Github user zsxwing commented on the pull request:
https://github.com/apache/spark/pull/12481#issuecomment-211619642
> WARN Dispatcher: Message
RemoteProcessDisconnected(oc7258617548.ibm.com:7077) dropped. RpcEnv already
stopped.
Yep, Netty may emit the network events after RpcEnv stops. But it doesn't
matter since there are only a few warning logs.
> 16/04/18 14:55:57 ERROR WorkerWatcher: Lost connection to worker rpc
endpoint spark://[email protected]:39166. Exiting.
Was the worker stopped at the same time? If the connection does disconnect
before `dispatcher.stop`, this could happen.
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