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https://issues.apache.org/jira/browse/MAPREDUCE-1100?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12853237#action_12853237
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Vinod K V commented on MAPREDUCE-1100:
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Looks like the task-logs truncation functionality through "tail -c" is broken
since 0.19 itself when jvm-reuse feature went in via HADOOP-249.
I see this issue as the final way of truncating user logs because of the
limitations we have with "tail -c". So instead of fixing "tail -c", I propose
we throw it away as part of this issue itself in favour of the truncation code
being put in here, thoughts?
> 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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