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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-3005) MR app hangs because of a NPE in ResourceManager
Date Wed, 14 Sep 2011 21:46:08 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-3005?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13104913#comment-13104913
] 

Hadoop QA commented on MAPREDUCE-3005:
--------------------------------------

+1 overall.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12494527/MAPREDUCE-3005.patch
  against trunk revision .

    +1 @author.  The patch does not contain any @author tags.

    +1 tests included.  The patch appears to include 3 new or modified tests.

    +1 javadoc.  The javadoc tool did not generate any warning messages.

    +1 javac.  The applied patch does not increase the total number of javac compiler warnings.

    +1 findbugs.  The patch does not introduce any new Findbugs (version 1.3.9) warnings.

    +1 release audit.  The applied patch does not increase the total number of release audit
warnings.

    +1 core tests.  The patch passed unit tests in .

    +1 contrib tests.  The patch passed contrib unit tests.

Test results: https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/740//testReport/
Console output: https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/740//console

This message is automatically generated.

> MR app hangs because of a NPE in ResourceManager
> ------------------------------------------------
>
>                 Key: MAPREDUCE-3005
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-3005
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: mrv2
>    Affects Versions: 0.23.0
>            Reporter: Vinod Kumar Vavilapalli
>            Assignee: Arun C Murthy
>             Fix For: 0.23.0
>
>         Attachments: MAPREDUCE-3005-20110914.txt, MAPREDUCE-3005.patch, MAPREDUCE-3005.patch
>
>
> The app hangs and it turns out to be a NPE in ResourceManager. This happened two of five
times on [~karams]'s sort runs on a big cluster.
> {code}
> 2011-09-12 15:02:33,715 ERROR org.apache.hadoop.yarn.server.resourcemanager.ResourceManager:
Error in handling event type NODE_UPDATE to the scheduler
> java.lang.NullPointerException
>         at org.apache.hadoop.yarn.server.resourcemanager.scheduler.AppSchedulingInfo.allocateNodeLocal(AppSchedulingInfo.java:244)
>         at org.apache.hadoop.yarn.server.resourcemanager.scheduler.AppSchedulingInfo.allocate(AppSchedulingInfo.java:206)
>         at org.apache.hadoop.yarn.server.resourcemanager.scheduler.SchedulerApp.allocate(SchedulerApp.java:230)
>         at org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.LeafQueue.assignContainer(LeafQueue.java:1120)
>         at org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.LeafQueue.assignNodeLocalContainers(LeafQueue.java:961)
>         at org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.LeafQueue.assignContainersOnNode(LeafQueue.java:933)
>         at org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.LeafQueue.assignContainers(LeafQueue.java:725)
>         at org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.ParentQueue.assignContainersToChildQueues(ParentQueue.java:577)
>         at org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.ParentQueue.assignContainers(ParentQueue.java:509)
>         at org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.CapacityScheduler.nodeUpdate(CapacityScheduler.java:579)
>         at org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.CapacityScheduler.handle(CapacityScheduler.java:620)
>         at org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.CapacityScheduler.handle(CapacityScheduler.java:75)
>         at org.apache.hadoop.yarn.server.resourcemanager.ResourceManager$SchedulerEventDispatcher$EventProcessor.run(ResourceManager.java:266)
>         at java.lang.Thread.run(Thread.java:619)
> {code}

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