey() + "." + invocation.getMethodName();
-        int length = invokers.size(); // 总个数
-        int maxWeight = 0; // 最大权重
-        int minWeight = Integer.MAX_VALUE; // 最小权重
+        int length = invokers.size(); // Number of invokers
+        int maxWeight = 0; // The maximum weight
+        int minWeight = Integer.MAX_VALUE; // The minimum weight
         final LinkedHashMap<Invoker<T>, IntegerWrapper> invokerToWeightMap = new LinkedHashMap<Invoker<T>, IntegerWrapper>();
         int weightSum = 0;
         for (int i = 0; i < length; i++) {
             int weight = getWeight(invokers.get(i), invocation);
-            maxWeight = Math.max(maxWeight, weight); // 累计最大权重
-            minWeight = Math.min(minWeight, weight); // 累计最小权重
+            maxWeight = Math.max(maxWeight, weight); // Choose the maximum weight
+            minWeight = Math.min(minWeight, weight); // Choose the minimum weight
             if (weight > 0) {
                 invokerToWeightMap.put(invokers.get(i), new IntegerWrapper(weight));
                 weightSum += weight;
@@ -60,7 +59,7 @@ public class RoundRobinLoadBalance extends AbstractLoadBalance {
             sequence = sequences.get(key);
         }
         int currentSequence = sequence.getAndIncrement();
-        if (maxWeight > 0 && minWeight < maxWeight) { // 权重不一样
+        if (maxWeight > 0 && minWeight < maxWeight) {
             int mod = currentSequence % weightSum;
             for (int i = 0; i < maxWeight; i++) {
                 for (Map.Entry<Invoker<T>, IntegerWrapper> each : invokerToWeightMap.entrySet()) {
@@ -76,7 +75,7 @@ public class RoundRobinLoadBalance extends AbstractLoadBalance {
                 }
             }
         }
-        // 取模轮循
+        // Round robin
         return invokers.get(currentSequence % length);
     }
 
diff --git a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/merger/ArrayMerger.java b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/merger/ArrayMerger.java
index 4d67b90770..ef9a8c4833 100644
--- a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/merger/ArrayMerger.java
+++ b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/merger/ArrayMerger.java
@@ -1,12 +1,13 @@
 /*
- * Copyright 1999-2011 Alibaba Group.
- *  
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *  
- *      http://www.apache.org/licenses/LICENSE-2.0
- *  
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -20,7 +21,7 @@ import com.alibaba.dubbo.rpc.cluster.Merger;
 import java.lang.reflect.Array;
 
 /**
- * @author <a href="mailto:gang.lvg@alibaba-inc.com">kimi</a>
+ *
  */
 public class ArrayMerger implements Merger<Object[]> {
 
diff --git a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/merger/BooleanArrayMerger.java b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/merger/BooleanArrayMerger.java
index 5a747dd5eb..15563c6ca8 100644
--- a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/merger/BooleanArrayMerger.java
+++ b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/merger/BooleanArrayMerger.java
@@ -1,17 +1,18 @@
 /*
- * Copyright 1999-2012 Alibaba Group.
- *    
- *   Licensed under the Apache License, Version 2.0 (the "License");
- *   you may not use this file except in compliance with the License.
- *   You may obtain a copy of the License at
- *    
- *        http://www.apache.org/licenses/LICENSE-2.0
- *    
- *   Unless required by applicable law or agreed to in writing, software
- *   distributed under the License is distributed on an "AS IS" BASIS,
- *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *   See the License for the specific language governing permissions and
- *   limitations under the License.
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
  */
 
 package com.alibaba.dubbo.rpc.cluster.merger;
@@ -19,7 +20,6 @@ package com.alibaba.dubbo.rpc.cluster.merger;
 import com.alibaba.dubbo.rpc.cluster.Merger;
 
 /**
- * @author <a href="mailto:gang.lvg@alibaba-inc.com">kimi</a>
  */
 public class BooleanArrayMerger implements Merger<boolean[]> {
 
diff --git a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/merger/ByteArrayMerger.java b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/merger/ByteArrayMerger.java
index b0d02c1791..7e52d018fb 100644
--- a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/merger/ByteArrayMerger.java
+++ b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/merger/ByteArrayMerger.java
@@ -1,17 +1,18 @@
 /*
- * Copyright 1999-2012 Alibaba Group.
- *    
- *   Licensed under the Apache License, Version 2.0 (the "License");
- *   you may not use this file except in compliance with the License.
- *   You may obtain a copy of the License at
- *    
- *        http://www.apache.org/licenses/LICENSE-2.0
- *    
- *   Unless required by applicable law or agreed to in writing, software
- *   distributed under the License is distributed on an "AS IS" BASIS,
- *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *   See the License for the specific language governing permissions and
- *   limitations under the License.
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
  */
 
 package com.alibaba.dubbo.rpc.cluster.merger;
@@ -19,7 +20,7 @@ package com.alibaba.dubbo.rpc.cluster.merger;
 import com.alibaba.dubbo.rpc.cluster.Merger;
 
 /**
- * @author <a href="mailto:gang.lvg@alibaba-inc.com">kimi</a>
+ *
  */
 public class ByteArrayMerger implements Merger<byte[]> {
 
diff --git a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/merger/CharArrayMerger.java b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/merger/CharArrayMerger.java
index 0410bd2593..e30149cbb8 100644
--- a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/merger/CharArrayMerger.java
+++ b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/merger/CharArrayMerger.java
@@ -1,17 +1,18 @@
 /*
- * Copyright 1999-2012 Alibaba Group.
- *    
- *   Licensed under the Apache License, Version 2.0 (the "License");
- *   you may not use this file except in compliance with the License.
- *   You may obtain a copy of the License at
- *    
- *        http://www.apache.org/licenses/LICENSE-2.0
- *    
- *   Unless required by applicable law or agreed to in writing, software
- *   distributed under the License is distributed on an "AS IS" BASIS,
- *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *   See the License for the specific language governing permissions and
- *   limitations under the License.
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
  */
 
 package com.alibaba.dubbo.rpc.cluster.merger;
@@ -19,7 +20,7 @@ package com.alibaba.dubbo.rpc.cluster.merger;
 import com.alibaba.dubbo.rpc.cluster.Merger;
 
 /**
- * @author <a href="mailto:gang.lvg@alibaba-inc.com">kimi</a>
+ *
  */
 public class CharArrayMerger implements Merger<char[]> {
 
diff --git a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/merger/DoubleArrayMerger.java b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/merger/DoubleArrayMerger.java
index 1c6991768b..a2801ae017 100644
--- a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/merger/DoubleArrayMerger.java
+++ b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/merger/DoubleArrayMerger.java
@@ -1,17 +1,18 @@
 /*
- * Copyright 1999-2012 Alibaba Group.
- *    
- *   Licensed under the Apache License, Version 2.0 (the "License");
- *   you may not use this file except in compliance with the License.
- *   You may obtain a copy of the License at
- *    
- *        http://www.apache.org/licenses/LICENSE-2.0
- *    
- *   Unless required by applicable law or agreed to in writing, software
- *   distributed under the License is distributed on an "AS IS" BASIS,
- *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *   See the License for the specific language governing permissions and
- *   limitations under the License.
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
  */
 
 package com.alibaba.dubbo.rpc.cluster.merger;
@@ -19,7 +20,7 @@ package com.alibaba.dubbo.rpc.cluster.merger;
 import com.alibaba.dubbo.rpc.cluster.Merger;
 
 /**
- * @author <a href="mailto:gang.lvg@alibaba-inc.com">kimi</a>
+ *
  */
 public class DoubleArrayMerger implements Merger<double[]> {
 
diff --git a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/merger/FloatArrayMerger.java b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/merger/FloatArrayMerger.java
index 18eeabbd46..5c918ded92 100644
--- a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/merger/FloatArrayMerger.java
+++ b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/merger/FloatArrayMerger.java
@@ -1,17 +1,18 @@
 /*
- * Copyright 1999-2012 Alibaba Group.
- *    
- *   Licensed under the Apache License, Version 2.0 (the "License");
- *   you may not use this file except in compliance with the License.
- *   You may obtain a copy of the License at
- *    
- *        http://www.apache.org/licenses/LICENSE-2.0
- *    
- *   Unless required by applicable law or agreed to in writing, software
- *   distributed under the License is distributed on an "AS IS" BASIS,
- *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *   See the License for the specific language governing permissions and
- *   limitations under the License.
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
  */
 
 package com.alibaba.dubbo.rpc.cluster.merger;
@@ -19,7 +20,7 @@ package com.alibaba.dubbo.rpc.cluster.merger;
 import com.alibaba.dubbo.rpc.cluster.Merger;
 
 /**
- * @author <a href="mailto:gang.lvg@alibaba-inc.com">kimi</a>
+ *
  */
 public class FloatArrayMerger implements Merger<float[]> {
 
diff --git a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/merger/IntArrayMerger.java b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/merger/IntArrayMerger.java
index 7f2ed59794..51f5fd142d 100644
--- a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/merger/IntArrayMerger.java
+++ b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/merger/IntArrayMerger.java
@@ -1,17 +1,18 @@
 /*
- * Copyright 1999-2012 Alibaba Group.
- *    
- *   Licensed under the Apache License, Version 2.0 (the "License");
- *   you may not use this file except in compliance with the License.
- *   You may obtain a copy of the License at
- *    
- *        http://www.apache.org/licenses/LICENSE-2.0
- *    
- *   Unless required by applicable law or agreed to in writing, software
- *   distributed under the License is distributed on an "AS IS" BASIS,
- *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *   See the License for the specific language governing permissions and
- *   limitations under the License.
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
  */
 
 package com.alibaba.dubbo.rpc.cluster.merger;
@@ -19,7 +20,7 @@ package com.alibaba.dubbo.rpc.cluster.merger;
 import com.alibaba.dubbo.rpc.cluster.Merger;
 
 /**
- * @author <a href="mailto:gang.lvg@alibaba-inc.com">kimi</a>
+ *
  */
 public class IntArrayMerger implements Merger<int[]> {
 
diff --git a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/merger/ListMerger.java b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/merger/ListMerger.java
index 6e50b73b83..a496d06576 100644
--- a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/merger/ListMerger.java
+++ b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/merger/ListMerger.java
@@ -1,17 +1,18 @@
 /*
- * Copyright 1999-2012 Alibaba Group.
- *    
- *   Licensed under the Apache License, Version 2.0 (the "License");
- *   you may not use this file except in compliance with the License.
- *   You may obtain a copy of the License at
- *    
- *        http://www.apache.org/licenses/LICENSE-2.0
- *    
- *   Unless required by applicable law or agreed to in writing, software
- *   distributed under the License is distributed on an "AS IS" BASIS,
- *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *   See the License for the specific language governing permissions and
- *   limitations under the License.
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
  */
 
 package com.alibaba.dubbo.rpc.cluster.merger;
@@ -22,7 +23,7 @@ import java.util.ArrayList;
 import java.util.List;
 
 /**
- * @author <a href="mailto:gang.lvg@alibaba-inc.com">kimi</a>
+ *
  */
 public class ListMerger implements Merger<List<?>> {
 
diff --git a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/merger/LongArrayMerger.java b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/merger/LongArrayMerger.java
index 249246b928..b1ff2a42d7 100644
--- a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/merger/LongArrayMerger.java
+++ b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/merger/LongArrayMerger.java
@@ -1,17 +1,18 @@
 /*
- * Copyright 1999-2012 Alibaba Group.
- *    
- *   Licensed under the Apache License, Version 2.0 (the "License");
- *   you may not use this file except in compliance with the License.
- *   You may obtain a copy of the License at
- *    
- *        http://www.apache.org/licenses/LICENSE-2.0
- *    
- *   Unless required by applicable law or agreed to in writing, software
- *   distributed under the License is distributed on an "AS IS" BASIS,
- *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *   See the License for the specific language governing permissions and
- *   limitations under the License.
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
  */
 
 package com.alibaba.dubbo.rpc.cluster.merger;
@@ -19,7 +20,7 @@ package com.alibaba.dubbo.rpc.cluster.merger;
 import com.alibaba.dubbo.rpc.cluster.Merger;
 
 /**
- * @author <a href="mailto:gang.lvg@alibaba-inc.com">kimi</a>
+ *
  */
 public class LongArrayMerger implements Merger<long[]> {
 
diff --git a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/merger/MapMerger.java b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/merger/MapMerger.java
index 2cb7151cba..2b03de305b 100644
--- a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/merger/MapMerger.java
+++ b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/merger/MapMerger.java
@@ -1,12 +1,13 @@
 /*
- * Copyright 1999-2011 Alibaba Group.
- *  
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *  
- *      http://www.apache.org/licenses/LICENSE-2.0
- *  
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -21,7 +22,7 @@ import java.util.HashMap;
 import java.util.Map;
 
 /**
- * @author <a href="mailto:gang.lvg@alibaba-inc.com">kimi</a>
+ *
  */
 public class MapMerger implements Merger<Map<?, ?>> {
 
diff --git a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/merger/MergerFactory.java b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/merger/MergerFactory.java
index c56226f47f..171c2bbc05 100644
--- a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/merger/MergerFactory.java
+++ b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/merger/MergerFactory.java
@@ -1,17 +1,18 @@
 /*
- * Copyright 1999-2012 Alibaba Group.
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
  *
- *   Licensed under the Apache License, Version 2.0 (the "License");
- *   you may not use this file except in compliance with the License.
- *   You may obtain a copy of the License at
+ *     http://www.apache.org/licenses/LICENSE-2.0
  *
- *        http://www.apache.org/licenses/LICENSE-2.0
- *
- *   Unless required by applicable law or agreed to in writing, software
- *   distributed under the License is distributed on an "AS IS" BASIS,
- *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *   See the License for the specific language governing permissions and
- *   limitations under the License.
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
  */
 
 package com.alibaba.dubbo.rpc.cluster.merger;
@@ -25,7 +26,7 @@ import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.ConcurrentMap;
 
 /**
- * @author <a href="mailto:gang.lvg@alibaba-inc.com">kimi</a>
+ *
  */
 public class MergerFactory {
 
diff --git a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/merger/SetMerger.java b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/merger/SetMerger.java
index 5872d03bae..64d6baa385 100644
--- a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/merger/SetMerger.java
+++ b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/merger/SetMerger.java
@@ -1,18 +1,4 @@
-/*
- * Copyright 1999-2012 Alibaba Group.
- *    
- *   Licensed under the Apache License, Version 2.0 (the "License");
- *   you may not use this file except in compliance with the License.
- *   You may obtain a copy of the License at
- *    
- *        http://www.apache.org/licenses/LICENSE-2.0
- *    
- *   Unless required by applicable law or agreed to in writing, software
- *   distributed under the License is distributed on an "AS IS" BASIS,
- *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *   See the License for the specific language governing permissions and
- *   limitations under the License.
- */
+
 
 package com.alibaba.dubbo.rpc.cluster.merger;
 
@@ -22,7 +8,7 @@ import java.util.HashSet;
 import java.util.Set;
 
 /**
- * @author <a href="mailto:gang.lvg@alibaba-inc.com">kimi</a>
+ *
  */
 public class SetMerger implements Merger<Set<?>> {
 
diff --git a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/merger/ShortArrayMerger.java b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/merger/ShortArrayMerger.java
index 75a9a3e209..6e272dd9ad 100644
--- a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/merger/ShortArrayMerger.java
+++ b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/merger/ShortArrayMerger.java
@@ -1,17 +1,18 @@
 /*
- * Copyright 1999-2012 Alibaba Group.
- *    
- *   Licensed under the Apache License, Version 2.0 (the "License");
- *   you may not use this file except in compliance with the License.
- *   You may obtain a copy of the License at
- *    
- *        http://www.apache.org/licenses/LICENSE-2.0
- *    
- *   Unless required by applicable law or agreed to in writing, software
- *   distributed under the License is distributed on an "AS IS" BASIS,
- *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *   See the License for the specific language governing permissions and
- *   limitations under the License.
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
  */
 
 package com.alibaba.dubbo.rpc.cluster.merger;
@@ -19,7 +20,7 @@ package com.alibaba.dubbo.rpc.cluster.merger;
 import com.alibaba.dubbo.rpc.cluster.Merger;
 
 /**
- * @author <a href="mailto:gang.lvg@alibaba-inc.com">kimi</a>
+ *
  */
 public class ShortArrayMerger implements Merger<short[]> {
 
diff --git a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/router/MockInvokersSelector.java b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/router/MockInvokersSelector.java
index 37158b044c..9239ce635e 100644
--- a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/router/MockInvokersSelector.java
+++ b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/router/MockInvokersSelector.java
@@ -1,12 +1,13 @@
 /*
- * Copyright 1999-2011 Alibaba Group.
- *  
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *  
- *      http://www.apache.org/licenses/LICENSE-2.0
- *  
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -26,9 +27,9 @@ import java.util.ArrayList;
 import java.util.List;
 
 /**
- * mock invoker选择器
+ * A specific Router designed to realize mock feature.
+ * If a request is configured to use mock, then this router guarantees that only the invokers with protocol MOCK appear in final the invoker list, all other invokers will be excluded.
  *
- * @author chao.liuc
  */
 public class MockInvokersSelector implements Router {
 
diff --git a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/router/condition/ConditionRouter.java b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/router/condition/ConditionRouter.java
index f4f1cb052a..0e88557c99 100644
--- a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/router/condition/ConditionRouter.java
+++ b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/router/condition/ConditionRouter.java
@@ -1,12 +1,13 @@
 /*
- * Copyright 1999-2012 Alibaba Group.
- *  
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *  
- *      http://www.apache.org/licenses/LICENSE-2.0
- *  
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -40,7 +41,6 @@ import java.util.regex.Pattern;
 /**
  * ConditionRouter
  *
- * @author william.liangf
  */
 public class ConditionRouter implements Router, Comparable<Router> {
 
@@ -67,7 +67,7 @@ public class ConditionRouter implements Router, Comparable<Router> {
             String thenRule = i < 0 ? rule.trim() : rule.substring(i + 2).trim();
             Map<String, MatchPair> when = StringUtils.isBlank(whenRule) || "true".equals(whenRule) ? new HashMap<String, MatchPair>() : parseRule(whenRule);
             Map<String, MatchPair> then = StringUtils.isBlank(thenRule) || "false".equals(thenRule) ? null : parseRule(thenRule);
-            // NOTE: When条件是允许为空的，外部业务来保证类似的约束条件
+            // NOTE: It should be determined on the business level whether the `When condition` can be empty or not.
             this.whenCondition = when;
             this.thenCondition = then;
         } catch (ParseException e) {
@@ -81,20 +81,20 @@ public class ConditionRouter implements Router, Comparable<Router> {
         if (StringUtils.isBlank(rule)) {
             return condition;
         }
-        // 匹配或不匹配Key-Value对
+        // Key-Value pair, stores both match and mismatch conditions
         MatchPair pair = null;
-        // 多个Value值
+        // Multiple values
         Set<String> values = null;
         final Matcher matcher = ROUTE_PATTERN.matcher(rule);
-        while (matcher.find()) { // 逐个匹配
+        while (matcher.find()) { // Try to match one by one
             String separator = matcher.group(1);
             String content = matcher.group(2);
-            // 表达式开始
+            // Start part of the condition expression.
             if (separator == null || separator.length() == 0) {
                 pair = new MatchPair();
                 condition.put(content, pair);
             }
-            // KV开始
+            // The KV part of the condition expression
             else if ("&".equals(separator)) {
                 if (condition.get(content) == null) {
                     pair = new MatchPair();
@@ -103,7 +103,7 @@ public class ConditionRouter implements Router, Comparable<Router> {
                     pair = condition.get(content);
                 }
             }
-            // KV的Value部分开始
+            // The Value in the KV part.
             else if ("=".equals(separator)) {
                 if (pair == null)
                     throw new ParseException("Illegal route rule \""
@@ -114,7 +114,7 @@ public class ConditionRouter implements Router, Comparable<Router> {
                 values = pair.matches;
                 values.add(content);
             }
-            // KV的Value部分开始
+            // The Value in the KV part.
             else if ("!=".equals(separator)) {
                 if (pair == null)
                     throw new ParseException("Illegal route rule \""
@@ -125,8 +125,8 @@ public class ConditionRouter implements Router, Comparable<Router> {
                 values = pair.mismatches;
                 values.add(content);
             }
-            // KV的Value部分的多个条目
-            else if (",".equals(separator)) { // 如果为逗号表示
+            // The Value in the KV part, if Value have more than one items.
+            else if (",".equals(separator)) { // Should be seperateed by ','
                 if (values == null || values.size() == 0)
                     throw new ParseException("Illegal route rule \""
                             + rule + "\", The error char '" + separator
diff --git a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/router/condition/ConditionRouterFactory.java b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/router/condition/ConditionRouterFactory.java
index d2fa31f886..b34a0e1963 100644
--- a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/router/condition/ConditionRouterFactory.java
+++ b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/router/condition/ConditionRouterFactory.java
@@ -1,12 +1,13 @@
 /*
- * Copyright 1999-2012 Alibaba Group.
- *  
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *  
- *      http://www.apache.org/licenses/LICENSE-2.0
- *  
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -22,7 +23,6 @@ import com.alibaba.dubbo.rpc.cluster.RouterFactory;
 /**
  * ConditionRouterFactory
  *
- * @author william.liangf
  */
 public class ConditionRouterFactory implements RouterFactory {
 
diff --git a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/router/file/FileRouterFactory.java b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/router/file/FileRouterFactory.java
index 0f1d7c0125..d78ca0bf19 100644
--- a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/router/file/FileRouterFactory.java
+++ b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/router/file/FileRouterFactory.java
@@ -1,12 +1,13 @@
 /*
- * Copyright 1999-2011 Alibaba Group.
- *  
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *  
- *      http://www.apache.org/licenses/LICENSE-2.0
- *  
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -38,10 +39,10 @@ public class FileRouterFactory implements RouterFactory {
 
     public Router getRouter(URL url) {
         try {
-            // File URL 转换成 其它Route URL，然后Load
+            // Transform File URL into Script Route URL, and Load
             // file:///d:/path/to/route.js?router=script ==> script:///d:/path/to/route.js?type=js&rule=<file-content>
-            String protocol = url.getParameter(Constants.ROUTER_KEY, ScriptRouterFactory.NAME); // 将原类型转为协议
-            String type = null; // 使用文件后缀做为类型
+            String protocol = url.getParameter(Constants.ROUTER_KEY, ScriptRouterFactory.NAME); // Replace original protocol (maybe 'file') with 'script'
+            String type = null; // Use file suffix to config script type, e.g., js, groovy ...
             String path = url.getPath();
             if (path != null) {
                 int i = path.lastIndexOf('.');
diff --git a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/router/script/ScriptRouter.java b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/router/script/ScriptRouter.java
index df1c99656a..7359e6ce6f 100644
--- a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/router/script/ScriptRouter.java
+++ b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/router/script/ScriptRouter.java
@@ -1,12 +1,13 @@
 /*
- * Copyright 1999-2011 Alibaba Group.
- *  
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *  
- *      http://www.apache.org/licenses/LICENSE-2.0
- *  
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -40,7 +41,6 @@ import java.util.concurrent.ConcurrentHashMap;
 /**
  * ScriptRouter
  *
- * @author william.liangf
  */
 public class ScriptRouter implements Router {
 
diff --git a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/router/script/ScriptRouterFactory.java b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/router/script/ScriptRouterFactory.java
index 235238e266..18a6c97205 100644
--- a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/router/script/ScriptRouterFactory.java
+++ b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/router/script/ScriptRouterFactory.java
@@ -1,12 +1,13 @@
 /*
- * Copyright 1999-2011 Alibaba Group.
- *  
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *  
- *      http://www.apache.org/licenses/LICENSE-2.0
- *  
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -22,16 +23,15 @@ import com.alibaba.dubbo.rpc.cluster.RouterFactory;
 /**
  * ScriptRouterFactory
  * <p>
- * Script Router Factory用到的URL形如：
+ * Example URLS used by Script Router Factory：
  * <ol>
  * <li> script://registyAddress?type=js&rule=xxxx
  * <li> script:///path/to/routerfile.js?type=js&rule=xxxx
  * <li> script://D:\path\to\routerfile.js?type=js&rule=xxxx
  * <li> script://C:/path/to/routerfile.js?type=js&rule=xxxx
  * </ol>
- * URL的Host一段包含的是Script Router内容的来源，Registry、File etc
+ * The host value in URL points out the address of the source content of the Script Router，Registry、File etc
  *
- * @author william.liangf
  */
 public class ScriptRouterFactory implements RouterFactory {
 
diff --git a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/AbstractClusterInvoker.java b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/AbstractClusterInvoker.java
index 9251310ae7..5bdff6bab9 100644
--- a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/AbstractClusterInvoker.java
+++ b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/AbstractClusterInvoker.java
@@ -1,12 +1,13 @@
 /*
- * Copyright 1999-2011 Alibaba Group.
- *  
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *  
- *      http://www.apache.org/licenses/LICENSE-2.0
- *  
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -37,8 +38,6 @@ import java.util.concurrent.atomic.AtomicBoolean;
 /**
  * AbstractClusterInvoker
  *
- * @author william.liangf
- * @author chao.liuc
  */
 public abstract class AbstractClusterInvoker<T> implements Invoker<T> {
 
@@ -61,7 +60,7 @@ public abstract class AbstractClusterInvoker<T> implements Invoker<T> {
             throw new IllegalArgumentException("service directory == null");
 
         this.directory = directory;
-        //sticky 需要检测 avaliablecheck 
+        //sticky: invoker.isAvailable() should always be checked before using when availablecheck is true.
         this.availablecheck = url.getParameter(Constants.CLUSTER_AVAILABLE_CHECK_KEY, Constants.DEFAULT_CLUSTER_AVAILABLE_CHECK);
     }
 
@@ -88,12 +87,20 @@ public abstract class AbstractClusterInvoker<T> implements Invoker<T> {
     }
 
     /**
-     * 使用loadbalance选择invoker.</br>
-     * a)先lb选择，如果在selected列表中 或者 不可用且做检验时，进入下一步(重选),否则直接返回</br>
-     * b)重选验证规则：selected > available .保证重选出的结果尽量不在select中，并且是可用的
+     * Select a invoker using loadbalance policy.</br>
+     * a)Firstly, select an invoker using loadbalance. If this invoker is in previously selected list, or, if this invoker is unavailable, then continue step b (reselect), otherwise return the first selected invoker</br>
+     * b)Reslection, the validation rule for reselection: selected > available. This rule guarantees that the selected invoker has the minimum chance to be one in the previously selected list, and also guarantees this invoker is available.
      *
-     * @param availablecheck 如果设置true，在选择的时候先选invoker.available == true
-     * @param selected       已选过的invoker.注意：输入保证不重复
+     * @param loadbalance load balance policy
+     * @param invocation
+     * @param invokers invoker candidates
+     * @param selected  exclude selected invokers or not
+     * @return
+     * @throws RpcExceptione
+     */
+    /**
+     *
+
      */
     protected Invoker<T> select(LoadBalance loadbalance, Invocation invocation, List<Invoker<T>> invokers, List<Invoker<T>> selected) throws RpcException {
         if (invokers == null || invokers.size() == 0)
@@ -126,13 +133,13 @@ public abstract class AbstractClusterInvoker<T> implements Invoker<T> {
             return null;
         if (invokers.size() == 1)
             return invokers.get(0);
-        // 如果只有两个invoker，退化成轮循
+        // If we only have two invokers, use round-robin instead.
         if (invokers.size() == 2 && selected != null && selected.size() > 0) {
             return selected.get(0) == invokers.get(0) ? invokers.get(1) : invokers.get(0);
         }
         Invoker<T> invoker = loadbalance.select(invokers, getUrl(), invocation);
 
-        //如果 selected中包含（优先判断） 或者 不可用&&availablecheck=true 则重试.
+        //If the `invoker` is in the  `selected` or invoker is unavailable && availablecheck is true, reselect.
         if ((selected != null && selected.contains(invoker))
                 || (!invoker.isAvailable() && getUrl() != null && availablecheck)) {
             try {
@@ -140,10 +147,10 @@ public abstract class AbstractClusterInvoker<T> implements Invoker<T> {
                 if (rinvoker != null) {
                     invoker = rinvoker;
                 } else {
-                    //看下第一次选的位置，如果不是最后，选+1位置.
+                    //Check the index of current selected invoker, if it's not the last one, choose the one at index+1.
                     int index = invokers.indexOf(invoker);
                     try {
-                        //最后在避免碰撞
+                        //Avoid collision
                         invoker = index < invokers.size() - 1 ? invokers.get(index + 1) : invoker;
                     } catch (Exception e) {
                         logger.warn(e.getMessage() + " may because invokers list dynamic change, ignore.", e);
@@ -157,7 +164,7 @@ public abstract class AbstractClusterInvoker<T> implements Invoker<T> {
     }
 
     /**
-     * 重选，先从非selected的列表中选择，没有在从selected列表中选择.
+     * Reselect, use invokers not in `selected` first, if all invokers are in `selected`, just pick an available one using loadbalance policy.
      *
      * @param loadbalance
      * @param invocation
@@ -170,11 +177,11 @@ public abstract class AbstractClusterInvoker<T> implements Invoker<T> {
                                 List<Invoker<T>> invokers, List<Invoker<T>> selected, boolean availablecheck)
             throws RpcException {
 
-        //预先分配一个，这个列表是一定会用到的.
+        //Allocating one in advance, this list is certain to be used.
         List<Invoker<T>> reselectInvokers = new ArrayList<Invoker<T>>(invokers.size() > 1 ? (invokers.size() - 1) : invokers.size());
 
-        //先从非select中选
-        if (availablecheck) { //选isAvailable 的非select
+        //First, try picking a invoker not in `selected`.
+        if (availablecheck) { // invoker.isAvailable() should be checked
             for (Invoker<T> invoker : invokers) {
                 if (invoker.isAvailable()) {
                     if (selected == null || !selected.contains(invoker)) {
@@ -185,7 +192,7 @@ public abstract class AbstractClusterInvoker<T> implements Invoker<T> {
             if (reselectInvokers.size() > 0) {
                 return loadbalance.select(reselectInvokers, getUrl(), invocation);
             }
-        } else { //选全部非select
+        } else { // do not check invoker.isAvailable()
             for (Invoker<T> invoker : invokers) {
                 if (selected == null || !selected.contains(invoker)) {
                     reselectInvokers.add(invoker);
@@ -195,11 +202,11 @@ public abstract class AbstractClusterInvoker<T> implements Invoker<T> {
                 return loadbalance.select(reselectInvokers, getUrl(), invocation);
             }
         }
-        //最后从select中选可用的. 
+        // Just pick an available invoker using loadbalance policy
         {
             if (selected != null) {
                 for (Invoker<T> invoker : selected) {
-                    if ((invoker.isAvailable()) //优先选available
+                    if ((invoker.isAvailable()) // available first
                             && !reselectInvokers.contains(invoker)) {
                         reselectInvokers.add(invoker);
                     }
diff --git a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/AvailableCluster.java b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/AvailableCluster.java
index 84c78b3d5e..7c6c5f44b7 100644
--- a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/AvailableCluster.java
+++ b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/AvailableCluster.java
@@ -1,12 +1,13 @@
 /*
- * Copyright 1999-2011 Alibaba Group.
- *  
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *  
- *      http://www.apache.org/licenses/LICENSE-2.0
- *  
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -28,7 +29,6 @@ import java.util.List;
 /**
  * AvailableCluster
  *
- * @author william.liangf
  */
 public class AvailableCluster implements Cluster {
 
diff --git a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/AvailableClusterInvoker.java b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/AvailableClusterInvoker.java
index 7d4d127659..d67958fe69 100644
--- a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/AvailableClusterInvoker.java
+++ b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/AvailableClusterInvoker.java
@@ -1,12 +1,13 @@
 /*
- * Copyright 1999-2011 Alibaba Group.
- *  
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *  
- *      http://www.apache.org/licenses/LICENSE-2.0
- *  
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -27,7 +28,6 @@ import java.util.List;
 /**
  * AvailableCluster
  *
- * @author william.liangf
  */
 public class AvailableClusterInvoker<T> extends AbstractClusterInvoker<T> {
 
diff --git a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/BroadcastCluster.java b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/BroadcastCluster.java
index 29f0360760..1e10f53cbf 100644
--- a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/BroadcastCluster.java
+++ b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/BroadcastCluster.java
@@ -1,12 +1,13 @@
 /*
- * Copyright 1999-2012 Alibaba Group.
- *  
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *  
- *      http://www.apache.org/licenses/LICENSE-2.0
- *  
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -23,7 +24,6 @@ import com.alibaba.dubbo.rpc.cluster.Directory;
 /**
  * BroadcastCluster
  *
- * @author william.liangf
  */
 public class BroadcastCluster implements Cluster {
 
diff --git a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/BroadcastClusterInvoker.java b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/BroadcastClusterInvoker.java
index 8601b04a13..da79ace74b 100644
--- a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/BroadcastClusterInvoker.java
+++ b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/BroadcastClusterInvoker.java
@@ -1,12 +1,13 @@
 /*
- * Copyright 1999-2012 Alibaba Group.
- *  
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *  
- *      http://www.apache.org/licenses/LICENSE-2.0
- *  
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -30,7 +31,6 @@ import java.util.List;
 /**
  * BroadcastClusterInvoker
  *
- * @author william.liangf
  */
 public class BroadcastClusterInvoker<T> extends AbstractClusterInvoker<T> {
 
diff --git a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/ClusterUtils.java b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/ClusterUtils.java
index 6867d3cab7..7bc6f30f7f 100644
--- a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/ClusterUtils.java
+++ b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/ClusterUtils.java
@@ -1,12 +1,13 @@
 /*
- * Copyright 1999-2011 Alibaba Group.
- *  
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *  
- *      http://www.apache.org/licenses/LICENSE-2.0
- *  
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -24,7 +25,6 @@ import java.util.Map;
 /**
  * ClusterUtils
  *
- * @author william.liangf
  */
 public class ClusterUtils {
 
@@ -39,7 +39,7 @@ public class ClusterUtils {
         if (remoteMap != null && remoteMap.size() > 0) {
             map.putAll(remoteMap);
 
-            //线程池配置不使用提供者的
+            // Remove configurations from provider, some items should be affected by provider.
             map.remove(Constants.THREAD_NAME_KEY);
             map.remove(Constants.DEFAULT_KEY_PREFIX + Constants.THREAD_NAME_KEY);
 
@@ -66,7 +66,7 @@ public class ClusterUtils {
             map.putAll(localMap);
         }
         if (remoteMap != null && remoteMap.size() > 0) {
-            // 版本号使用提供者的
+            // Use version passed from provider side
             String dubbo = remoteMap.get(Constants.DUBBO_VERSION_KEY);
             if (dubbo != null && dubbo.length() > 0) {
                 map.put(Constants.DUBBO_VERSION_KEY, dubbo);
@@ -83,12 +83,12 @@ public class ClusterUtils {
             if (methods != null && methods.length() > 0) {
                 map.put(Constants.METHODS_KEY, methods);
             }
-            // 保留provider的启动timestamp
+            // Reserve timestamp of provider url.
             String remoteTimestamp = remoteMap.get(Constants.TIMESTAMP_KEY);
             if (remoteTimestamp != null && remoteTimestamp.length() > 0) {
                 map.put(Constants.REMOTE_TIMESTAMP_KEY, remoteMap.get(Constants.TIMESTAMP_KEY));
             }
-            // 合并filter和listener
+            // Combine filters and listeners on Provider and Consumer
             String remoteFilter = remoteMap.get(Constants.REFERENCE_FILTER_KEY);
             String localFilter = localMap.get(Constants.REFERENCE_FILTER_KEY);
             if (remoteFilter != null && remoteFilter.length() > 0
diff --git a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/FailbackCluster.java b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/FailbackCluster.java
index 683f9655b9..13d0dc91e2 100644
--- a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/FailbackCluster.java
+++ b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/FailbackCluster.java
@@ -1,12 +1,13 @@
 /*
- * Copyright 1999-2011 Alibaba Group.
- *  
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *  
- *      http://www.apache.org/licenses/LICENSE-2.0
- *  
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -21,11 +22,8 @@ import com.alibaba.dubbo.rpc.cluster.Cluster;
 import com.alibaba.dubbo.rpc.cluster.Directory;
 
 /**
- * 失败自动恢复，后台记录失败请求，定时重发，通常用于消息通知操作。
- * <p>
- * <a href="http://en.wikipedia.org/wiki/Failback">Failback</a>
+ * {@link FailbackClusterInvoker}
  *
- * @author william.liangf
  */
 public class FailbackCluster implements Cluster {
 
diff --git a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/FailbackClusterInvoker.java b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/FailbackClusterInvoker.java
index 025a2d75f5..280f502bd0 100644
--- a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/FailbackClusterInvoker.java
+++ b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/FailbackClusterInvoker.java
@@ -1,12 +1,13 @@
 /*
- * Copyright 1999-2011 Alibaba Group.
- *  
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *  
- *      http://www.apache.org/licenses/LICENSE-2.0
- *  
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -37,9 +38,11 @@ import java.util.concurrent.ScheduledFuture;
 import java.util.concurrent.TimeUnit;
 
 /**
- * 失败自动恢复，后台记录失败请求，定时重发，通常用于消息通知操作。
+ * When fails, record failure requests and schedule for retry on a regular interval.
+ * Especially useful for services of notification.
+ *
+ * <a href="http://en.wikipedia.org/wiki/Failback">Failback</a>
  *
- * @author tony.chenl
  */
 public class FailbackClusterInvoker<T> extends AbstractClusterInvoker<T> {
 
diff --git a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/FailfastCluster.java b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/FailfastCluster.java
index 64100efdb6..f47c6022bc 100644
--- a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/FailfastCluster.java
+++ b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/FailfastCluster.java
@@ -1,12 +1,13 @@
 /*
- * Copyright 1999-2011 Alibaba Group.
- *  
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *  
- *      http://www.apache.org/licenses/LICENSE-2.0
- *  
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -21,11 +22,8 @@ import com.alibaba.dubbo.rpc.cluster.Cluster;
 import com.alibaba.dubbo.rpc.cluster.Directory;
 
 /**
- * 快速失败，只发起一次调用，失败立即报错，通常用于非幂等性的写操作。
- * <p>
- * <a href="http://en.wikipedia.org/wiki/Fail-fast">Fail-fast</a>
+ * {@link FailfastClusterInvoker}
  *
- * @author william.liangf
  */
 public class FailfastCluster implements Cluster {
 
diff --git a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/FailfastClusterInvoker.java b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/FailfastClusterInvoker.java
index 13e333e841..d1307be567 100644
--- a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/FailfastClusterInvoker.java
+++ b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/FailfastClusterInvoker.java
@@ -1,12 +1,13 @@
 /*
- * Copyright 1999-2011 Alibaba Group.
- *  
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *  
- *      http://www.apache.org/licenses/LICENSE-2.0
- *  
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -27,12 +28,11 @@ import com.alibaba.dubbo.rpc.cluster.LoadBalance;
 import java.util.List;
 
 /**
- * 快速失败，只发起一次调用，失败立即报错，通常用于非幂等性的写操作。
- * <p>
+ * Execute exactly once, which means this policy will throw an exception immediately in case of an invocation error.
+ * Usually used for non-idempotent write operations
+ *
  * <a href="http://en.wikipedia.org/wiki/Fail-fast">Fail-fast</a>
  *
- * @author william.liangf
- * @author chao.liuc
  */
 public class FailfastClusterInvoker<T> extends AbstractClusterInvoker<T> {
 
diff --git a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/FailoverCluster.java b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/FailoverCluster.java
index 878633d3f0..64d731f020 100644
--- a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/FailoverCluster.java
+++ b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/FailoverCluster.java
@@ -1,12 +1,13 @@
 /*
- * Copyright 1999-2011 Alibaba Group.
- *  
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *  
- *      http://www.apache.org/licenses/LICENSE-2.0
- *  
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -21,11 +22,8 @@ import com.alibaba.dubbo.rpc.cluster.Cluster;
 import com.alibaba.dubbo.rpc.cluster.Directory;
 
 /**
- * 失败转移，当出现失败，重试其它服务器，通常用于读操作，但重试会带来更长延迟。
- * <p>
- * <a href="http://en.wikipedia.org/wiki/Failover">Failover</a>
+ * {@link FailoverClusterInvoker}
  *
- * @author william.liangf
  */
 public class FailoverCluster implements Cluster {
 
diff --git a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/FailoverClusterInvoker.java b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/FailoverClusterInvoker.java
index d9a7c2c5ff..90a9a379fa 100644
--- a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/FailoverClusterInvoker.java
+++ b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/FailoverClusterInvoker.java
@@ -1,12 +1,13 @@
 /*
- * Copyright 1999-2011 Alibaba Group.
- *  
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *  
- *      http://www.apache.org/licenses/LICENSE-2.0
- *  
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -34,12 +35,11 @@ import java.util.List;
 import java.util.Set;
 
 /**
- * 失败转移，当出现失败，重试其它服务器，通常用于读操作，但重试会带来更长延迟。
+ * When invoke fails, log the initial error and retry other invokers (retry n times, which means at most n different invokers will be invoked)
+ * Note that retry causes latency.
  * <p>
  * <a href="http://en.wikipedia.org/wiki/Failover">Failover</a>
  *
- * @author william.liangf
- * @author chao.liuc
  */
 public class FailoverClusterInvoker<T> extends AbstractClusterInvoker<T> {
 
@@ -62,12 +62,12 @@ public class FailoverClusterInvoker<T> extends AbstractClusterInvoker<T> {
         List<Invoker<T>> invoked = new ArrayList<Invoker<T>>(copyinvokers.size()); // invoked invokers.
         Set<String> providers = new HashSet<String>(len);
         for (int i = 0; i < len; i++) {
-            //重试时，进行重新选择，避免重试时invoker列表已发生变化.
-            //注意：如果列表发生了变化，那么invoked判断会失效，因为invoker示例已经改变
+            //Reselect before retry to avoid a change of candidate `invokers`.
+            //NOTE: if `invokers` changed, then `invoked` also lose accuracy.
             if (i > 0) {
                 checkWhetherDestroyed();
                 copyinvokers = list(invocation);
-                //重新检查一下
+                // check again
                 checkInvokers(copyinvokers, invocation);
             }
             Invoker<T> invoker = select(loadbalance, invocation, copyinvokers, invoked);
diff --git a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/FailsafeCluster.java b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/FailsafeCluster.java
index 6b127fe07f..a085eb85cd 100644
--- a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/FailsafeCluster.java
+++ b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/FailsafeCluster.java
@@ -1,12 +1,13 @@
 /*
- * Copyright 1999-2011 Alibaba Group.
- *  
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *  
- *      http://www.apache.org/licenses/LICENSE-2.0
- *  
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -21,11 +22,8 @@ import com.alibaba.dubbo.rpc.cluster.Cluster;
 import com.alibaba.dubbo.rpc.cluster.Directory;
 
 /**
- * 失败安全，出现异常时，直接忽略，通常用于写入审计日志等操作。
- * <p>
- * <a href="http://en.wikipedia.org/wiki/Fail-safe">Fail-safe</a>
+ * {@link FailsafeClusterInvoker}
  *
- * @author william.liangf
  */
 public class FailsafeCluster implements Cluster {
 
diff --git a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/FailsafeClusterInvoker.java b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/FailsafeClusterInvoker.java
index e44ce23be7..bfdc80d018 100644
--- a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/FailsafeClusterInvoker.java
+++ b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/FailsafeClusterInvoker.java
@@ -1,12 +1,13 @@
 /*
- * Copyright 1999-2011 Alibaba Group.
- *  
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *  
- *      http://www.apache.org/licenses/LICENSE-2.0
- *  
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -28,11 +29,11 @@ import com.alibaba.dubbo.rpc.cluster.LoadBalance;
 import java.util.List;
 
 /**
- * 失败安全，出现异常时，直接忽略，通常用于写入审计日志等操作。
- * <p>
+ * When invoke fails, log the error message and ignore this error by returning an empty RpcResult.
+ * Usually used to write audit logs and other operations
+ *
  * <a href="http://en.wikipedia.org/wiki/Fail-safe">Fail-safe</a>
  *
- * @author william.liangf
  */
 public class FailsafeClusterInvoker<T> extends AbstractClusterInvoker<T> {
     private static final Logger logger = LoggerFactory.getLogger(FailsafeClusterInvoker.class);
diff --git a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/ForkingCluster.java b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/ForkingCluster.java
index 70192013cc..e0da2966ea 100644
--- a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/ForkingCluster.java
+++ b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/ForkingCluster.java
@@ -1,12 +1,13 @@
 /*
- * Copyright 1999-2011 Alibaba Group.
- *  
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *  
- *      http://www.apache.org/licenses/LICENSE-2.0
- *  
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -21,11 +22,8 @@ import com.alibaba.dubbo.rpc.cluster.Cluster;
 import com.alibaba.dubbo.rpc.cluster.Directory;
 
 /**
- * 并行调用，只要一个成功即返回，通常用于实时性要求较高的操作，但需要浪费更多服务资源。
- * <p>
- * <a href="http://en.wikipedia.org/wiki/Fork_(topology)">Fork</a>
+ * {@link ForkingClusterInvoker}
  *
- * @author william.liangf
  */
 public class ForkingCluster implements Cluster {
 
diff --git a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/ForkingClusterInvoker.java b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/ForkingClusterInvoker.java
index c6bc2cae31..307d82a73c 100644
--- a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/ForkingClusterInvoker.java
+++ b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/ForkingClusterInvoker.java
@@ -1,12 +1,13 @@
 /*
- * Copyright 1999-2011 Alibaba Group.
- *  
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *  
- *      http://www.apache.org/licenses/LICENSE-2.0
- *  
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -35,11 +36,10 @@ import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicInteger;
 
 /**
- * 并行调用，只要一个成功即返回，通常用于实时性要求较高的操作，但需要浪费更多服务资源。
- * <p>
+ * Invoke a specific number of invokers concurrently, usually used for demanding real-time operations, but need to waste more service resources.
+ *
  * <a href="http://en.wikipedia.org/wiki/Fork_(topology)">Fork</a>
  *
- * @author william.liangf
  */
 public class ForkingClusterInvoker<T> extends AbstractClusterInvoker<T> {
 
@@ -60,9 +60,9 @@ public class ForkingClusterInvoker<T> extends AbstractClusterInvoker<T> {
         } else {
             selected = new ArrayList<Invoker<T>>();
             for (int i = 0; i < forks; i++) {
-                //在invoker列表(排除selected)后,如果没有选够,则存在重复循环问题.见select实现.
+                // TODO. Add some comment here, refer chinese version for more details.
                 Invoker<T> invoker = select(loadbalance, invocation, invokers, selected);
-                if (!selected.contains(invoker)) {//防止重复添加invoker
+                if (!selected.contains(invoker)) {//Avoid add the same invoker several times.
                     selected.add(invoker);
                 }
             }
diff --git a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/MergeableCluster.java b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/MergeableCluster.java
index 69b3509421..18a472766f 100644
--- a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/MergeableCluster.java
+++ b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/MergeableCluster.java
@@ -1,12 +1,13 @@
 /*
- * Copyright 1999-2011 Alibaba Group.
- *  
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *  
- *      http://www.apache.org/licenses/LICENSE-2.0
- *  
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -21,7 +22,6 @@ import com.alibaba.dubbo.rpc.cluster.Cluster;
 import com.alibaba.dubbo.rpc.cluster.Directory;
 
 /**
- * @author <a href="mailto:gang.lvg@alibaba-inc.com">kimi</a>
  */
 public class MergeableCluster implements Cluster {
 
diff --git a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/MergeableClusterInvoker.java b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/MergeableClusterInvoker.java
index a4f3163105..b9036ce90e 100644
--- a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/MergeableClusterInvoker.java
+++ b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/MergeableClusterInvoker.java
@@ -1,12 +1,13 @@
 /*
- * Copyright 1999-2011 Alibaba Group.
- *  
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *  
- *      http://www.apache.org/licenses/LICENSE-2.0
- *  
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -46,7 +47,6 @@ import java.util.concurrent.Future;
 import java.util.concurrent.TimeUnit;
 
 /**
- * @author <a href="mailto:gang.lvg@alibaba-inc.com">kimi</a>
  */
 @SuppressWarnings("unchecked")
 public class MergeableClusterInvoker<T> implements Invoker<T> {
@@ -64,7 +64,7 @@ public class MergeableClusterInvoker<T> implements Invoker<T> {
         List<Invoker<T>> invokers = directory.list(invocation);
 
         String merger = getUrl().getMethodParameter(invocation.getMethodName(), Constants.MERGER_KEY);
-        if (ConfigUtils.isEmpty(merger)) { // 如果方法不需要Merge，退化为只调一个Group
+        if (ConfigUtils.isEmpty(merger)) { // If a method doesn't have a merger, only invoke one Group
             for (final Invoker<T> invoker : invokers) {
                 if (invoker.isAvailable()) {
                     return invoker.invoke(invocation);
diff --git a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/wrapper/MockClusterInvoker.java b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/wrapper/MockClusterInvoker.java
index 775b718611..eedc9f4ad3 100644
--- a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/wrapper/MockClusterInvoker.java
+++ b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/wrapper/MockClusterInvoker.java
@@ -1,12 +1,13 @@
 /*
- * Copyright 1999-2011 Alibaba Group.
- *  
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *  
- *      http://www.apache.org/licenses/LICENSE-2.0
- *  
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -32,7 +33,6 @@ import com.alibaba.dubbo.rpc.support.MockInvoker;
 import java.util.List;
 
 /**
- * @author chao.liuc
  */
 public class MockClusterInvoker<T> implements Invoker<T> {
 
@@ -129,10 +129,10 @@ public class MockClusterInvoker<T> implements Invoker<T> {
     }
 
     /**
-     * 返回MockInvoker
-     * 契约：
-     * directory根据invocation中是否有Constants.INVOCATION_NEED_MOCK，来判断获取的是一个normal invoker 还是一个 mock invoker
-     * 如果directorylist 返回多个mock invoker，只使用第一个invoker.
+     * Return MockInvoker
+     * Contract：
+     * directory.list() will return a list of normal invokers if Constants.INVOCATION_NEED_MOCK is present in invocation, otherwise, a list of mock invokers will return.
+     * if directory.list() returns more than one mock invoker, only one of them will be used.
      *
      * @param invocation
      * @return
@@ -141,9 +141,9 @@ public class MockClusterInvoker<T> implements Invoker<T> {
         List<Invoker<T>> invokers = null;
         //TODO generic invoker？
         if (invocation instanceof RpcInvocation) {
-            //存在隐含契约(虽然在接口声明中增加描述，但扩展性会存在问题.同时放在attachement中的做法需要改进
+            //Note the implicit contract (although the description is added to the interface declaration, but extensibility is a problem. The practice placed in the attachement needs to be improved)
             ((RpcInvocation) invocation).setAttachment(Constants.INVOCATION_NEED_MOCK, Boolean.TRUE.toString());
-            //directory根据invocation中attachment是否有Constants.INVOCATION_NEED_MOCK，来判断获取的是normal invokers or mock invokers
+            //directory will return a list of normal invokers if Constants.INVOCATION_NEED_MOCK is present in invocation, otherwise, a list of mock invokers will return.
             try {
                 invokers = directory.list(invocation);
             } catch (RpcException e) {
diff --git a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/wrapper/MockClusterWrapper.java b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/wrapper/MockClusterWrapper.java
index 5dc9ee437d..b2b3488579 100644
--- a/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/wrapper/MockClusterWrapper.java
+++ b/dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/wrapper/MockClusterWrapper.java
@@ -1,12 +1,13 @@
 /*
- * Copyright 1999-2011 Alibaba Group.
- *  
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *  
- *      http://www.apache.org/licenses/LICENSE-2.0
- *  
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -23,7 +24,6 @@ import com.alibaba.dubbo.rpc.cluster.Directory;
 /**
  * mock impl
  *
- * @author chao.liuc
  */
 public class MockClusterWrapper implements Cluster {
 
diff --git a/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/StickyTest.java b/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/StickyTest.java
index 7c0c27e3ce..10c72a1784 100644
--- a/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/StickyTest.java
+++ b/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/StickyTest.java
@@ -1,12 +1,13 @@
 /*
- * Copyright 1999-2011 Alibaba Group.
- *  
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *  
- *      http://www.apache.org/licenses/LICENSE-2.0
- *  
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -101,7 +102,7 @@ public class StickyTest {
 
     @Test
     public void testMethodsSticky() {
-        for (int i = 0; i < 100; i++) {//多次调用看两个方法是否都选在同一个invoker
+        for (int i = 0; i < 100; i++) {//Two different methods should always use the same invoker every time.
             int count1 = testSticky("method1", true);
             int count2 = testSticky("method2", true);
             Assert.assertTrue(count1 == count2);
diff --git a/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/configurator/absent/AbsentConfiguratorTest.java b/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/configurator/absent/AbsentConfiguratorTest.java
index 9eaf912aba..e6d4107f8f 100644
--- a/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/configurator/absent/AbsentConfiguratorTest.java
+++ b/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/configurator/absent/AbsentConfiguratorTest.java
@@ -1,12 +1,13 @@
 /*
- * Copyright 1999-2012 Alibaba Group.
- *  
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *  
- *      http://www.apache.org/licenses/LICENSE-2.0
- *  
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -24,7 +25,6 @@ import org.junit.Test;
 /**
  * OverrideConfiguratorTest
  *
- * @author william.liangf
  */
 public class AbsentConfiguratorTest {
 
diff --git a/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/configurator/override/OverrideConfiguratorTest.java b/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/configurator/override/OverrideConfiguratorTest.java
index 4f7f90773f..3e62443839 100644
--- a/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/configurator/override/OverrideConfiguratorTest.java
+++ b/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/configurator/override/OverrideConfiguratorTest.java
@@ -1,12 +1,13 @@
 /*
- * Copyright 1999-2012 Alibaba Group.
- *  
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *  
- *      http://www.apache.org/licenses/LICENSE-2.0
- *  
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -25,7 +26,6 @@ import org.junit.Test;
 /**
  * OverrideConfiguratorTest
  *
- * @author william.liangf
  */
 public class OverrideConfiguratorTest {
 
diff --git a/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/filter/DemoService.java b/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/filter/DemoService.java
index 8528ee4994..e7d5575fcf 100644
--- a/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/filter/DemoService.java
+++ b/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/filter/DemoService.java
@@ -1,12 +1,13 @@
 /*
- * Copyright 1999-2011 Alibaba Group.
- *  
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *  
- *      http://www.apache.org/licenses/LICENSE-2.0
- *  
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
diff --git a/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/filter/DemoServiceLocal.java b/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/filter/DemoServiceLocal.java
index c04d45859b..342b2e6cea 100644
--- a/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/filter/DemoServiceLocal.java
+++ b/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/filter/DemoServiceLocal.java
@@ -1,12 +1,13 @@
 /*
- * Copyright 1999-2011 Alibaba Group.
- *  
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *  
- *      http://www.apache.org/licenses/LICENSE-2.0
- *  
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
diff --git a/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/filter/DemoServiceMock.java b/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/filter/DemoServiceMock.java
index 7b6e1199b7..04db836ebd 100644
--- a/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/filter/DemoServiceMock.java
+++ b/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/filter/DemoServiceMock.java
@@ -1,12 +1,13 @@
 /*
- * Copyright 1999-2011 Alibaba Group.
- *  
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *  
- *      http://www.apache.org/licenses/LICENSE-2.0
- *  
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -18,7 +19,6 @@ package com.alibaba.dubbo.rpc.cluster.filter;
 /**
  * MockService.java
  *
- * @author tony.chenl
  */
 public class DemoServiceMock implements DemoService {
     public String sayHello(String name) {
diff --git a/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/filter/DemoServiceStub.java b/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/filter/DemoServiceStub.java
index afd1ad0652..cdc80c341c 100644
--- a/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/filter/DemoServiceStub.java
+++ b/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/filter/DemoServiceStub.java
@@ -1,12 +1,13 @@
 /*
- * Copyright 1999-2011 Alibaba Group.
- *  
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *  
- *      http://www.apache.org/licenses/LICENSE-2.0
- *  
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
diff --git a/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/filter/MockService.java b/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/filter/MockService.java
index 27399acaac..49bea97465 100644
--- a/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/filter/MockService.java
+++ b/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/filter/MockService.java
@@ -1,12 +1,13 @@
 /*
- * Copyright 1999-2011 Alibaba Group.
- *  
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *  
- *      http://www.apache.org/licenses/LICENSE-2.0
- *  
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -18,7 +19,6 @@ package com.alibaba.dubbo.rpc.cluster.filter;
 /**
  * MockService.java
  *
- * @author tony.chenl
  */
 public class MockService implements DemoService {
     public String sayHello(String name) {
diff --git a/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/loadbalance/LoadBalanceTest.java b/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/loadbalance/LoadBalanceTest.java
index 031c5136e9..902d145eff 100644
--- a/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/loadbalance/LoadBalanceTest.java
+++ b/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/loadbalance/LoadBalanceTest.java
@@ -1,12 +1,13 @@
 /*
- * Copyright 1999-2011 Alibaba Group.
- *  
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *  
- *      http://www.apache.org/licenses/LICENSE-2.0
- *  
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -38,7 +39,6 @@ import java.util.concurrent.atomic.AtomicLong;
 /**
  * RoundRobinLoadBalanceTest
  *
- * @author liuchao
  */
 @SuppressWarnings({"unchecked", "rawtypes"})
 public class LoadBalanceTest {
diff --git a/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/merger/ResultMergerTest.java b/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/merger/ResultMergerTest.java
index 6a11c77cbd..894e5406ac 100644
--- a/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/merger/ResultMergerTest.java
+++ b/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/merger/ResultMergerTest.java
@@ -1,12 +1,13 @@
 /*
- * Copyright 1999-2011 Alibaba Group.
- *  
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *  
- *      http://www.apache.org/licenses/LICENSE-2.0
- *  
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -25,7 +26,6 @@ import java.util.List;
 import java.util.Set;
 
 /**
- * @author <a href="mailto:gang.lvg@alibaba-inc.com">kimi</a>
  */
 public class ResultMergerTest {
 
diff --git a/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/router/MockInvoker.java b/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/router/MockInvoker.java
index f58c0e258c..cba7230b90 100644
--- a/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/router/MockInvoker.java
+++ b/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/router/MockInvoker.java
@@ -1,12 +1,13 @@
 /*
- * Copyright 1999-2011 Alibaba Group.
- *  
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *  
- *      http://www.apache.org/licenses/LICENSE-2.0
- *  
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
diff --git a/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/router/condition/ConditionRouterTest.java b/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/router/condition/ConditionRouterTest.java
index 1bd0b3b41f..e003b02d25 100644
--- a/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/router/condition/ConditionRouterTest.java
+++ b/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/router/condition/ConditionRouterTest.java
@@ -1,12 +1,13 @@
 /*
- * Copyright 1999-2011 Alibaba Group.
- *  
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *  
- *      http://www.apache.org/licenses/LICENSE-2.0
- *  
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -142,16 +143,16 @@ public class ConditionRouterTest {
     @Test
     public void testRoute_methodRoute() {
         Invocation invocation = new RpcInvocation("getFoo", new Class<?>[0], new Object[0]);
-        // 有多个方法时，没法匹配
+        // More than one methods, mismatch
         Router router = new ConditionRouterFactory().getRouter(getRouteUrl("methods=getFoo => host = 1.2.3.4"));
         boolean matchWhen = ((ConditionRouter) router).matchWhen(
                 URL.valueOf("consumer://1.1.1.1/com.foo.BarService?methods=setFoo,getFoo,findFoo"), invocation);
         Assert.assertEquals(true, matchWhen);
-        // 只有一个方法时，可以匹配
+        // Exactly one method, match
         matchWhen = ((ConditionRouter) router).matchWhen(
                 URL.valueOf("consumer://1.1.1.1/com.foo.BarService?methods=getFoo"), invocation);
         Assert.assertEquals(true, matchWhen);
-        // 方法和其他参数一起，测试无影响
+        // Method routing and Other condition routing can work together
         Router router2 = new ConditionRouterFactory()
                 .getRouter(getRouteUrl("methods=getFoo & host!=1.1.1.1 => host = 1.2.3.4"));
         matchWhen = ((ConditionRouter) router2).matchWhen(
@@ -163,7 +164,7 @@ public class ConditionRouterTest {
         matchWhen = ((ConditionRouter) router3).matchWhen(
                 URL.valueOf("consumer://1.1.1.1/com.foo.BarService?methods=getFoo"), invocation);
         Assert.assertEquals(true, matchWhen);
-        // filter过滤条件测试
+        // Test filter condition
         List<Invoker<String>> invokers = new ArrayList<Invoker<String>>();
         Invoker<String> invoker1 = new MockInvoker<String>(URL.valueOf("dubbo://10.20.3.3:20880/com.foo.BarService"));
         Invoker<String> invoker2 = new MockInvoker<String>(URL.valueOf("dubbo://" + NetUtils.getLocalHost()
@@ -187,7 +188,7 @@ public class ConditionRouterTest {
         List<Invoker<String>> fileredInvokers2 = router5.route(invokers,
                 URL.valueOf("consumer://" + NetUtils.getLocalHost() + "/com.foo.BarService"), invocation);
         Assert.assertEquals(3, fileredInvokers2.size());
-        // 调用不存在的方法时
+        // Request a non-exists method
     }
 
     @Test
diff --git a/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/router/file/FileRouterEngineTest.java b/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/router/file/FileRouterEngineTest.java
index 0a8631daf8..243f02e656 100644
--- a/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/router/file/FileRouterEngineTest.java
+++ b/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/router/file/FileRouterEngineTest.java
@@ -1,12 +1,13 @@
 /*
- * Copyright 1999-2011 Alibaba Group.
- *  
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *  
- *      http://www.apache.org/licenses/LICENSE-2.0
- *  
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -42,7 +43,6 @@ import java.util.Arrays;
 import java.util.List;
 
 /**
- * @author chao.liuc
  */
 @SuppressWarnings("unchecked")
 public class FileRouterEngineTest {
diff --git a/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/router/script/ScriptRouterTest.java b/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/router/script/ScriptRouterTest.java
index 75f32875da..89731f8cce 100644
--- a/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/router/script/ScriptRouterTest.java
+++ b/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/router/script/ScriptRouterTest.java
@@ -1,12 +1,13 @@
 /*
- * Copyright 1999-2011 Alibaba Group.
- *  
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *  
- *      http://www.apache.org/licenses/LICENSE-2.0
- *  
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
diff --git a/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/support/AbstractClusterInvokerTest.java b/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/support/AbstractClusterInvokerTest.java
index 1293ab2d46..901b84c1be 100644
--- a/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/support/AbstractClusterInvokerTest.java
+++ b/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/support/AbstractClusterInvokerTest.java
@@ -1,12 +1,13 @@
 /*
- * Copyright 1999-2011 Alibaba Group.
- *  
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *  
- *      http://www.apache.org/licenses/LICENSE-2.0
- *  
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -47,7 +48,6 @@ import java.util.concurrent.atomic.AtomicLong;
 /**
  * AbstractClusterInvokerTest
  *
- * @author chao.liuc
  */
 @SuppressWarnings("rawtypes")
 public class AbstractClusterInvokerTest {
@@ -198,7 +198,7 @@ public class AbstractClusterInvokerTest {
         LoadBalance lb = ExtensionLoader.getExtensionLoader(LoadBalance.class).getExtension(RoundRobinLoadBalance.NAME);
         initlistsize5();
         {
-            //边界测试.
+            //Boundary condition test .
             selectedInvokers.clear();
             selectedInvokers.add(invoker2);
             selectedInvokers.add(invoker3);
@@ -208,7 +208,7 @@ public class AbstractClusterInvokerTest {
             Assert.assertSame(invoker1, sinvoker);
         }
         {
-            //边界测试.
+            //Boundary condition test .
             selectedInvokers.clear();
             selectedInvokers.add(invoker1);
             selectedInvokers.add(invoker3);
@@ -218,7 +218,7 @@ public class AbstractClusterInvokerTest {
             Assert.assertSame(invoker2, sinvoker);
         }
         {
-            //边界测试.
+            //Boundary condition test .
             selectedInvokers.clear();
             selectedInvokers.add(invoker1);
             selectedInvokers.add(invoker2);
@@ -228,7 +228,7 @@ public class AbstractClusterInvokerTest {
             Assert.assertSame(invoker3, sinvoker);
         }
         {
-            //边界测试.
+            //Boundary condition test .
             selectedInvokers.clear();
             selectedInvokers.add(invoker1);
             selectedInvokers.add(invoker2);
@@ -238,7 +238,7 @@ public class AbstractClusterInvokerTest {
             Assert.assertSame(invoker5, sinvoker);
         }
         {
-            //边界测试.
+            //Boundary condition test .
             selectedInvokers.clear();
             selectedInvokers.add(invoker1);
             selectedInvokers.add(invoker2);
@@ -257,7 +257,7 @@ public class AbstractClusterInvokerTest {
         LoadBalance lb = ExtensionLoader.getExtensionLoader(LoadBalance.class).getExtension(RoundRobinLoadBalance.NAME);
         initlistsize5();
         {
-            //边界测试.
+            //Boundary condition test .
             selectedInvokers.clear();
             selectedInvokers.add(invoker1);
             selectedInvokers.add(invoker2);
@@ -267,7 +267,7 @@ public class AbstractClusterInvokerTest {
             Assert.assertTrue(sinvoker == invoker4);
         }
         {
-            //边界测试.
+            //Boundary condition test .
             selectedInvokers.clear();
             selectedInvokers.add(invoker2);
             selectedInvokers.add(invoker3);
@@ -277,7 +277,7 @@ public class AbstractClusterInvokerTest {
             Assert.assertTrue(sinvoker == invoker2 || sinvoker == invoker4);
         }
         {
-            //边界测试.
+            //Boundary condition test .
             for (int i = 0; i < 100; i++) {
                 selectedInvokers.clear();
                 Invoker sinvoker = cluster.select(lb, invocation, invokers, selectedInvokers);
@@ -285,7 +285,7 @@ public class AbstractClusterInvokerTest {
             }
         }
         {
-            //边界测试.
+            //Boundary condition test .
             for (int i = 0; i < 100; i++) {
                 selectedInvokers.clear();
                 selectedInvokers.add(invoker1);
@@ -296,7 +296,7 @@ public class AbstractClusterInvokerTest {
             }
         }
         {
-            //边界测试.
+            //Boundary condition test .
             for (int i = 0; i < 100; i++) {
                 selectedInvokers.clear();
                 selectedInvokers.add(invoker1);
@@ -361,7 +361,7 @@ public class AbstractClusterInvokerTest {
     }
 
     /**
-     * 测试均衡.
+     * Test balance.
      */
     @Test
     public void testSelectBalance() {
@@ -394,7 +394,7 @@ public class AbstractClusterInvokerTest {
 
     private void initlistsize5() {
         invokers.clear();
-        selectedInvokers.clear();//需要清除，之前的测试中会主动将正确的invoker2放入其中.
+        selectedInvokers.clear();//Clear first, previous test case will make sure that the right invoker2 will be used.
         invokers.add(invoker1);
         invokers.add(invoker2);
         invokers.add(invoker3);
@@ -451,7 +451,7 @@ public class AbstractClusterInvokerTest {
     }
 
     /**
-     * 测试mock invoker选择是否正常
+     * Test mock invoker selector works as expected
      */
     @Test
     public void testMockedInvokerSelect() {
diff --git a/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/support/ClusterUtilsTest.java b/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/support/ClusterUtilsTest.java
index e9a44d9511..a65f225bd3 100644
--- a/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/support/ClusterUtilsTest.java
+++ b/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/support/ClusterUtilsTest.java
@@ -1,11 +1,12 @@
 /*
- * Copyright 1999-2012 Alibaba Group.
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
  *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
+ *     http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
@@ -22,7 +23,6 @@ import org.junit.Assert;
 import org.junit.Test;
 
 /**
- * @author <a href="mailto:gang.lvg@alibaba-inc.com">kimi</a>
  */
 public class ClusterUtilsTest {
 
diff --git a/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/support/FailSafeClusterInvokerTest.java b/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/support/FailSafeClusterInvokerTest.java
index d161f6dcd8..6be89a7408 100644
--- a/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/support/FailSafeClusterInvokerTest.java
+++ b/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/support/FailSafeClusterInvokerTest.java
@@ -1,12 +1,13 @@
 /*
- * Copyright 1999-2011 Alibaba Group.
- *  
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *  
- *      http://www.apache.org/licenses/LICENSE-2.0
- *  
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -39,7 +40,6 @@ import static org.junit.Assert.assertTrue;
 /**
  * FailfastClusterInvokerTest
  *
- * @author tony.chenl
  */
 @SuppressWarnings("unchecked")
 public class FailSafeClusterInvokerTest {
diff --git a/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/support/FailbackClusterInvokerTest.java b/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/support/FailbackClusterInvokerTest.java
index e8954f6b28..4d7b7e67b8 100644
--- a/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/support/FailbackClusterInvokerTest.java
+++ b/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/support/FailbackClusterInvokerTest.java
@@ -1,12 +1,13 @@
 /*
- * Copyright 1999-2011 Alibaba Group.
- *  
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *  
- *      http://www.apache.org/licenses/LICENSE-2.0
- *  
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -38,7 +39,6 @@ import static org.junit.Assert.assertEquals;
 /**
  * FailbackClusterInvokerTest
  *
- * @author tony.chenl
  */
 @SuppressWarnings("unchecked")
 public class FailbackClusterInvokerTest {
diff --git a/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/support/FailfastClusterInvokerTest.java b/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/support/FailfastClusterInvokerTest.java
index 15a6874674..c8c8ec087a 100644
--- a/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/support/FailfastClusterInvokerTest.java
+++ b/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/support/FailfastClusterInvokerTest.java
@@ -1,12 +1,13 @@
 /*
- * Copyright 1999-2011 Alibaba Group.
- *  
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *  
- *      http://www.apache.org/licenses/LICENSE-2.0
- *  
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -39,7 +40,6 @@ import static org.junit.Assert.fail;
 /**
  * FailfastClusterInvokerTest
  *
- * @author liuchao
  */
 @SuppressWarnings("unchecked")
 public class FailfastClusterInvokerTest {
diff --git a/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/support/FailoverClusterInvokerTest.java b/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/support/FailoverClusterInvokerTest.java
index 2fb5fbc42a..07b00388a5 100644
--- a/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/support/FailoverClusterInvokerTest.java
+++ b/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/support/FailoverClusterInvokerTest.java
@@ -1,12 +1,13 @@
 /*
- * Copyright 1999-2011 Alibaba Group.
- *  
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *  
- *      http://www.apache.org/licenses/LICENSE-2.0
- *  
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -43,7 +44,6 @@ import static org.junit.Assert.fail;
 /**
  * FailoverClusterInvokerTest
  *
- * @author liuchao
  */
 @SuppressWarnings("unchecked")
 public class FailoverClusterInvokerTest {
@@ -177,7 +177,8 @@ public class FailoverClusterInvokerTest {
     }
 
     /**
-     * 测试在调用重试过程中，directory列表变更，invoke重试时重新进行list选择
+     * When invokers in directory changes after a failed request but just before a retry effort,
+     * then we should reselect from the latest invokers before retry.
      */
     @Test
     public void testInvokerDestoryAndReList() {
@@ -195,7 +196,7 @@ public class FailoverClusterInvokerTest {
 
         Callable<Object> callable = new Callable<Object>() {
             public Object call() throws Exception {
-                //模拟invoker全部被destroy掉
+                //Simulation: all invokers are destroyed
                 for (Invoker<Demo> invoker : invokers) {
                     invoker.destroy();
                 }
diff --git a/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/support/ForkingClusterInvokerTest.java b/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/support/ForkingClusterInvokerTest.java
index a8e5e4922f..2dd13866f6 100644
--- a/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/support/ForkingClusterInvokerTest.java
+++ b/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/support/ForkingClusterInvokerTest.java
@@ -1,12 +1,13 @@
 /*
- * Copyright 1999-2011 Alibaba Group.
- *  
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *  
- *      http://www.apache.org/licenses/LICENSE-2.0
- *  
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -37,7 +38,6 @@ import static org.junit.Assert.assertFalse;
 /**
  * ForkingClusterInvokerTest
  *
- * @author tony.chenl
  */
 @SuppressWarnings("unchecked")
 public class ForkingClusterInvokerTest {
diff --git a/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/support/Menu.java b/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/support/Menu.java
index 5215e5ffe9..a392cb9491 100644
--- a/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/support/Menu.java
+++ b/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/support/Menu.java
@@ -1,12 +1,13 @@
 /*
- * Copyright 1999-2011 Alibaba Group.
- *  
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *  
- *      http://www.apache.org/licenses/LICENSE-2.0
- *  
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -22,7 +23,6 @@ import java.util.List;
 import java.util.Map;
 
 /**
- * @author <a href="mailto:gang.lvg@alibaba-inc.com">kimi</a>
  */
 public class Menu {
 
diff --git a/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/support/MenuService.java b/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/support/MenuService.java
index 12eb4978f0..3840c05dd5 100644
--- a/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/support/MenuService.java
+++ b/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/support/MenuService.java
@@ -1,12 +1,13 @@
 /*
- * Copyright 1999-2011 Alibaba Group.
- *  
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *  
- *      http://www.apache.org/licenses/LICENSE-2.0
- *  
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -18,7 +19,6 @@ package com.alibaba.dubbo.rpc.cluster.support;
 import java.util.List;
 
 /**
- * @author <a href="mailto:gang.lvg@alibaba-inc.com">kimi</a>
  */
 public interface MenuService {
 
diff --git a/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/support/MergeableClusterInvokerTest.java b/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/support/MergeableClusterInvokerTest.java
index a9acd3afba..2f45f3e32d 100644
--- a/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/support/MergeableClusterInvokerTest.java
+++ b/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/support/MergeableClusterInvokerTest.java
@@ -1,12 +1,13 @@
 /*
- * Copyright 1999-2011 Alibaba Group.
- *  
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *  
- *      http://www.apache.org/licenses/LICENSE-2.0
- *  
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -40,7 +41,6 @@ import java.util.List;
 import java.util.Map;
 
 /**
- * @author <a href="mailto:gang.lvg@alibaba-inc.com">kimi</a>
  */
 public class MergeableClusterInvokerTest {
 
diff --git a/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/support/wrapper/MockClusterInvokerTest.java b/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/support/wrapper/MockClusterInvokerTest.java
index cd1d1159da..0ce7ef52b0 100644
--- a/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/support/wrapper/MockClusterInvokerTest.java
+++ b/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/support/wrapper/MockClusterInvokerTest.java
@@ -1,3 +1,19 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package com.alibaba.dubbo.rpc.cluster.support.wrapper;
 
 import com.alibaba.dubbo.common.Constants;
@@ -34,7 +50,7 @@ public class MockClusterInvokerTest {
     }
 
     /**
-     * 测试mock策略是否正常-fail-mock
+     * Test if mock policy works fine: fail-mock
      */
     @Test
     public void testMockInvokerInvoke_normal() {
@@ -48,13 +64,13 @@ public class MockClusterInvokerTest {
         Invoker<IHelloService> mInvoker1 = protocol.refer(IHelloService.class, mockUrl);
         invokers.add(mInvoker1);
 
-        //方法配置了mock
+        //Configured with mock
         RpcInvocation invocation = new RpcInvocation();
         invocation.setMethodName("getSomething");
         Result ret = cluster.invoke(invocation);
         Assert.assertEquals("something", ret.getValue());
 
-        //如果没有配置mock，则直接返回null
+        // If no mock was configured, return null directly
         invocation = new RpcInvocation();
         invocation.setMethodName("sayHello");
         ret = cluster.invoke(invocation);
@@ -62,7 +78,7 @@ public class MockClusterInvokerTest {
     }
 
     /**
-     * 测试mock策略是否正常-fail-mock
+     * Test if mock policy works fine: fail-mock
      */
     @Test
     public void testMockInvokerInvoke_failmock() {
@@ -77,19 +93,19 @@ public class MockClusterInvokerTest {
         Invoker<IHelloService> mInvoker1 = protocol.refer(IHelloService.class, mockUrl);
         invokers.add(mInvoker1);
 
-        //方法配置了mock
+        //Configured with mock
         RpcInvocation invocation = new RpcInvocation();
         invocation.setMethodName("getSomething");
         Result ret = cluster.invoke(invocation);
         Assert.assertEquals("aa", ret.getValue());
 
-        //如果没有配置mock，则直接返回null
+        // If no mock was configured, return null directly
         invocation = new RpcInvocation();
         invocation.setMethodName("getSomething2");
         ret = cluster.invoke(invocation);
         Assert.assertEquals(null, ret.getValue());
 
-        //如果没有配置mock，则直接返回null
+        // If no mock was configured, return null directly
         invocation = new RpcInvocation();
         invocation.setMethodName("sayHello");
         ret = cluster.invoke(invocation);
@@ -98,7 +114,7 @@ public class MockClusterInvokerTest {
 
 
     /**
-     * 测试mock策略是否正常-force-mork
+     * Test if mock policy works fine: force-mock
      */
     @Test
     public void testMockInvokerInvoke_forcemock() {
@@ -113,19 +129,19 @@ public class MockClusterInvokerTest {
         Invoker<IHelloService> mInvoker1 = protocol.refer(IHelloService.class, mockUrl);
         invokers.add(mInvoker1);
 
-        //方法配置了mock
+        //Configured with mock
         RpcInvocation invocation = new RpcInvocation();
         invocation.setMethodName("getSomething");
         Result ret = cluster.invoke(invocation);
         Assert.assertEquals("aa", ret.getValue());
 
-        //如果没有配置mock，则直接返回null
+        // If no mock was configured, return null directly
         invocation = new RpcInvocation();
         invocation.setMethodName("getSomething2");
         ret = cluster.invoke(invocation);
         Assert.assertEquals(null, ret.getValue());
 
-        //如果没有配置mock，则直接返回null
+        // If no mock was configured, return null directly
         invocation = new RpcInvocation();
         invocation.setMethodName("sayHello");
         ret = cluster.invoke(invocation);
@@ -152,7 +168,7 @@ public class MockClusterInvokerTest {
     }
 
     /**
-     * 测试mock策略是否正常-fail-mock
+     * Test if mock policy works fine: fail-mock
      */
     @Test
     public void testMockInvokerFromOverride_Invoke_Fock_someMethods() {
@@ -160,25 +176,25 @@ public class MockClusterInvokerTest {
                 .addParameter("getSomething.mock", "fail:return x")
                 .addParameter("getSomething2.mock", "force:return y");
         Invoker<IHelloService> cluster = getClusterInvoker(url);
-        //方法配置了mock
+        //Configured with mock
         RpcInvocation invocation = new RpcInvocation();
         invocation.setMethodName("getSomething");
         Result ret = cluster.invoke(invocation);
         Assert.assertEquals("something", ret.getValue());
 
-        //如果没有配置mock，则直接返回null
+        // If no mock was configured, return null directly
         invocation = new RpcInvocation();
         invocation.setMethodName("getSomething2");
         ret = cluster.invoke(invocation);
         Assert.assertEquals("y", ret.getValue());
 
-        //如果没有配置mock，则直接返回null
+        // If no mock was configured, return null directly
         invocation = new RpcInvocation();
         invocation.setMethodName("getSomething3");
         ret = cluster.invoke(invocation);
         Assert.assertEquals("something3", ret.getValue());
 
-        //如果没有配置mock，则直接返回null
+        // If no mock was configured, return null directly
         invocation = new RpcInvocation();
         invocation.setMethodName("sayHello");
         ret = cluster.invoke(invocation);
@@ -186,7 +202,7 @@ public class MockClusterInvokerTest {
     }
 
     /**
-     * 测试mock策略是否正常-fail-mock
+     * Test if mock policy works fine: fail-mock
      */
     @Test
     public void testMockInvokerFromOverride_Invoke_Fock_WithOutDefault() {
@@ -195,19 +211,19 @@ public class MockClusterInvokerTest {
                 .addParameter("getSomething2.mock", "force:return y")
                 .addParameter("invoke_return_error", "true");
         Invoker<IHelloService> cluster = getClusterInvoker(url);
-        //方法配置了mock
+        //Configured with mock
         RpcInvocation invocation = new RpcInvocation();
         invocation.setMethodName("getSomething");
         Result ret = cluster.invoke(invocation);
         Assert.assertEquals("x", ret.getValue());
 
-        //如果没有配置mock，则直接返回null
+        // If no mock was configured, return null directly
         invocation = new RpcInvocation();
         invocation.setMethodName("getSomething2");
         ret = cluster.invoke(invocation);
         Assert.assertEquals("y", ret.getValue());
 
-        //如果没有配置mock，则直接返回null
+        // If no mock was configured, return null directly
         invocation = new RpcInvocation();
         invocation.setMethodName("getSomething3");
         try {
@@ -219,7 +235,7 @@ public class MockClusterInvokerTest {
     }
 
     /**
-     * 测试mock策略是否正常-fail-mock
+     * Test if mock policy works fine: fail-mock
      */
     @Test
     public void testMockInvokerFromOverride_Invoke_Fock_WithDefault() {
@@ -229,25 +245,25 @@ public class MockClusterInvokerTest {
                 .addParameter("getSomething2.mock", "force:return y")
                 .addParameter("invoke_return_error", "true");
         Invoker<IHelloService> cluster = getClusterInvoker(url);
-        //方法配置了mock
+        //Configured with mock
         RpcInvocation invocation = new RpcInvocation();
         invocation.setMethodName("getSomething");
         Result ret = cluster.invoke(invocation);
         Assert.assertEquals("x", ret.getValue());
 
-        //如果没有配置mock，则直接返回null
+        // If no mock was configured, return null directly
         invocation = new RpcInvocation();
         invocation.setMethodName("getSomething2");
         ret = cluster.invoke(invocation);
         Assert.assertEquals("y", ret.getValue());
 
-        //如果没有配置mock，则直接返回null
+        // If no mock was configured, return null directly
         invocation = new RpcInvocation();
         invocation.setMethodName("getSomething3");
         ret = cluster.invoke(invocation);
         Assert.assertEquals(null, ret.getValue());
 
-        //如果没有配置mock，则直接返回null
+        // If no mock was configured, return null directly
         invocation = new RpcInvocation();
         invocation.setMethodName("sayHello");
         ret = cluster.invoke(invocation);
@@ -255,7 +271,7 @@ public class MockClusterInvokerTest {
     }
 
     /**
-     * 测试mock策略是否正常-fail-mock
+     * Test if mock policy works fine: fail-mock
      */
     @Test
     public void testMockInvokerFromOverride_Invoke_Fock_WithFailDefault() {
@@ -265,25 +281,25 @@ public class MockClusterInvokerTest {
                 .addParameter("getSomething2.mock", "force:return y")
                 .addParameter("invoke_return_error", "true");
         Invoker<IHelloService> cluster = getClusterInvoker(url);
-        //方法配置了mock
+        //Configured with mock
         RpcInvocation invocation = new RpcInvocation();
         invocation.setMethodName("getSomething");
         Result ret = cluster.invoke(invocation);
         Assert.assertEquals("x", ret.getValue());
 
-        //如果没有配置mock，则直接返回null
+        // If no mock was configured, return null directly
         invocation = new RpcInvocation();
         invocation.setMethodName("getSomething2");
         ret = cluster.invoke(invocation);
         Assert.assertEquals("y", ret.getValue());
 
-        //如果没有配置mock，则直接返回null
+        // If no mock was configured, return null directly
         invocation = new RpcInvocation();
         invocation.setMethodName("getSomething3");
         ret = cluster.invoke(invocation);
         Assert.assertEquals("z", ret.getValue());
 
-        //如果没有配置mock，则直接返回null
+        //If no mock was configured, return null directly
         invocation = new RpcInvocation();
         invocation.setMethodName("sayHello");
         ret = cluster.invoke(invocation);
@@ -291,7 +307,7 @@ public class MockClusterInvokerTest {
     }
 
     /**
-     * 测试mock策略是否正常-fail-mock
+     * Test if mock policy works fine: fail-mock
      */
     @Test
     public void testMockInvokerFromOverride_Invoke_Fock_WithForceDefault() {
@@ -301,25 +317,25 @@ public class MockClusterInvokerTest {
                 .addParameter("getSomething2.mock", "force:return y")
                 .addParameter("invoke_return_error", "true");
         Invoker<IHelloService> cluster = getClusterInvoker(url);
-        //方法配置了mock
+        //Configured with mock
         RpcInvocation invocation = new RpcInvocation();
         invocation.setMethodName("getSomething");
         Result ret = cluster.invoke(invocation);
         Assert.assertEquals("x", ret.getValue());
 
-        //如果没有配置mock，则直接返回null
+        //If no mock was configured, return null directly
         invocation = new RpcInvocation();
         invocation.setMethodName("getSomething2");
         ret = cluster.invoke(invocation);
         Assert.assertEquals("y", ret.getValue());
 
-        //如果没有配置mock，则直接返回null
+        //If no mock was configured, return null directly
         invocation = new RpcInvocation();
         invocation.setMethodName("getSomething3");
         ret = cluster.invoke(invocation);
         Assert.assertEquals("z", ret.getValue());
 
-        //如果没有配置mock，则直接返回null
+        //If no mock was configured, return null directly
         invocation = new RpcInvocation();
         invocation.setMethodName("sayHello");
         ret = cluster.invoke(invocation);
@@ -327,7 +343,7 @@ public class MockClusterInvokerTest {
     }
 
     /**
-     * 测试mock策略是否正常-fail-mock
+     * Test if mock policy works fine: fail-mock
      */
     @Test
     public void testMockInvokerFromOverride_Invoke_Fock_Default() {
@@ -335,20 +351,20 @@ public class MockClusterInvokerTest {
                 .addParameter("mock", "fail:return x")
                 .addParameter("invoke_return_error", "true");
         Invoker<IHelloService> cluster = getClusterInvoker(url);
-        //方法配置了mock
+        //Configured with mock
         RpcInvocation invocation = new RpcInvocation();
         invocation.setMethodName("getSomething");
         Result ret = cluster.invoke(invocation);
         Assert.assertEquals("x", ret.getValue());
 
-        //如果没有配置mock，则直接返回null
+        //If no mock was configured, return null directly
         invocation = new RpcInvocation();
         invocation.setMethodName("getSomething2");
         ret = cluster.invoke(invocation);
         Assert.assertEquals("x", ret.getValue());
 
         //如d
-        //如果没有配置mock，则直接返回null
+        //If no mock was configured, return null directly
         invocation = new RpcInvocation();
         invocation.setMethodName("sayHello");
         ret = cluster.invoke(invocation);
@@ -356,7 +372,7 @@ public class MockClusterInvokerTest {
     }
 
     /**
-     * 测试mock策略是否正常-fail-mock
+     * Test if mock policy works fine: fail-mock
      */
     @Test
     public void testMockInvokerFromOverride_Invoke_checkCompatible_return() {
@@ -364,13 +380,13 @@ public class MockClusterInvokerTest {
                 .addParameter("getSomething.mock", "return x")
                 .addParameter("invoke_return_error", "true");
         Invoker<IHelloService> cluster = getClusterInvoker(url);
-        //方法配置了mock
+        //Configured with mock
         RpcInvocation invocation = new RpcInvocation();
         invocation.setMethodName("getSomething");
         Result ret = cluster.invoke(invocation);
         Assert.assertEquals("x", ret.getValue());
 
-        //如果没有配置mock，则直接返回null
+        //If no mock was configured, return null directly
         invocation = new RpcInvocation();
         invocation.setMethodName("getSomething3");
         try {
@@ -382,7 +398,7 @@ public class MockClusterInvokerTest {
     }
 
     /**
-     * 测试mock策略是否正常-fail-mock
+     * Test if mock policy works fine: fail-mock
      */
     @Test
     public void testMockInvokerFromOverride_Invoke_checkCompatible_ImplMock() {
@@ -390,7 +406,7 @@ public class MockClusterInvokerTest {
                 .addParameter("mock", "true")
                 .addParameter("invoke_return_error", "true");
         Invoker<IHelloService> cluster = getClusterInvoker(url);
-        //方法配置了mock
+        //Configured with mock
         RpcInvocation invocation = new RpcInvocation();
         invocation.setMethodName("getSomething");
         Result ret = cluster.invoke(invocation);
@@ -398,7 +414,7 @@ public class MockClusterInvokerTest {
     }
 
     /**
-     * 测试mock策略是否正常-fail-mock
+     * Test if mock policy works fine: fail-mock
      */
     @Test
     public void testMockInvokerFromOverride_Invoke_checkCompatible_ImplMock2() {
@@ -406,7 +422,7 @@ public class MockClusterInvokerTest {
                 .addParameter("mock", "fail")
                 .addParameter("invoke_return_error", "true");
         Invoker<IHelloService> cluster = getClusterInvoker(url);
-        //方法配置了mock
+        //Configured with mock
         RpcInvocation invocation = new RpcInvocation();
         invocation.setMethodName("getSomething");
         Result ret = cluster.invoke(invocation);
@@ -414,14 +430,14 @@ public class MockClusterInvokerTest {
     }
 
     /**
-     * 测试mock策略是否正常-fail-mock
+     * Test if mock policy works fine: fail-mock
      */
     @Test
     public void testMockInvokerFromOverride_Invoke_checkCompatible_ImplMock3() {
         URL url = URL.valueOf("remote://1.2.3.4/" + IHelloService.class.getName())
                 .addParameter("mock", "force");
         Invoker<IHelloService> cluster = getClusterInvoker(url);
-        //方法配置了mock
+        //Configured with mock
         RpcInvocation invocation = new RpcInvocation();
         invocation.setMethodName("getSomething");
         Result ret = cluster.invoke(invocation);
@@ -434,7 +450,7 @@ public class MockClusterInvokerTest {
                 .addParameter("getSomething.mock", "force:return 1688")
                 .addParameter("invoke_return_error", "true");
         Invoker<IHelloService> cluster = getClusterInvoker(url);
-        //方法配置了mock
+        //Configured with mock
         RpcInvocation invocation = new RpcInvocation();
         invocation.setMethodName("getSomething");
         Result ret = cluster.invoke(invocation);
@@ -448,7 +464,7 @@ public class MockClusterInvokerTest {
                 .addParameter("getInt1.mock", "force:return 1688")
                 .addParameter("invoke_return_error", "true");
         Invoker<IHelloService> cluster = getClusterInvoker(url);
-        //方法配置了mock
+        //Configured with mock
         RpcInvocation invocation = new RpcInvocation();
         invocation.setMethodName("getInt1");
         Result ret = cluster.invoke(invocation);
@@ -462,7 +478,7 @@ public class MockClusterInvokerTest {
                 .addParameter("getBoolean1.mock", "force:return true")
                 .addParameter("invoke_return_error", "true");
         Invoker<IHelloService> cluster = getClusterInvoker(url);
-        //方法配置了mock
+        //Configured with mock
         RpcInvocation invocation = new RpcInvocation();
         invocation.setMethodName("getBoolean1");
         Result ret = cluster.invoke(invocation);
@@ -476,7 +492,7 @@ public class MockClusterInvokerTest {
                 .addParameter("getBoolean2.mock", "force:return true")
                 .addParameter("invoke_return_error", "true");
         Invoker<IHelloService> cluster = getClusterInvoker(url);
-        //方法配置了mock
+        //Configured with mock
         RpcInvocation invocation = new RpcInvocation();
         invocation.setMethodName("getBoolean2");
         Result ret = cluster.invoke(invocation);
@@ -490,7 +506,7 @@ public class MockClusterInvokerTest {
                 .addParameter("getListString.mock", "force:return empty")
                 .addParameter("invoke_return_error", "true");
         Invoker<IHelloService> cluster = getClusterInvoker(url);
-        //方法配置了mock
+        //Configured with mock
         RpcInvocation invocation = new RpcInvocation();
         invocation.setMethodName("getListString");
         Result ret = cluster.invoke(invocation);
@@ -504,7 +520,7 @@ public class MockClusterInvokerTest {
                 .addParameter("getListString.mock", "force:return [\"hi\",\"hi2\"]")
                 .addParameter("invoke_return_error", "true");
         Invoker<IHelloService> cluster = getClusterInvoker(url);
-        //方法配置了mock
+        //Configured with mock
         RpcInvocation invocation = new RpcInvocation();
         invocation.setMethodName("getListString");
         Result ret = cluster.invoke(invocation);
@@ -520,7 +536,7 @@ public class MockClusterInvokerTest {
                 .addParameter("getUsers.mock", "force:return empty")
                 .addParameter("invoke_return_error", "true");
         Invoker<IHelloService> cluster = getClusterInvoker(url);
-        //方法配置了mock
+        //Configured with mock
         RpcInvocation invocation = new RpcInvocation();
         invocation.setMethodName("getUsers");
         Result ret = cluster.invoke(invocation);
@@ -534,7 +550,7 @@ public class MockClusterInvokerTest {
                 .addParameter("getUsers.mock", "force:return [{id:1, name:\"hi1\"}, {id:2, name:\"hi2\"}]")
                 .addParameter("invoke_return_error", "true");
         Invoker<IHelloService> cluster = getClusterInvoker(url);
-        //方法配置了mock
+        //Configured with mock
         RpcInvocation invocation = new RpcInvocation();
         invocation.setMethodName("getUsers");
         Result ret = cluster.invoke(invocation);
@@ -550,7 +566,7 @@ public class MockClusterInvokerTest {
                 .addParameter("getUsers.mock", "force:return [{id:x, name:\"hi1\"}]")
                 .addParameter("invoke_return_error", "true");
         Invoker<IHelloService> cluster = getClusterInvoker(url);
-        //方法配置了mock
+        //Configured with mock
         RpcInvocation invocation = new RpcInvocation();
         invocation.setMethodName("getUsers");
         try {
@@ -565,7 +581,7 @@ public class MockClusterInvokerTest {
                 .addParameter("getBoolean2.mock", "force:throw ")
                 .addParameter("invoke_return_error", "true");
         Invoker<IHelloService> cluster = getClusterInvoker(url);
-        //方法配置了mock
+        //Configured with mock
         RpcInvocation invocation = new RpcInvocation();
         invocation.setMethodName("getBoolean2");
         try {
@@ -582,7 +598,7 @@ public class MockClusterInvokerTest {
                 .addParameter("getBoolean2.mock", "force:throw com.alibaba.dubbo.rpc.cluster.support.wrapper.MyMockException")
                 .addParameter("invoke_return_error", "true");
         Invoker<IHelloService> cluster = getClusterInvoker(url);
-        //方法配置了mock
+        //Configured with mock
         RpcInvocation invocation = new RpcInvocation();
         invocation.setMethodName("getBoolean2");
         try {
@@ -599,7 +615,7 @@ public class MockClusterInvokerTest {
                 .addParameter("getBoolean2.mock", "force:throw java.lang.RuntimeException2")
                 .addParameter("invoke_return_error", "true");
         Invoker<IHelloService> cluster = getClusterInvoker(url);
-        //方法配置了mock
+        //Configured with mock
         RpcInvocation invocation = new RpcInvocation();
         invocation.setMethodName("getBoolean2");
         try {
@@ -616,7 +632,7 @@ public class MockClusterInvokerTest {
                 .addParameter("mock", "false")
                 .addParameter("invoke_return_error", "true");
         Invoker<IHelloService> cluster = getClusterInvoker(url);
-        //方法配置了mock
+        //Configured with mock
         RpcInvocation invocation = new RpcInvocation();
         invocation.setMethodName("getBoolean2");
         try {
@@ -630,6 +646,7 @@ public class MockClusterInvokerTest {
     @SuppressWarnings({"unchecked", "rawtypes"})
     private Invoker<IHelloService> getClusterInvoker(URL url) {
         //javasssit方式对方法参数类型判断严格,如果invocation数据设置不全，调用会失败.
+        // As `javassist` have a strict restriction of argument types, request will fail if Invocation do not contains complete parameter type information
         final URL durl = url.addParameter("proxy", "jdk");
         invokers.clear();
         ProxyFactory proxy = ExtensionLoader.getExtensionLoader(ProxyFactory.class).getExtension("jdk");
diff --git a/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/support/wrapper/MyMockException.java b/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/support/wrapper/MyMockException.java
index da4faf2dcc..4055a75160 100644
--- a/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/support/wrapper/MyMockException.java
+++ b/dubbo-cluster/src/test/java/com/alibaba/dubbo/rpc/cluster/support/wrapper/MyMockException.java
@@ -1,3 +1,19 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package com.alibaba.dubbo.rpc.cluster.support.wrapper;
 
 
diff --git a/dubbo-cluster/src/test/resources/log4j.xml b/dubbo-cluster/src/test/resources/log4j.xml
index 3ff164ac60..e19a6babe4 100644
--- a/dubbo-cluster/src/test/resources/log4j.xml
+++ b/dubbo-cluster/src/test/resources/log4j.xml
@@ -1,13 +1,14 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!--
- - Copyright 1999-2011 Alibaba Group.
- -  
- - Licensed under the Apache License, Version 2.0 (the "License");
- - you may not use this file except in compliance with the License.
- - You may obtain a copy of the License at
- -  
- -      http://www.apache.org/licenses/LICENSE-2.0
- -  
+ - Licensed to the Apache Software Foundation (ASF) under one or more
+ - contributor license agreements.  See the NOTICE file distributed with
+ - this work for additional information regarding copyright ownership.
+ - The ASF licenses this file to You under the Apache License, Version 2.0
+ - (the "License"); you may not use this file except in compliance with
+ - the License.  You may obtain a copy of the License at
+ -
+ -     http://www.apache.org/licenses/LICENSE-2.0
+ -
  - Unless required by applicable law or agreed to in writing, software
  - distributed under the License is distributed on an "AS IS" BASIS,
  - WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.