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https://issues.apache.org/jira/browse/HADOOP-5248?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Devaraj Das resolved HADOOP-5248.
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Resolution: Fixed
I just committed the testcase.
> Job directories could remain undeleted in some scenarios after job completes.
> -----------------------------------------------------------------------------
>
> Key: HADOOP-5248
> URL: https://issues.apache.org/jira/browse/HADOOP-5248
> Project: Hadoop Core
> Issue Type: Bug
> Components: mapred
> Reporter: Hemanth Yamijala
> Assignee: Devaraj Das
> Priority: Blocker
> Fix For: 0.20.0
>
> Attachments: 5248-testcase.patch, 5248.patch
>
>
> I observed a couple of times that when a job has completed, its job
> directories were not cleaned up. In discussion, it seems like there is a
> condition when only reduces from a job are run on a machine and no maps, the
> TT does not get a signal from the JT to delete the files and could be left
> behind. FYI, JVM reuse was enabled at the time. I can confirm that
> 'KillJobAction' was not received by the TT.
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