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From "Vinod Kumar Vavilapalli (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (MAPREDUCE-2708) [MR-279] Design and implement MR Application Master recovery
Date Fri, 21 Oct 2011 16:04:32 GMT

     [ https://issues.apache.org/jira/browse/MAPREDUCE-2708?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Vinod Kumar Vavilapalli updated MAPREDUCE-2708:

    Attachment: MAPREDUCE-2708-20111021.txt

*sigh* Downside of the great velocity for 0.23. The patch needed a *lot* of effort to upmerge
again. I did it anyways, given you are finding it hard to get some time. Fixed a couple of
trivial bugs along.

Sharad, I can take it from here - testing on cluster etc before commit.

The patch looks good overall. +1. We just need to replace the Application_AttemptID_Env with
ContainerId_Env to be consistent with AMContainer, but I'd like to do that separately. Don't
want this patch to go stale again given my experience with the update.

Oh and you sir! You write extremely beautiful tests. Elated, thanks!
> [MR-279] Design and implement MR Application Master recovery
> ------------------------------------------------------------
>                 Key: MAPREDUCE-2708
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-2708
>             Project: Hadoop Map/Reduce
>          Issue Type: Sub-task
>          Components: applicationmaster, mrv2
>    Affects Versions: 0.23.0
>            Reporter: Sharad Agarwal
>            Assignee: Sharad Agarwal
>            Priority: Blocker
>             Fix For: 0.23.0
>         Attachments: MAPREDUCE-2708-20111021.txt, mr2708_v1.patch, mr2708_v2.patch
> Design recovery of MR AM from crashes/node failures. The running job should recover from
the state it left off.

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