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Date: Tue, 28 Nov 2006 09:17:26 -0800 (PST)
From: "Arun C Murthy (JIRA)" <jira@apache.org>
To: hadoop-dev@lucene.apache.org
Subject: [jira] Updated: (HADOOP-639) task cleanup messages can get lost,
 causing task trackers to keep tasks forever
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     [ http://issues.apache.org/jira/browse/HADOOP-639?page=all ]

Arun C Murthy updated HADOOP-639:
---------------------------------

    Attachment: HADOOP-639_1.patch

Ok, here is an initial patch for review; I'll test this on a bigger cluster once HADOOP-753 / HADOOP-754 are resolved... meanwhile I'd appreciate feedback on this one...

> 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
>
>
> 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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