[HADOOP-12213] Interrupted exception can occur when Client#stop is called

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 2.3.0
• Fix Version/s: 2.8.0, 2.7.2, 3.0.0-alpha1
• Labels: newbie
• Target Version/s: 2.7.2
• Hadoop Flags: Reviewed
• Assignee: Kuhu Shukla
• Reporter: Oleg Zhurakousky
• Created: 20/Apr/14 20:26
• Updated: 06/Jan/17 07:40
• Resolved: 03/Sep/15 14:42

Description

Its more of a nuisance then a bug, but nevertheless

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)
. . .

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.