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https://issues.apache.org/jira/browse/MAPREDUCE-2452?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13035132#comment-13035132
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Owen O'Malley commented on MAPREDUCE-2452:
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Devaraj,
Can you please have the Thread catch IOExceptions and log them. Throwable
should be caught, logged, and call System.exit.
I think you need to retry if the offer returns false rather than just
dropping the cancel request.
> Delegation token cancellation shouldn't hold global JobTracker lock
> -------------------------------------------------------------------
>
> Key: MAPREDUCE-2452
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-2452
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: jobtracker
> Reporter: Devaraj Das
> Assignee: Devaraj Das
> Fix For: 0.23.0
>
> Attachments: cancel-delegation-token-fix.patch
>
>
> Currently, when the JobTracker cancels a job's delegation token (at the end
> of the job), it holds the global lock. This is not desired.
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