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https://issues.apache.org/jira/browse/HADOOP-707?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12533654
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Devaraj Das commented on HADOOP-707:
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This could be related to HADOOP-2016
> Final map task gets stuck
> -------------------------
>
> Key: HADOOP-707
> URL: https://issues.apache.org/jira/browse/HADOOP-707
> Project: Hadoop
> Issue Type: Bug
> Components: mapred
> Affects Versions: 0.8.0
> Environment: using latest trunk
> Reporter: Johan Oskarsson
> Assignee: Owen O'Malley
> Priority: Critical
>
> I've seen numerous jobs lately where the final map task gets stuck, never
> finishing.
> The jobtracker doesn't reassign the task. A restart of the tasktracker solves
> the issue and the job can finish.
> In the web interface it turns up as:
> task_0028_m_000534_0 node17.herd1 RUNNING 0.00% 10-Nov-2006 12:21:12
> 10-Nov-2006 12:22:19 (1mins, 6sec)
> Task failed to report status for 604 seconds. Killing.
> Only exception I find in that tasktracker log is this (a few times):
> java.nio.channels.ClosedChannelException
> at
> sun.nio.ch.SocketChannelImpl.ensureWriteOpen(SocketChannelImpl.java:125)
> at sun.nio.ch.SocketChannelImpl.write(SocketChannelImpl.java:294)
> at
> org.apache.hadoop.ipc.SocketChannelOutputStream.flushBuffer(SocketChannelOutputStream.java:108)
> at
> org.apache.hadoop.ipc.SocketChannelOutputStream.write(SocketChannelOutputStream.java:89)
> at
> java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:65)
> at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:123)
> at java.io.DataOutputStream.flush(DataOutputStream.java:106)
> at org.apache.hadoop.ipc.Server$Handler.run(Server.java:532)
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