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From "Hemanth Yamijala (JIRA)" <j...@apache.org>
Subject [jira] Updated: (MAPREDUCE-896) Users can set non-writable permissions on temporary files for TT and can abuse disk usage.
Date Sat, 26 Dec 2009 14:32:31 GMT

     [ https://issues.apache.org/jira/browse/MAPREDUCE-896?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

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

    Attachment: MR-896.v8.patch

I reviewed the latest patch from Ravi and am fine with the changes except that there was no
need for the accessors for cleanup queue in tasktracker to be public. The new patch makes
them package private. I ran tests locally and they passed. So, trying hudson.

> 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, MR-896.v5.patch, MR-896.v6.patch, MR-896.v7.patch, MR-896.v8.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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