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https://issues.apache.org/jira/browse/MAPREDUCE-1430?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12806477#action_12806477
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Boris Shkolnik commented on MAPREDUCE-1430:
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We may need to add an expiration date to the o.a.h.security.Token class
Created HADOOP-6523 for this.

> JobTracker should be able to renew delegation tokens for the jobs
> -----------------------------------------------------------------
>
>                 Key: MAPREDUCE-1430
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1430
>             Project: Hadoop Map/Reduce
>          Issue Type: New Feature
>          Components: jobtracker
>    Affects Versions: 0.22.0
>            Reporter: Devaraj Das
>            Assignee: Boris Shkolnik
>             Fix For: 0.22.0
>
>
> JobTracker should automatically renew delegation tokens for the jobs it is 
> currently running.

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