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From "Devaraj K (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-1980) Possible NPE in KillAMPreemptionPolicy related to ProportionalCapacityPreemptionPolicy
Date Tue, 29 Apr 2014 10:47:16 GMT

    [ https://issues.apache.org/jira/browse/YARN-1980?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13984188#comment-13984188
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Devaraj K commented on YARN-1980:
---------------------------------

Changes involve in mapreduce project, moving to mapreduce.

> Possible NPE in KillAMPreemptionPolicy related to ProportionalCapacityPreemptionPolicy
> --------------------------------------------------------------------------------------
>
>                 Key: YARN-1980
>                 URL: https://issues.apache.org/jira/browse/YARN-1980
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: resourcemanager
>    Affects Versions: 2.3.0
>            Reporter: Sunil G
>         Attachments: Yarn-1980.1.patch
>
>
> I configured KillAMPreemptionPolicy for My Application Master and tried to check preemption
of queues.
> In one scenario I have seen below NPE in my AM
> 014-04-24 15:11:08,860 ERROR [RMCommunicator Allocator] org.apache.hadoop.mapreduce.v2.app.rm.RMContainerAllocator:
ERROR IN CONTACTING RM. 
> java.lang.NullPointerException
> 	at org.apache.hadoop.mapreduce.v2.app.rm.preemption.KillAMPreemptionPolicy.preempt(KillAMPreemptionPolicy.java:57)
> 	at org.apache.hadoop.mapreduce.v2.app.rm.RMContainerAllocator.getResources(RMContainerAllocator.java:662)
> 	at org.apache.hadoop.mapreduce.v2.app.rm.RMContainerAllocator.heartbeat(RMContainerAllocator.java:246)
> 	at org.apache.hadoop.mapreduce.v2.app.rm.RMCommunicator$1.run(RMCommunicator.java:267)
> 	at java.lang.Thread.run(Thread.java:662)
> I was using 2.2.0 and merged MAPREDUCE-5189 to see how AM preemption works.



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