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https://issues.apache.org/jira/browse/HADOOP-2051?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12534960
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Doug Cutting commented on HADOOP-2051:
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> FindBugs is complaining that I'm catching Exception, which is precisely the
> point of this jira.
Maybe you should catch Throwable instead?
> JobTracker's TaskCommitQueue is vulnerable to non-IOExceptions
> --------------------------------------------------------------
>
> Key: HADOOP-2051
> URL: https://issues.apache.org/jira/browse/HADOOP-2051
> Project: Hadoop
> Issue Type: Bug
> Components: mapred
> Affects Versions: 0.15.0
> Reporter: Arun C Murthy
> Assignee: Arun C Murthy
> Priority: Blocker
> Fix For: 0.15.0
>
> Attachments: HADOOP-2051_1_20071013.patch
>
>
> The {{JobTracker#TaskCommitQueue#run}} method only handles {{IOException}}s.
> Christian Kunz ran into a scenario where a job was stuck with all tasks in
> {{COMMIT_PENDING}} state and the stack traces showed that the "Task Commit
> Thread" wasn't even around.
> The work-around is to model {{TaskCommitQueue#run}} along the lines of other
> long-running threads in the {{JobTracer}} ({{ExpireLaunchingTasks}},
> {{ExpireTrackers}} etc.) to catch, log and ignore any {{Exception}} in a loop.
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