From 70660cb9697fac3c48bcfad0f80dff7d09dbc05c Mon Sep 17 00:00:00 2001
From: pandaapo <35672972+pandaapo@users.noreply.github.com>
Date: Wed, 9 Nov 2022 10:08:03 +0800
Subject: [PATCH] fix issue: unexport() throws NPE when register fail. (#10893)

---
 .../apache/dubbo/registry/integration/RegistryProtocol.java | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/dubbo-registry/dubbo-registry-api/src/main/java/org/apache/dubbo/registry/integration/RegistryProtocol.java b/dubbo-registry/dubbo-registry-api/src/main/java/org/apache/dubbo/registry/integration/RegistryProtocol.java
index 6a8449eac2..a993d8e35d 100644
--- a/dubbo-registry/dubbo-registry-api/src/main/java/org/apache/dubbo/registry/integration/RegistryProtocol.java
+++ b/dubbo-registry/dubbo-registry-api/src/main/java/org/apache/dubbo/registry/integration/RegistryProtocol.java
@@ -72,6 +72,7 @@ import static org.apache.dubbo.common.constants.CommonConstants.APPLICATION_KEY;
 import static org.apache.dubbo.common.constants.CommonConstants.CLUSTER_KEY;
 import static org.apache.dubbo.common.constants.CommonConstants.COMMA_SPLIT_PATTERN;
 import static org.apache.dubbo.common.constants.CommonConstants.CONSUMER;
+import static org.apache.dubbo.common.constants.CommonConstants.DEFAULT_SERVER_SHUTDOWN_TIMEOUT;
 import static org.apache.dubbo.common.constants.CommonConstants.DUBBO_VERSION_KEY;
 import static org.apache.dubbo.common.constants.CommonConstants.ENABLED_KEY;
 import static org.apache.dubbo.common.constants.CommonConstants.EXTRA_KEYS_KEY;
@@ -919,7 +920,10 @@ public class RegistryProtocol implements Protocol, ScopeModelAware {
             }
 
             //TODO wait for shutdown timeout is a bit strange
-            int timeout = ConfigurationUtils.getServerShutdownTimeout(subscribeUrl.getScopeModel());
+            int timeout = DEFAULT_SERVER_SHUTDOWN_TIMEOUT;
+            if (subscribeUrl != null) {
+                timeout = ConfigurationUtils.getServerShutdownTimeout(subscribeUrl.getScopeModel());
+            }
             executor.schedule(() -> {
                 try {
                     exporter.unexport();