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Date: Mon, 11 Aug 2008 21:54:46 -0700 (PDT)
From: "Owen O'Malley (JIRA)" <jira@apache.org>
To: core-dev@hadoop.apache.org
Subject: [jira] Updated: (HADOOP-3915) reducers hang, jobtracker loosing
 completely track of them.
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     [ https://issues.apache.org/jira/browse/HADOOP-3915?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Owen O'Malley updated HADOOP-3915:
----------------------------------

    Fix Version/s:     (was: 0.17.2)

Moving this from 0.17.2, since I'm trying to cut a 0.17.2 release candidate and this is not diagnosed. 

> reducers hang, jobtracker loosing completely track of them.
> -----------------------------------------------------------
>
>                 Key: HADOOP-3915
>                 URL: https://issues.apache.org/jira/browse/HADOOP-3915
>             Project: Hadoop Core
>          Issue Type: Bug
>    Affects Versions: 0.17.1
>         Environment: EC2, Debian Etch  (but not the ec2-contrib stuff)
> streaming.jar
>            Reporter: Andreas Kostyrka
>         Attachments: hadoop-hadoop-jobtracker-ec2-67-202-58-97.compute-1.amazonaws.com.log
>
>
> I just noticed the following curious situation:
> -) 18 of 22 reducers are waiting for 3 hours or so with 0.01MB/s and no progress.
> -) hadoop job -kill-task does not work on the ids shown
> -) killing all reduce work tasks (the spawned Python processes, not java TaskTracker$Child) gets completely ignored by the JobTracker, the jobtracker shows them still as running.

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