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From "Mayank Bansal (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 Tue, 13 Mar 2012 18:36:42 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-3837?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13228571#comment-13228571
] 

Mayank Bansal commented on MAPREDUCE-3837:
------------------------------------------

Thanks Arun for your reply.

a) It reads the user id from the job token stored into the system directory and submits the
job as that user, so the actual job runs as that user.
b) Yeah you are right, I will add the documentation and append it to the patch.

Thanks,
Mayank
                
> 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-3837-2.patch,
PATCH-HADOOP-1-MAPREDUCE-3837.patch, PATCH-MAPREDUCE-3837.patch, PATCH-TRUNK-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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