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https://issues.apache.org/jira/browse/MAPREDUCE-3837?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13228016#comment-13228016
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Arun C Murthy commented on MAPREDUCE-3837:
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Apologies for the late response, I missed this.

Thanks for the clarification Mayank, Tucu & Konst. I agree it's much more 
palatable without all the complexities of trying to recover jobs from 
point-of-crash.

Couple of questions:
a) How does it work in a secure setting?
b) We should at least add some docs on this feature.

Makes sense?
                
> 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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