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Date: Thu, 4 Feb 2010 20:25:29 +0000 (UTC)
From: "Ravi Gummadi (JIRA)" <jira@apache.org>
To: mapreduce-issues@hadoop.apache.org
Subject: [jira] Commented: (MAPREDUCE-1435) symlinks in cwd of the task are
 not handled properly after MAPREDUCE-896
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    [ https://issues.apache.org/jira/browse/MAPREDUCE-1435?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12829760#action_12829760 ] 

Ravi Gummadi commented on MAPREDUCE-1435:
-----------------------------------------

TestFileArgs failed(known issue MAPREDUCE-1375) and all other unit tests passed on my local machine.

> symlinks in cwd of the task are not handled properly after MAPREDUCE-896
> ------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-1435
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1435
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: tasktracker
>    Affects Versions: 0.22.0
>            Reporter: Amareshwari Sriramadasu
>            Assignee: Ravi Gummadi
>             Fix For: 0.22.0
>
>         Attachments: 1435.patch, 1435.v1.patch, 1435.v2.patch
>
>
> With JVM reuse, TaskRunner.setupWorkDir() lists the contents of workDir and does a fs.delete on each path listed. If the listed file is a symlink to directory, it will delete the contents of those linked directories. This would delete files from distributed cache and jars directory,if mapred.create.symlink is true.
> Changing ownership/permissions of symlinks through ENABLE_TASK_FOR_CLEANUP would change ownership/permissions of underlying files.
> This is observed by Karam while running streaming jobs with DistributedCache and jvm reuse.

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