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Merge pull request #606 from LgbDemo/dev 

double check 变量需要volatile修饰
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easyscheduler 2019-07-23 17:00:33 +08:00 committed by GitHub
parent c3065e416d 6493c9a6b8
commit bb00a6d206
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1 changed files with 10 additions and 4 deletions
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14
escheduler-common/src/main/java/cn/escheduler/common/queue/TaskQueueZkImpl.java
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@ -17,20 +17,26 @@
package cn.escheduler.common.queue;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Comparator;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Set;
import java.util.TreeSet;
import cn.escheduler.common.Constants;
import cn.escheduler.common.utils.Bytes;
import cn.escheduler.common.utils.IpUtils;
import cn.escheduler.common.utils.OSUtils;
import cn.escheduler.common.zk.AbstractZKClient;
import org.apache.commons.lang3.StringUtils;
import org.apache.curator.framework.CuratorFramework;
import org.apache.zookeeper.CreateMode;
import org.apache.zookeeper.data.Stat;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.*;
/**
* A singleton of a task queue implemented with zookeeper
* tasks queue implemention
@ -39,7 +45,7 @@ public class TaskQueueZkImpl extends AbstractZKClient implements ITaskQueue {
private static final Logger logger = LoggerFactory.getLogger(TaskQueueZkImpl.class);
private static TaskQueueZkImpl instance;
private static volatile TaskQueueZkImpl instance;
private TaskQueueZkImpl(){
init();