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From "Pete Wyckoff (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-2837) JobTracker got stuck
Date Tue, 18 Mar 2008 01:38:24 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-2837?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12579701#action_12579701
] 

Pete Wyckoff commented on HADOOP-2837:
--------------------------------------

Amar,

What version of Hadoop are you hitting this issue on. We're seeing it pretty frequently on
our 15.3 cluster.  I don't see any patch or JIRA pointing to a patch, so I assume this hasn't
been fixed even in 0.16.1. Just wondering if reproducible in 16.

thanks, pete


> JobTracker got stuck 
> ---------------------
>
>                 Key: HADOOP-2837
>                 URL: https://issues.apache.org/jira/browse/HADOOP-2837
>             Project: Hadoop Core
>          Issue Type: Bug
>    Affects Versions: 0.15.3
>            Reporter: Runping Qi
>
> When a job tracker ran a job with a lot of map tasks,
> the commit thread complained out of memory:
> 2008-02-14 02:52:13,809 ERROR org.apache.hadoop.mapred.JobTracker: Task Commit Thread
got an exception: java.lang.OutOfMemoryError: Java heap space
> 2008-02-14 02:53:18,543 ERROR org.apache.hadoop.mapred.JobTracker: Task Commit Thread
got an exception: java.lang.OutOfMemoryError: Java heap space
> 2008-02-14 02:53:26,965 ERROR org.apache.hadoop.mapred.JobTracker: Task Commit Thread
got an exception: java.lang.OutOfMemoryError: Java heap space
> 2008-02-14 02:54:27,009 ERROR org.apache.hadoop.mapred.JobTracker: Task Commit Thread
got an exception: java.lang.OutOfMemoryError: Java heap space
> then later, the job tracker stopped making any progress, and stopped responding web GUI.

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