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From "Jason Lowe (JIRA)" <j...@apache.org>
Subject [jira] [Assigned] (MAPREDUCE-5652) ShuffleHandler should handle NM restarts
Date Fri, 10 Jan 2014 23:27:51 GMT

     [ https://issues.apache.org/jira/browse/MAPREDUCE-5652?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jason Lowe reassigned MAPREDUCE-5652:
-------------------------------------

    Assignee: Jason Lowe  (was: Karthik Kambatla)

There's no corresponding sub-task under YARN-1336 since these are changes specific to the
ShuffleHandler in MapReduce.  Since JIRA doesn't let us mark this as a subtask of a different
JIRA project, I think it's best to mark it as related and leave it for tracking the MapReduce-specific
changes.  Alternate suggestions for tracking the MR-specific changes related to YARN-1336?

> ShuffleHandler should handle NM restarts
> ----------------------------------------
>
>                 Key: MAPREDUCE-5652
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-5652
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>    Affects Versions: 2.2.0
>            Reporter: Karthik Kambatla
>            Assignee: Jason Lowe
>              Labels: shuffle
>
> ShuffleHandler should work across NM restarts and not require re-running map-tasks. On
NM restart, the map outputs are cleaned up requiring re-execution of map tasks and should
be avoided.



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