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Date: Thu, 9 Jan 2014 23:51:50 +0000 (UTC)
From: "Karthik Kambatla (JIRA)" <jira@apache.org>
To: mapreduce-issues@hadoop.apache.org
Message-ID: <JIRA.12681128.1385413613402.72739.1389311510809@arcas>
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Subject: [jira] [Commented] (MAPREDUCE-5652) ShuffleHandler should handle NM
 restarts
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    [ https://issues.apache.org/jira/browse/MAPREDUCE-5652?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13867302#comment-13867302 ] 

Karthik Kambatla commented on MAPREDUCE-5652:
---------------------------------------------

Thanks for the update, [~jlowe]. Glad to know this is being handled as part of YARN-1336. Looks like it is better to just wait for YARN-1336 to be done, and address any remaining items here. Please feel free to take this over too. 

Curious - is there a branch for the YARN-1336 changes I can take an early peek at? 

> 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: Karthik Kambatla
>              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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