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From "Kan Zhang (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-3578) mapred.system.dir should be accessible only to hadoop daemons
Date Mon, 27 Apr 2009 23:55:32 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-3578?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12703447#action_12703447
] 

Kan Zhang commented on HADOOP-3578:
-----------------------------------

Thanks. I had a misconception about DistributedCache.

> mapred.system.dir should be accessible only to hadoop daemons 
> --------------------------------------------------------------
>
>                 Key: HADOOP-3578
>                 URL: https://issues.apache.org/jira/browse/HADOOP-3578
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: mapred
>            Reporter: Amar Kamat
>            Assignee: Amar Kamat
>         Attachments: HADOOP-3578-v2.6.patch
>
>
> Currently the jobclient accesses the {{mapred.system.dir}} to add job details. Hence
the {{mapred.system.dir}} has the permissions of {{rwx-wx-wx}}. This could be a security loophole
where the job files might get overwritten/tampered after the job submission. 

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