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https://issues.apache.org/jira/browse/YARN-1965?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Kuhu Shukla updated YARN-1965:
------------------------------
    Attachment: YARN-1965.patch

Fix to log Interrupted Exception in IPC Client as a warning. The current thread 
is interrupted once the Exception is caught. Also, some cleanup code in TestIPC 
is added so that the client executor count is decremented after each test.

> Interrupted exception when closing YarnClient
> ---------------------------------------------
>
>                 Key: YARN-1965
>                 URL: https://issues.apache.org/jira/browse/YARN-1965
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: api
>    Affects Versions: 2.3.0
>            Reporter: Oleg Zhurakousky
>            Assignee: Kuhu Shukla
>            Priority: Minor
>              Labels: newbie
>         Attachments: YARN-1965.patch
>
>
> Its more of a nuisance then a bug, but nevertheless 
> {code}
> 16:16:48,709 ERROR pool-1-thread-1 ipc.Client:195 - Interrupted while waiting 
> for clientExecutorto stop
> java.lang.InterruptedException
>       at 
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2072)
>       at 
> java.util.concurrent.ThreadPoolExecutor.awaitTermination(ThreadPoolExecutor.java:1468)
>       at 
> org.apache.hadoop.ipc.Client$ClientExecutorServiceFactory.unrefAndCleanup(Client.java:191)
>       at org.apache.hadoop.ipc.Client.stop(Client.java:1235)
>       at org.apache.hadoop.ipc.ClientCache.stopClient(ClientCache.java:100)
>       at 
> org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.close(ProtobufRpcEngine.java:251)
>       at org.apache.hadoop.ipc.RPC.stopProxy(RPC.java:626)
>       at 
> org.apache.hadoop.yarn.api.impl.pb.client.ApplicationClientProtocolPBClientImpl.close(ApplicationClientProtocolPBClientImpl.java:112)
>       at org.apache.hadoop.ipc.RPC.stopProxy(RPC.java:621)
>       at 
> org.apache.hadoop.io.retry.DefaultFailoverProxyProvider.close(DefaultFailoverProxyProvider.java:57)
>       at 
> org.apache.hadoop.io.retry.RetryInvocationHandler.close(RetryInvocationHandler.java:206)
>       at org.apache.hadoop.ipc.RPC.stopProxy(RPC.java:626)
>       at 
> org.apache.hadoop.yarn.client.api.impl.YarnClientImpl.serviceStop(YarnClientImpl.java:124)
>       at 
> org.apache.hadoop.service.AbstractService.stop(AbstractService.java:221)
> . . .
> {code}
> It happens sporadically when stopping YarnClient. 
> Looking at the code in Client's 'unrefAndCleanup' its not immediately obvious 
> why and who throws the interrupt but in any event it should not be logged as 
> ERROR. Probably a WARN with no stack trace.
> Also, for consistency and correctness you may want to Interrupt current 
> thread as well.



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