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https://issues.apache.org/jira/browse/MAPREDUCE-2289?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ahmed Radwan updated MAPREDUCE-2289:
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Status: Patch Available (was: Open)
> Permissions race can make getStagingDir fail on local filesystem
> ----------------------------------------------------------------
>
> Key: MAPREDUCE-2289
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-2289
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: job submission
> Affects Versions: 0.22.0
> Reporter: Todd Lipcon
> Assignee: Todd Lipcon
> Fix For: 0.22.1
>
> Attachments: MAPREDUCE-2289_branch-1.0.patch,
> MAPREDUCE-2289_trunk.patch, mapreduce-2289.txt
>
>
> I've observed the following race condition in TestFairSchedulerSystem which
> uses a MiniMRCluster on top of RawLocalFileSystem:
> - two threads call getStagingDir at the same time
> - Thread A checks fs.exists(stagingArea) and sees false
> -- Calls mkdirs(stagingArea, JOB_DIR_PERMISSIONS)
> --- mkdirs calls the Java mkdir API which makes the file with umask-based
> permissions
> - Thread B runs, checks fs.exists(stagingArea) and sees true
> -- checks permissions, sees the default permissions, and throws IOE
> - Thread A resumes and sets correct permissions
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