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https://issues.apache.org/jira/browse/MAPREDUCE-4071?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13673022#comment-13673022
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nemon lou commented on MAPREDUCE-4071:
--------------------------------------
When split metadata size exceeds 10000000,MRAppMaster will throw an IOException
during start and the NPE shows up.
Bhallamudi,are you still working on this?
> NPE while executing MRAppMaster shutdown hook
> ---------------------------------------------
>
> Key: MAPREDUCE-4071
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-4071
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: mr-am, mrv2
> Affects Versions: 0.23.3, 2.0.0-alpha, trunk
> Reporter: Bhallamudi Venkata Siva Kamesh
> Attachments: MAPREDUCE-4071-1.patch, MAPREDUCE-4071-2.patch,
> MAPREDUCE-4071-2.patch, MAPREDUCE-4071.patch
>
>
> While running the shutdown hook of MRAppMaster, hit NPE
> {noformat}
> Exception in thread "Thread-1" java.lang.NullPointerException
> at
> org.apache.hadoop.mapreduce.v2.app.MRAppMaster$ContainerAllocatorRouter.setSignalled(MRAppMaster.java:668)
> at
> org.apache.hadoop.mapreduce.v2.app.MRAppMaster$MRAppMasterShutdownHook.run(MRAppMaster.java:1004)
> {noformat}
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