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From "Arun C Murthy (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-639) task cleanup messages can get lost, causing task trackers to keep tasks forever
Date Wed, 29 Nov 2006 19:40:23 GMT
     [ http://issues.apache.org/jira/browse/HADOOP-639?page=all ]

Arun C Murthy updated HADOOP-639:

    Attachment: HADOOP-639_2_20061130.patch

Makes sense Doug, here is the naming change to 'heartbeat'... appreciate your feedback.

Meanwhile could you please hold off committing this patch till I do some further testing on
a large cluster (am currently blocked on HADOOP-753 / HADOOP-754) ... once i get that done
i'll give a heads-up. Meanwhile I'd love to hear about any other comments/nits you have with
any part of this patch... thanks!

> 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
>             Fix For: 0.9.0
>         Attachments: HADOOP-639_1.patch, HADOOP-639_2_20061130.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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