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https://issues.apache.org/jira/browse/HADOOP-5184?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12671227#action_12671227
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Owen O'Malley commented on HADOOP-5184:
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Did you get a heap dump? If it happens again, see if you can get one. Of course
when heap runs out, it isn't necessarily related to the task that asked for the
straw that broke the camel's back.
> OOM in the TaskTracker while serving map outputs
> ------------------------------------------------
>
> Key: HADOOP-5184
> URL: https://issues.apache.org/jira/browse/HADOOP-5184
> Project: Hadoop Core
> Issue Type: Bug
> Components: mapred
> Reporter: Devaraj Das
>
> Saw this exception in the TT logs:
> 2009-02-06 06:18:08,553 ERROR org.mortbay.log: EXCEPTION
> java.lang.OutOfMemoryError: GC overhead limit exceeded
> 2009-02-06 06:18:11,247 ERROR org.mortbay.log: Error for /mapOutput
> java.lang.OutOfMemoryError: GC overhead limit exceeded
> 2009-02-06 06:18:11,247 ERROR org.mortbay.log: Error for /mapOutput
> java.lang.OutOfMemoryError: Java heap space
> at java.nio.HeapByteBuffer.<init>(HeapByteBuffer.java:39)
> at java.nio.ByteBuffer.allocate(ByteBuffer.java:312)
> at
> org.mortbay.io.nio.IndirectNIOBuffer.<init>(IndirectNIOBuffer.java:28)
> at
> org.mortbay.jetty.nio.AbstractNIOConnector.newBuffer(AbstractNIOConnector.java:71)
> at
> org.mortbay.jetty.AbstractBuffers.getBuffer(AbstractBuffers.java:131)
> at org.mortbay.jetty.HttpGenerator.addContent(HttpGenerator.java:145)
> at
> org.mortbay.jetty.AbstractGenerator$Output.write(AbstractGenerator.java:642)
> at
> org.mortbay.jetty.AbstractGenerator$Output.write(AbstractGenerator.java:577)
> at
> org.apache.hadoop.mapred.TaskTracker$MapOutputServlet.doGet(TaskTracker.java:2879)
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