[GitHub] jackychee opened a new issue #985: grpc-1.x-plugin throw ClassCastException in gRPC-java v1.10.0

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

jackychee opened a new issue #985: grpc-1.x-plugin throw ClassCastException in gRPC-java v1.10.0
URL: https://github.com/apache/incubator-skywalking/issues/985
 
 
   Please answer these questions before submitting your issue.
   
   - Why do you submit this issue?
   - [ ] Question or discussion
   - [x] Bug
   - [ ] Requirement
   - [ ] Feature or performance improvement
   
   ___
   ### Question
   - What do you want to know?
   
   ___
   ### Bug
   - Which version of SkyWalking, OS and JRE?
   SkyWalking5.0.0-alpha
   
   - Which company or project?
   
   - What happen?
   
   In gRPC-java v1.10.0, gRPC framework will wrap ClientCallImpl before giving it back to ManagedChannelImpl's newCall method, so in SkyWalking's ManagedChannelInterceptor's afterMethod，we get a wrapped ClientCallImpl, which is not an EnhancedInstance instance. 
   Also, gRPC framework will wrap ClientCall.Listener instance before giving it back to real ClientCallImpl's start method.
   
   Error logs as below.
   
   ERROR 2018-03-24 11:48:38 InstMethodsInter :  class[class io.grpc.internal.ManagedChannelImpl] after method[newCall] intercept failure 
   java.lang.ClassCastException: io.grpc.internal.CensusStatsModule$StatsClientInterceptor$1 cannot be cast to org.apache.skywalking.apm.agent.core.plugin.interceptor.enhance.EnhancedInstance
   	at org.apache.skywalking.apm.plugin.grpc.v1.ManagedChannelInterceptor.afterMethod(ManagedChannelInterceptor.java:46)
   	at org.apache.skywalking.apm.agent.core.plugin.interceptor.enhance.InstMethodsInter.intercept(InstMethodsInter.java:105)
   	at io.grpc.internal.ManagedChannelImpl.newCall(ManagedChannelImpl.java)
   	at io.grpc.stub.ClientCalls.blockingUnaryCall$original$mSPjc7Ob(ClientCalls.java:117)
   	at io.grpc.stub.ClientCalls.blockingUnaryCall$original$mSPjc7Ob$accessor$FzAWtERM(ClientCalls.java)
   	at io.grpc.stub.ClientCalls$auxiliary$5f2iLj6c.call(Unknown Source)
   	at org.apache.skywalking.apm.agent.core.plugin.interceptor.enhance.StaticMethodsInter.intercept(StaticMethodsInter.java:86)
   	at io.grpc.stub.ClientCalls.blockingUnaryCall(ClientCalls.java)
   	at io.grpc.examples.routeguide.RouteGuideGrpc$RouteGuideBlockingStub.getFeature(RouteGuideGrpc.java:404)
   	at io.grpc.examples.routeguide.RouteGuideClient.getFeature(RouteGuideClient.java:76)
   	at io.grpc.examples.routeguide.RouteGuideClient.main(RouteGuideClient.java:264)
   
   
   ___
   ### Requirement or improvement
   - Please describe about your requirements or improvement suggestions.

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