The 2020-06-26 12:15:40. 7756-365 WARN [extShutdownHook] O.A.D.R.I ntegration. RegistryProtocol: [DUBBO] unsubscribe listener==null, DUBBO version: 2.7.6, current host: 192.168.164.161
Java. Lang. IllegalArgumentException: unsubscribe listener==null
The at org. Apache. Dubbo. Registry. Support. AbstractRegistry. Unsubscribe (AbstractRegistry. Java: 325) ~ [dubbo - 2.7.6. Jar: 2.7.6]
The at org. Apache. Dubbo. Registry. Support. FailbackRegistry. Unsubscribe (FailbackRegistry. Java: 329) ~ [dubbo - 2.7.6. Jar: 2.7.6]
The at org. Apache. Dubbo. Registry. ListenerRegistryWrapper. Unsubscribe (ListenerRegistryWrapper. Java: 129) ~ [dubbo - 2.7.6. Jar: 2.7.6]
The at org. Apache. Dubbo. Registry. Integration. RegistryProtocol $ExporterChangeableWrapper. Unexport (RegistryProtocol. Java: 735) ~ [dubbo - 2.7.6. Jar: 2.7.6]
The at org. Apache. Dubbo. Registry. Integration. RegistryProtocol $DestroyableExporter. Unexport (RegistryProtocol. Java: 554) [dubbo - 2.7.6. Jar: 2.7.6]
The at org. Apache. Dubbo. Config. ServiceConfig. Unexport (ServiceConfig. Java: 170) [dubbo - 2.7.6. Jar: 2.7.6]
At com. Alibaba. Cloud. Dubbo. Service. DubboMetadataServiceExporter. Unexport (DubboMetadataServiceExporter. Java: 103) [spring - the cloud - starter - dubbo - 2.2.1. The jar: 2.2.1. RELEASE]
At com. Alibaba. Cloud. Dubbo. Autoconfigure. DubboMetadataAutoConfiguration. UnExportDubboMetadataConfigService (DubboMetadataAutoConfiguration. Java: 118) [spring - the cloud - starter - dubbo - 2.2.1. The jar: 2.2.1. RELEASE]
At com. Alibaba. Cloud. Dubbo. Autoconfigure. DubboMetadataAutoConfiguration. OnContextClosed (DubboMetadataAutoConfiguration. Java: 109) [spring - the cloud - starter - dubbo - 2.2.1. The jar: 2.2.1. RELEASE]
At sun. Reflect. NativeMethodAccessorImpl. Invoke0 (Native Method) ~ [na: 1.8.0 comes with _191]
At sun. Reflect. NativeMethodAccessorImpl. Invoke (NativeMethodAccessorImpl. Java: 62) ~ [na: 1.8.0 comes with _191]
At sun. Reflect. DelegatingMethodAccessorImpl. Invoke (43) DelegatingMethodAccessorImpl. Java: ~ [na: 1.8.0 comes with _191]
The at Java. Lang. Reflect. Method. Invoke (498) Method. The Java: ~ [na: 1.8.0 comes with _191]
The at org. Springframework. Context. Event. ApplicationListenerMethodAdapter. DoInvoke (ApplicationListenerMethodAdapter. Java: 305) [spring - the context - 5.2.6. The jar: 5.2.6. RELEASE]
The at org. Springframework. Context. Event. ApplicationListenerMethodAdapter. The processEvent (ApplicationListenerMethodAdapter. Java: 190) [spring - the context - 5.2.6. The jar: 5.2.6. RELEASE]
The at org. Springframework. Context. Event. ApplicationListenerMethodAdapter. OnApplicationEvent (ApplicationListenerMethodAdapter. Java: 153) [spring - the context - 5.2.6. The jar: 5.2.6. RELEASE]
The at org. Springframework. Context. Event. SimpleApplicationEventMulticaster. DoInvokeListener (SimpleApplicationEventMulticaster. Java: 172) [spring - the context - 5.2.6. The jar: 5.2.6. RELEASE]
The at org. Springframework. Context. Event. SimpleApplicationEventMulticaster. InvokeListener (SimpleApplicationEventMulticaster. Java: 165) [spring - the context - 5.2.6. The jar: 5.2.6. RELEASE]
The at org. Springframework. Context. Event. SimpleApplicationEventMulticaster. MulticastEvent (SimpleApplicationEventMulticaster. Java: 139) [spring - the context - 5.2.6. The jar: 5.2.6. RELEASE]
The at org. Springframework. Context. Support. AbstractApplicationContext. PublishEvent (AbstractApplicationContext. Java: 403) [spring - the context - 5.2.6. The jar: 5.2.6. RELEASE]
The at org. Springframework. Context. Support. AbstractApplicationContext. PublishEvent (AbstractApplicationContext. Java: 360) [spring - the context - 5.2.6. The jar: 5.2.6. RELEASE]
The at org. Springframework. Context. Support. AbstractApplicationContext. DoClose (AbstractApplicationContext. Java: 1012) [spring - the context - 5.2.6. The jar: 5.2.6. RELEASE]
The at org. Springframework. Context. Support. AbstractApplicationContext $1. The run (AbstractApplicationContext. Java: 948) [spring - the context - 5.2.6. The jar: 5.2.6. RELEASE]
12:15:40 2020-06-26. 7756-372 the INFO/extShutdownHook O.A.D.R PC. The protocol. The dubbo. DubboProtocol: [dubbo] Close dubbo server:/10.0.75.1:20880, dubbo version: 2.7.6, current host: 192.168.164.161
The Exception in the thread "DubboShutdownHook" Java. Lang. RuntimeException: Java. Util. ConcurrentModificationException
At org.apache.dubbo.com, mon. Function. ThrowableAction. Execute (ThrowableAction. Java: 48)
At org.apache.dubbo.com, mon. Lang. ShutdownHookCallbacks. Lambda $callback $0 (70) ShutdownHookCallbacks. Java:
The at Java. Lang. Iterable. ForEach (Iterable. Java: 75)
At org.apache.dubbo.com, mon. Lang. ShutdownHookCallbacks. Callback (ShutdownHookCallbacks. Java: 70)
At org. Apache. Dubbo. Config. DubboShutdownHook. Callback (DubboShutdownHook. Java: 85)
The at org. Apache. Dubbo. Config. DubboShutdownHook. Run (DubboShutdownHook. Java: 73)
Under Caused by: Java. Util. ConcurrentModificationException
The at Java. Util. HashMap $HashIterator. NextNode (HashMap. Java: 1442)
The at Java. Util. HashMap $ValueIterator. Next (HashMap. Java: 1471)
At Java. Util. Collections $UnmodifiableCollection $1. The next (1042) Collections. Java:
nullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnull
