You are viewing a plain text version of this content. The canonical link for it is here.
Posted to mapreduce-issues@hadoop.apache.org by "Matt Foley (JIRA)" <ji...@apache.org> on 2013/05/06 06:08:15 UTC
[jira] [Commented] (MAPREDUCE-2289) Permissions race can make
getStagingDir fail on local filesystem
[ https://issues.apache.org/jira/browse/MAPREDUCE-2289?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13649513#comment-13649513 ]
Matt Foley commented on MAPREDUCE-2289:
---------------------------------------
added 1.2.0 to fixVersion, per CHANGES.txt and svn logs.
> 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: Ahmed Radwan
> Fix For: 0.23.3, 2.0.2-alpha
>
> 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
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira