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Date: Mon, 21 Dec 2009 08:14:18 +0000 (UTC)
From: "Hemanth Yamijala (JIRA)" <jira@apache.org>
To: mapreduce-issues@hadoop.apache.org
Subject: [jira] Updated: (MAPREDUCE-896) Users can set non-writable
 permissions on temporary files for TT and can abuse disk usage.
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     [ https://issues.apache.org/jira/browse/MAPREDUCE-896?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Hemanth Yamijala updated MAPREDUCE-896:
---------------------------------------

    Status: Open  (was: Patch Available)

Canceling patch to take care of test failures.

> Users can set non-writable permissions on temporary files for TT and can abuse disk usage.
> ------------------------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-896
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-896
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: tasktracker
>    Affects Versions: 0.21.0
>            Reporter: Vinod K V
>            Assignee: Ravi Gummadi
>             Fix For: 0.21.0
>
>         Attachments: MR-896.patch, MR-896.v1.patch, MR-896.v2.patch, MR-896.v3.patch, MR-896.v4.patch, y896.v1.patch, y896.v2.1.fix.patch, y896.v2.1.fix.v1.patch, y896.v2.1.fix.v2.patch, y896.v2.1.patch, y896.v2.patch
>
>
> As of now, irrespective of the TaskController in use, TT itself does a full delete on local files created by itself or job tasks. This step, depending upon TT's umask and the permissions set by files by the user, for e.g in job-work/task-work or child.tmp directories, may or may not go through successful completion fully. Thus is left an opportunity for abusing disk space usage either accidentally or intentionally by TT/users.

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