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From "Steve Loughran (JIRA)" <j...@apache.org>
Subject [jira] Commented: (MAPREDUCE-1100) User's task-logs filling up local disks on the TaskTrackers
Date Thu, 01 Apr 2010 14:18:27 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-1100?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12852395#action_12852395
] 

Steve Loughran commented on MAPREDUCE-1100:
-------------------------------------------

OK, so what do you want here? I could +1 MAPREDUCE-1057 and if hudson is happy, push out to
0.21/0.22 branches. MAPREDUCE-1100  would be the patch that goes into trunk.

The other fix would be documentation. I've added something on logging to [http://wiki.apache.org/hadoop/DiskSetup]
but it could be improved. More subtly, any production cluster that doesn't have a limit on
log size is doomed. Some preflight checks could note this and perhaps warn.

> User's task-logs filling up local disks on the TaskTrackers
> -----------------------------------------------------------
>
>                 Key: MAPREDUCE-1100
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1100
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: tasktracker
>    Affects Versions: 0.21.0
>            Reporter: Vinod K V
>            Assignee: Vinod K V
>         Attachments: MAPREDUCE-1100-20091102.txt, MAPREDUCE-1100-20091106.txt, MAPREDUCE-1100-20091216.2.txt,
patch-1100-fix-ydist.2.txt
>
>
> Some user's jobs are filling up TT disks by outrageous logging. mapreduce.task.userlog.limit.kb
is not enabled on the cluster. Disks are getting filled up before task-log cleanup via mapred.task.userlog.retain.hours
can kick in.

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