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https://issues.apache.org/jira/browse/YARN-1386?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13820682#comment-13820682
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Jonathan Eagles commented on YARN-1386:
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+1. Great fix, Jason.
> NodeManager mistakenly loses resources and relocalizes them
> -----------------------------------------------------------
>
> Key: YARN-1386
> URL: https://issues.apache.org/jira/browse/YARN-1386
> Project: Hadoop YARN
> Issue Type: Bug
> Components: nodemanager
> Affects Versions: 0.23.10, 2.2.0
> Reporter: Jason Lowe
> Assignee: Jason Lowe
> Priority: Critical
> Attachments: YARN-1386.patch, YARN-1386.patch
>
>
> When a local resource that should already be present is requested again, the
> nodemanager checks to see if it still present. However the method it uses to
> check for presence is via File.exists() as the user of the nodemanager
> process. If the resource was a private resource localized for another user,
> it will be localized to a location that is not accessible by the nodemanager
> user. Therefore File.exists() returns false, the nodemanager mistakenly
> believes the resource is no longer available, and it proceeds to localize it
> over and over.
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