java.lang.IllegalStateException: Listener is still attached to activeTransport. Seems transportTerminated was not called.
	 at com.google.common.base.Preconditions.checkState(SourceFile:173)
	 at io.grpc.internal.TransportSet$TransportListener.transportTerminated(SourceFile:391)
	 at io.grpc.okhttp.OkHttpClientTransport$ClientFrameHandler.run(SourceFile:647)
	 at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
	 at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
	 at java.lang.Thread.run(Thread.java:818)