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https://issues.apache.org/jira/browse/HADOOP-2837?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Koji Noguchi updated HADOOP-2837:
---------------------------------

          Description: 
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.


  was:

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.


    Affects Version/s: 0.15.3

Asked Runping.  The user was using 0.15.3.
So, HADOOP-2119(commited in 0.17) is not the cause.


> 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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