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https://issues.apache.org/jira/browse/HADOOP-1873?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12530462
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Allen Wittenauer commented on HADOOP-1873:
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BTW, I would expect the key cache to have not just the tickets for the MR job 
but any other tickets submitted with the job.  For example, if my MR job needed 
to write to a Kerberized NFS mount, those tickets should go with the job, be 
renewed as needed, etc.

> User permissions for Map/Reduce
> -------------------------------
>
>                 Key: HADOOP-1873
>                 URL: https://issues.apache.org/jira/browse/HADOOP-1873
>             Project: Hadoop
>          Issue Type: Improvement
>            Reporter: Raghu Angadi
>            Assignee: Raghu Angadi
>
> HADOOP-1298 and HADOOP-1701 add permissions and pluggable security for DFS 
> files and DFS accesses. Same users permission should work for Map/Reduce jobs 
> as well. 
> User persmission should propegate from client to map/reduce tasks and all the 
> file operations should be subject to user permissions. This is transparent to 
> the user (i.e. no changes to user code should be required). 

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