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From "Rajesh Balamohan (JIRA)" <j...@apache.org>
Subject [jira] Commented: (MAPREDUCE-1354) Refactor JobTracker.submitJob to not lock the JobTracker during the HDFS accesses
Date Tue, 16 Feb 2010 10:35:27 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-1354?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12834149#action_12834149
] 

Rajesh Balamohan commented on MAPREDUCE-1354:
---------------------------------------------

Plz ignore the previous comment. Had a discussion with Hemanth and will try out synchronized(jobs)
on trunk.

> Refactor JobTracker.submitJob to not lock the JobTracker during the HDFS accesses
> ---------------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-1354
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1354
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: jobtracker
>            Reporter: Devaraj Das
>            Assignee: Arun C Murthy
>            Priority: Critical
>         Attachments: MAPREDUCE-1354_yhadoop20.patch, MAPREDUCE-1354_yhadoop20.patch,
MAPREDUCE-1354_yhadoop20.patch, MAPREDUCE-1354_yhadoop20.patch, MAPREDUCE-1354_yhadoop20.patch,
MAPREDUCE-1354_yhadoop20.patch
>
>
> It'd be nice to have the JobTracker object not be locked while accessing the HDFS for
reading the jobconf file and while writing the jobinfo file in the submitJob method. We should
see if we can avoid taking the lock altogether.

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