[ZEPPELIN-3483] NPE in io.grpc.stub.ClientCalls$StreamObserverToCallListenerAdapter.onClose

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 0.8.0, 0.8.1, 0.9.0
• Component/s: Core

Environment

latest Zeppelin from master snapshot

• Assignee: Unassigned
• Reporter: Ruslan Dautkhanov
• Created: 22/May/18 18:46
• Updated: 23/May/18 16:24

Description

 

zjffdu, looking at the timing and exception stack it seems happens at interpreter restart?

Doesn't seem to break anything, but I figured out I better point this out in case if it can cause any issues.

ERROR [2018-05-22 10:35:33,232] (\{grpc-default-executor-1} SerializingExecutor.java[run]:120) - Exception while executing runnable io.grpc.internal.ClientCallImpl$ClientStreamListenerImpl$1StreamClosed@5793c1b4
java.lang.NullPointerException
 at io.grpc.stub.ClientCalls$StreamObserverToCallListenerAdapter.onClose(ClientCalls.java:395)
 at io.grpc.internal.ClientCallImpl.closeObserver(ClientCallImpl.java:426)
 at io.grpc.internal.ClientCallImpl.access$100(ClientCallImpl.java:76)
 at io.grpc.internal.ClientCallImpl$ClientStreamListenerImpl.close(ClientCallImpl.java:512)
 at io.grpc.internal.ClientCallImpl$ClientStreamListenerImpl.access$700(ClientCallImpl.java:429)
 at io.grpc.internal.ClientCallImpl$ClientStreamListenerImpl$1StreamClosed.runInContext(ClientCallImpl.java:544)
 at io.grpc.internal.ContextRunnable.run(ContextRunnable.java:52)
 at io.grpc.internal.SerializingExecutor.run(SerializingExecutor.java:117)
 at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
 at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
 at java.lang.Thread.run(Thread.java:748)
ERROR [2018-05-22 11:00:46,949] (\{grpc-default-executor-1} SerializingExecutor.java[run]:120) - Exception while executing runnable io.grpc.internal.ClientCallImpl$ClientStreamListenerImpl$1StreamClosed@485a4f69
java.lang.NullPointerException
 at io.grpc.stub.ClientCalls$StreamObserverToCallListenerAdapter.onClose(ClientCalls.java:395)
 at io.grpc.internal.ClientCallImpl.closeObserver(ClientCallImpl.java:426)
 at io.grpc.internal.ClientCallImpl.access$100(ClientCallImpl.java:76)
 at io.grpc.internal.ClientCallImpl$ClientStreamListenerImpl.close(ClientCallImpl.java:512)
 at io.grpc.internal.ClientCallImpl$ClientStreamListenerImpl.access$700(ClientCallImpl.java:429)
 at io.grpc.internal.ClientCallImpl$ClientStreamListenerImpl$1StreamClosed.runInContext(ClientCallImpl.java:544)
 at io.grpc.internal.ContextRunnable.run(ContextRunnable.java:52)
 at io.grpc.internal.SerializingExecutor.run(SerializingExecutor.java:117)
 at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
 at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
 at java.lang.Thread.run(Thread.java:748)