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Posted to mapreduce-issues@hadoop.apache.org by "Arun C Murthy (Updated) (JIRA)" <ji...@apache.org> on 2011/10/04 10:14:34 UTC

[jira] [Updated] (MAPREDUCE-2702) [MR-279] OutputCommitter changes for MR Application Master recovery

     [ https://issues.apache.org/jira/browse/MAPREDUCE-2702?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Arun C Murthy updated MAPREDUCE-2702:
-------------------------------------

    Attachment: MAPREDUCE-2702.patch

Sharad, I realize you are probably busy, so I went ahead and updated the patch with my comments.

If are ok with it, I'll commit it. Thanks!
                
> [MR-279] OutputCommitter changes for MR Application Master recovery
> -------------------------------------------------------------------
>
>                 Key: MAPREDUCE-2702
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-2702
>             Project: Hadoop Map/Reduce
>          Issue Type: New Feature
>          Components: mrv2
>            Reporter: Sharad Agarwal
>            Assignee: Sharad Agarwal
>            Priority: Blocker
>         Attachments: MAPREDUCE-2702.patch, mr2702_v1.patch, mr2702_v2.patch, mr2702_v3.patch, mr2702_v4.patch
>
>
> In MR AM recovers from a crash, it only reruns the non completed tasks. The completed tasks (along with their output, if any) needs to be recovered from the previous life. This would require some changes in OutputCommitter.

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