[ 
https://issues.apache.org/jira/browse/YARN-2594?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Wangda Tan updated YARN-2594:
-----------------------------
    Attachment: YARN-2594.patch

Attached a fix, doesn't include a test because I found it will be hard to add 
such tests.
This probably the simplest fix, just remove the read lock when getting 
currentAppAttempt in RMApp.

Dead lock is:
1) SchedulerApplicationAttempt (lock *SchedulerApplicationAttempt*) 
containerComplete -> RMContainerImpl -> updateAttemptMetrics (lock *RMApp*)

2) RPC:getApplicationReport -> RMAppImpl(lock *RMApp*) ->  ... -> 
SchedulerApplicationAttempt.getResourceUsageReport (lock 
*SchedulerApplicationAttempt*)

Remove any of the four locks will resolve the problem, the fix removes 
"updateAttemptMetrics (lock *RMApp*)".

Please kindly review.


> ResourceManger sometimes become un-responsive
> ---------------------------------------------
>
>                 Key: YARN-2594
>                 URL: https://issues.apache.org/jira/browse/YARN-2594
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: resourcemanager
>    Affects Versions: 2.6.0
>            Reporter: Karam Singh
>            Assignee: Wangda Tan
>            Priority: Blocker
>         Attachments: YARN-2594.patch
>
>
> ResoruceManager sometimes become un-responsive:
> There was in exception in ResourceManager log and contains only  following 
> type of messages:
> {code}
> 2014-09-19 19:13:45,241 INFO  event.AsyncDispatcher 
> (AsyncDispatcher.java:handle(232)) - Size of event-queue is 53000
> 2014-09-19 19:30:26,312 INFO  event.AsyncDispatcher 
> (AsyncDispatcher.java:handle(232)) - Size of event-queue is 54000
> 2014-09-19 19:47:07,351 INFO  event.AsyncDispatcher 
> (AsyncDispatcher.java:handle(232)) - Size of event-queue is 55000
> 2014-09-19 20:03:48,460 INFO  event.AsyncDispatcher 
> (AsyncDispatcher.java:handle(232)) - Size of event-queue is 56000
> 2014-09-19 20:20:29,542 INFO  event.AsyncDispatcher 
> (AsyncDispatcher.java:handle(232)) - Size of event-queue is 57000
> 2014-09-19 20:37:10,635 INFO  event.AsyncDispatcher 
> (AsyncDispatcher.java:handle(232)) - Size of event-queue is 58000
> 2014-09-19 20:53:51,722 INFO  event.AsyncDispatcher 
> (AsyncDispatcher.java:handle(232)) - Size of event-queue is 59000
> {code}



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