[GitHub] [servicecomb-pack] WillemJiang commented on issue #418: o.a.s.p.o.c.g.c.ReconnectStreamObserver : Failed to process grpc coordinate command.

[GitBox <gi...@apache.org>]

WillemJiang commented on issue #418: o.a.s.p.o.c.g.c.ReconnectStreamObserver  : Failed to process grpc coordinate command.
URL: https://github.com/apache/servicecomb-pack/issues/418#issuecomment-469511472
 
 
   Hi,
   
   Thx for report the issue, The omega-transport-feign issue had been fixed in #376 [SCB-1110](https://issues.apache.org/jira/browse/SCB-1110). 
   For the stack trace I found there is an import information，which looks like the omega has some trouble to process the command message from Alpha. 
   
   ```
   Caused by: java.lang.NullPointerException: null
   at org.apache.servicecomb.pack.omega.context.CallbackContext$CallbackContextInternal.access$200(CallbackContext.java:63)
   at org.apache.servicecomb.pack.omega.context.CallbackContext.apply(CallbackContext.java:50)
   at org.apache.servicecomb.pack.omega.transaction.CompensationMessageHandler.onReceive(CompensationMessageHandler.java:35)
   at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
   at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
   at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
   at java.lang.reflect.Method.invoke(Method.java:498)
   at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:333)
   at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:207)
   at com.sun.proxy.$Proxy111.onReceive(Unknown Source)
   at org.apache.servicecomb.pack.omega.connector.grpc.saga.GrpcCompensateStreamObserver.onNext(GrpcCompensateStreamObserver.java:52)
   at org.apache.servicecomb.pack.omega.connector.grpc.saga.GrpcCompensateStreamObserver.onNext(GrpcCompensateStreamObserver.java:31)
   at io.grpc.stub.ClientCalls$StreamObserverToCallListenerAdapter.onMessage(ClientCalls.java:407)
   at io.grpc.ForwardingClientCallListener.onMessage(ForwardingClientCallListener.java:33)
   at io.grpc.ForwardingClientCallListener.onMessage(ForwardingClientCallListener.java:33)
   at io.grpc.internal.ClientCallImpl$ClientStreamListenerImpl$1MessagesAvailable.runInContext(ClientCallImpl.java:519)
   ... 5 common frames omitted
   ```
   You may take a look at this [FAQ](https://github.com/apache/servicecomb-pack/blob/master/docs/faq/en/omega-cannot-run-command-from-alpha.md) to check if you have the same trouble here.

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