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https://issues.apache.org/jira/browse/YARN-112?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13614755#comment-13614755
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omkar vinit joshi commented on YARN-112:
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Vinod's suggestion looks good to me and it will in fact simplify FSDownload
logic. Adding unique number generator (AtomicLong) to LocalResourcesTrackerImpl
so that random (in our case now unique) number generation will be centralized
for public, private as well as application cache files.
> Race in localization can cause containers to fail
> -------------------------------------------------
>
> Key: YARN-112
> URL: https://issues.apache.org/jira/browse/YARN-112
> Project: Hadoop YARN
> Issue Type: Bug
> Components: nodemanager
> Affects Versions: 0.23.3
> Reporter: Jason Lowe
> Assignee: omkar vinit joshi
> Attachments: yarn-112-20130325.1.patch, yarn-112-20130325.patch,
> yarn-112.20131503.patch
>
>
> On one of our 0.23 clusters, I saw a case of two containers, corresponding to
> two map tasks of a MR job, that were launched almost simultaneously on the
> same node. It appears they both tried to localize job.jar and job.xml at the
> same time. One of the containers failed when it couldn't rename the
> temporary job.jar directory to its final name because the target directory
> wasn't empty. Shortly afterwards the second container failed because job.xml
> could not be found, presumably because the first container removed it when it
> cleaned up.
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