[jira] Commented: (MAPREDUCE-927) Cleanup of task-logs should happen in TaskTracker instead of the Child

["Vinod K V (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/MAPREDUCE-927?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12765002#action_12765002 ] 

Vinod K V commented on MAPREDUCE-927:
-------------------------------------

There are deeper problems:
 - it doesn't guarantee the cleanup to be finished within the time specified by mapred.task.userlog.retain.hours.
 - Undefined behavior when multiple tasks perform the cleanup simultaneously on a single node

> Cleanup of task-logs should happen in TaskTracker instead of the Child
> ----------------------------------------------------------------------
>
>                 Key: MAPREDUCE-927
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-927
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: tasktracker
>            Reporter: Vinod K V
>
> Task logs' cleanup is being done in Child now. This is undesirable atleast for two reasons: 1) failures while cleaning up will affect the user's tasks, and 2) the task's wall time will get affected due to operations that TT actually should own.

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