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From "Vinod K V (JIRA)" <j...@apache.org>
Subject [jira] Updated: (MAPREDUCE-1609) TaskTracker.localizeJob should not set permissions on job log directory recursively
Date Wed, 28 Apr 2010 04:30:32 GMT

     [ https://issues.apache.org/jira/browse/MAPREDUCE-1609?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Vinod K V updated MAPREDUCE-1609:

          Status: Resolved  (was: Patch Available)
    Hadoop Flags: [Reviewed]
    Release Note: Fixed TaskTracker so that it does not set permissions on job-log directory
recursively. This fix both improves the performance of job localization as well as avoids
a bug related to launching of task-cleanup attempts after TaskTracker's restart.
      Resolution: Fixed

I just committed this. Thanks Amareshwari!

> TaskTracker.localizeJob should not set permissions on job log directory recursively
> -----------------------------------------------------------------------------------
>                 Key: MAPREDUCE-1609
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1609
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: tasktracker
>    Affects Versions: 0.22.0
>            Reporter: Amareshwari Sriramadasu
>            Assignee: Amareshwari Sriramadasu
>             Fix For: 0.22.0
>         Attachments: MAPREDUCE-1609-20-1.patch, patch-1609-1.txt, patch-1609.txt
> Currently TaskTracker.localizeJob sets permissions (570 with LinuxTaskController) on
job log directory recursively. When the tracker restarts/reinits, if there are new tasks for
the job, localizeJob would find attempt log directories for the earlier tasks. If the job
has many tasks, it would spend significant time in chmod'ing.
> Also, if a cleanup attempt is launched after the restart/reinit, we would hit MAPREDUCE-1607.
> This problem is missed by the patch for MAPREDUCE-927. The above problem never existed
before MAPREDUCE:927.

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