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From "Devaraj K (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-4261) MRAppMaster throws NPE while stopping RMContainerAllocator service
Date Thu, 17 May 2012 04:45:03 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-4261?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13277556#comment-13277556
] 

Devaraj K commented on MAPREDUCE-4261:
--------------------------------------

Hi Kamesh, I think both issues are different. MAPREDUCE-4071 refering to the case where containerAllocator(RMCommunicator
instance) is null and trying to invoke setSignalled() method on it.

This issue occurred while stopping the RMContainerAllocator service. I feel it is better to
handle this separately.
                
> MRAppMaster throws NPE while stopping RMContainerAllocator service
> ------------------------------------------------------------------
>
>                 Key: MAPREDUCE-4261
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4261
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: mr-am
>    Affects Versions: 2.0.0, 3.0.0
>            Reporter: Devaraj K
>            Assignee: Devaraj K
>
> {code:xml}
> 2012-05-16 18:55:54,222 INFO [Thread-1] org.apache.hadoop.yarn.service.CompositeService:
Error stopping org.apache.hadoop.mapreduce.v2.app.MRAppMaster$ContainerLauncherRouter
> java.lang.NullPointerException
> 	at org.apache.hadoop.mapreduce.v2.app.MRAppMaster$ContainerLauncherRouter.stop(MRAppMaster.java:716)
> 	at org.apache.hadoop.yarn.service.CompositeService.stop(CompositeService.java:99)
> 	at org.apache.hadoop.yarn.service.CompositeService.stop(CompositeService.java:89)
> 	at org.apache.hadoop.mapreduce.v2.app.MRAppMaster$MRAppMasterShutdownHook.run(MRAppMaster.java:1036)
> 	at org.apache.hadoop.util.ShutdownHookManager$1.run(ShutdownHookManager.java:54)
> 2012-05-16 18:55:54,222 INFO [Thread-1] org.apache.hadoop.yarn.service.CompositeService:
Error stopping org.apache.hadoop.mapreduce.v2.app.MRAppMaster$ContainerAllocatorRouter
> java.lang.NullPointerException
> 	at org.apache.hadoop.mapreduce.v2.app.rm.RMContainerAllocator.getStat(RMContainerAllocator.java:521)
> 	at org.apache.hadoop.mapreduce.v2.app.rm.RMContainerAllocator.stop(RMContainerAllocator.java:227)
> 	at org.apache.hadoop.mapreduce.v2.app.MRAppMaster$ContainerAllocatorRouter.stop(MRAppMaster.java:668)
> 	at org.apache.hadoop.yarn.service.CompositeService.stop(CompositeService.java:99)
> 	at org.apache.hadoop.yarn.service.CompositeService.stop(CompositeService.java:89)
> 	at org.apache.hadoop.mapreduce.v2.app.MRAppMaster$MRAppMasterShutdownHook.run(MRAppMaster.java:1036)
> 	at org.apache.hadoop.util.ShutdownHookManager$1.run(ShutdownHookManager.java:54)
> {code}

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