[Bug] GRPC serverSide java.lang.IllegalArgumentException: ContextSnapshot can't be null.

[MrCoderYu]

Search before asking

• I had searched in the issues and found no similar issues.

Apache SkyWalking Component

Java Agent (apache/skywalking-java)

What happened

grpc serverSide occurs 'java.lang.IllegalArgumentException: ContextSnapshot can't be null.' when using ThreadPoolTaskExecutor

What you expected to happen

Compatible with GRPC interface using thread pool mode

How to reproduce

@Override
public void grpcMethod(Request request, StreamObserver<Response> responseObserver) {
    CompletableFuture.runAsync(() -> {
        // ...bizCode
    }, userRequestHandleTaskExecutor);
}

Anything else

V 9.3.0
TracingServerCall:ContextManager.continued(ServerInterceptor.CONTEXT_SNAPSHOT_KEY.get());

Are you willing to submit a pull request to fix on your own?

• Yes I am willing to submit a pull request on my own!

Code of Conduct

• I agree to follow this project's Code of Conduct

[wu-sheng]

You could check test scenarios in the agent projects.
If this case is not verified, then we can't guarantee it works. We may need some relative patches for your scenarios.

[wu-sheng]

As I am not a user for this scenario, either you need to learn source codes and debug, or you have to wait for others to step in.

[hzihui]

I have also encountered this problem. The 'close' method of 'TraceServerCall' is null when obtaining 'ContextSnapshot' data through 'Context. Key'. The reason is that 'Grpc Context' uses ThreadLocal. Can you provide a temporary solution?

[wu-sheng]

Until there is a new plugin, you have to remove the grpc plugin, and accept the tracing will be broken by this.

[hzihui]

Is there currently a plan to fix this issue?

[wu-sheng]

SkyWalking community relies on everyone as volunteers to fix this. There is no plan if you mean me.

[hzihui]

Okay, thank you. I'll try to solve this problem