Returning gRPC response results in random stream error

[sishbi]

Version

5.0.4

Context

We have just upgraded to vertx 5.0.4 using the GrpcIoServer
And we see this for quite a few requests:

java.lang.IllegalStateException: The stream is failed: INTERNAL
	at io.vertx.grpc.common.impl.GrpcWriteStreamBase.writeMessage(GrpcWriteStreamBase.java:214)
	at io.vertx.grpc.server.impl.GrpcServerResponseImpl.writeMessage(GrpcServerResponseImpl.java:214)
	at io.vertx.grpc.common.impl.GrpcWriteStreamBase.endMessage(GrpcWriteStreamBase.java:179)
	at io.vertx.grpc.common.impl.GrpcWriteStreamBase.end(GrpcWriteStreamBase.java:161)

We thought it was for responses that were streaming but we also see it for unary responses.
For now I am reverting back to the previous vertx version - I don't know what would cause this issue.

Steps to reproduce

1. create a gRPC server
2. return a response
3. encounter the error

Do you have a reproducer?

No response

[vietj]

@sishbi could you provide a reproducer ?

[sishbi]

@sishbi could you provide a reproducer ?

I would really like to, but as this only seems to happen in a deployed environment I am not sure that will be easy.
Related to this I have seen many test failures due to HTTP2 GOAWAY returned from the test server, it seems it closes the http connection before the client has read the response so it may be related.
But this specific error has not been seen in a unit test.