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https://issues.apache.org/jira/browse/MAPREDUCE-1307?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12806272#action_12806272
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Vinod K V commented on MAPREDUCE-1307:
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My point is not just limited to the default value. At present, users can set
arbitrary group ownership for their files on HDFS while JT gets groups details
from the machine's own group database. And these two can differ.
In any case this groups related conflict will only arise once we start fixing
MAPREDUCE-1288 to let a group of users share Distcache files. May be I spoke
too soon.
> Introduce the concept of Job Permissions
> ----------------------------------------
>
> Key: MAPREDUCE-1307
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-1307
> Project: Hadoop Map/Reduce
> Issue Type: Sub-task
> Components: security
> Reporter: Devaraj Das
> Fix For: 0.22.0
>
> Attachments: 1307-early-1.patch
>
>
> It would be good to define the notion of job permissions analogous to file
> permissions. Then the JobTracker can restrict who can "read" (e.g. look at
> the job page) or "modify" (e.g. kill) jobs.
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