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https://issues.apache.org/jira/browse/MAPREDUCE-5332?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13764781#comment-13764781
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Jason Lowe commented on MAPREDUCE-5332:
---------------------------------------
The test failures are unrelated. TestUberAM still hasn't been fixed, see
MAPREDUCE-5481. I can reproduce the TestMRJobClient failure on trunk, filed
MAPREDUCE-5503.
> Support token-preserving restart of history server
> --------------------------------------------------
>
> Key: MAPREDUCE-5332
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-5332
> Project: Hadoop Map/Reduce
> Issue Type: New Feature
> Components: jobhistoryserver
> Reporter: Jason Lowe
> Assignee: Jason Lowe
> Attachments: MAPREDUCE-5332-2.patch, MAPREDUCE-5332-3.patch,
> MAPREDUCE-5332-4.patch, MAPREDUCE-5332.patch
>
>
> To better support rolling upgrades through a cluster, the history server
> needs the ability to restart without losing track of delegation tokens.
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