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From "Vinod Kumar Vavilapalli (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-2708) [MR-279] Design and implement MR Application Master recovery
Date Mon, 24 Oct 2011 06:44:32 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-2708?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13133856#comment-13133856
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Vinod Kumar Vavilapalli commented on MAPREDUCE-2708:
----------------------------------------------------

I already tried with 0.23 a couple of times now. The exception trace changed a bit, but the
outcome is the same. Digging my way through DFS.

bq. btw Vinod, with recovery module unable to parse the history file (due to hdfs bug), it
should fall back to restarting the job. just curious, did you notice that? 
Yes, that code path is working. With the above errors, I am not able to see recovery in action,
restart is working good now.
                
> [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-2708-20111021.1.txt, MAPREDUCE-2708-20111021.txt, MAPREDUCE-2708-20111022.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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