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From "Alejandro Abdelnur (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-3837) Hadoop 22 Job tracker is not able to recover job in case of crash and after that no user can submit job.
Date Fri, 02 Mar 2012 21:17:58 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-3837?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13221271#comment-13221271

Alejandro Abdelnur commented on MAPREDUCE-3837:

I've tested the last patch and works as expected. I'd agree with Mayank that this approach
(rerun the full job) seems much less risky than the previous approach (rerun from where it
was left).  Thus I'm good with the patch as it is much better than what currently is in. 

Arun, would you reconsider based on the explanation of what Mayank's patch does?

> Hadoop 22 Job tracker is not able to recover job in case of crash and after that no user
can submit job.
> --------------------------------------------------------------------------------------------------------
>                 Key: MAPREDUCE-3837
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-3837
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>    Affects Versions: 0.22.0
>            Reporter: Mayank Bansal
>            Assignee: Mayank Bansal
>             Fix For: 0.24.0, 0.22.1, 0.23.2
>         Attachments: PATCH-HADOOP-1-MAPREDUCE-3837-1.patch, PATCH-HADOOP-1-MAPREDUCE-3837.patch,
> If job tracker is crashed while running , and there were some jobs are running , so if
job tracker's property mapreduce.jobtracker.restart.recover is true then it should recover
the job.
> However the current behavior is as follows
> jobtracker try to restore the jobs but it can not . And after that jobtracker closes
its handle to hdfs and nobody else can submit job. 
> Thanks,
> Mayank

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