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From "Mahadev konar (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-639) task cleanup messages can get lost, causing task trackers to keep tasks forever
Date Wed, 06 Dec 2006 05:40:23 GMT
    [ http://issues.apache.org/jira/browse/HADOOP-639?page=comments#action_12455871 ] 
Mahadev konar commented on HADOOP-639:

sorry to have miscommunicated again! :). .. what I meant was the patch should still rely on
KILLJOBACTION but rather than cleaning up the job directory in each task cleanup we could
just have a cleanup method on running job that cleans up the tasks which the RunningJob has
and then cleans up the job directory --- (implying that the job directory cleanup code would
move from task cleanup to job cleanup).

so the code would look something like:
  for all runningJob.tasks {
 Also I have just been commenting since I took a look at the patch :). I can file different
bugs so that you do not have to incorporate these changes into your patch which would avoid
making your patch huge.

> task cleanup messages can get lost, causing task trackers to keep tasks forever
> -------------------------------------------------------------------------------
>                 Key: HADOOP-639
>                 URL: http://issues.apache.org/jira/browse/HADOOP-639
>             Project: Hadoop
>          Issue Type: Bug
>          Components: mapred
>    Affects Versions: 0.7.2
>            Reporter: Owen O'Malley
>         Assigned To: Arun C Murthy
>         Attachments: HADOOP-639_1.patch, HADOOP-639_2_20061130.patch, HADOOP-639_3_20061201.patch,
> If the pollForTaskWithClosedJob call from a job tracker to a task tracker times out when
a job completes, the tasks are never cleaned up. This can cause the mini m/r cluster to hang
on shutdown, but also is a resource leak.

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