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https://issues.apache.org/jira/browse/MAPREDUCE-913?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12786775#action_12786775
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Sreekanth Ramakrishnan commented on MAPREDUCE-913:
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Took a look at the patch, following at the comments :
* Can we check if the workDir is non-null in the run-debug script and throw an
exception if the same is null? Would prevent launch of task-controller code.
* In test case can we verify the correct number of the map slot is actually
reported back to JobTracker after the failing job completes, this would test
the actual slot management.
Wouldn't it be much better that we add a check to figure out if the taskJVM was
launched or not and then run debug script accordingly.
> TaskRunner crashes with NPE resulting in held up slots, UNINITIALIZED tasks
> and hung TaskTracker
> ------------------------------------------------------------------------------------------------
>
> Key: MAPREDUCE-913
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-913
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: tasktracker
> Affects Versions: 0.20.1
> Reporter: Vinod K V
> Priority: Blocker
> Fix For: 0.21.0
>
> Attachments: mapreduce-913-1.patch, MAPREDUCE-913-20091119.1.txt,
> MAPREDUCE-913-20091119.2.txt, MAPREDUCE-913-20091120.1.txt
>
>
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