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https://issues.apache.org/jira/browse/HADOOP-2837?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12579062#action_12579062
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Ashish Thusoo commented on HADOOP-2837:
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Hi..
We are hitting the same issue. It has happened two times in two days for us.
> 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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