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From "Harsh J (Resolved) (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (MAPREDUCE-10) NPE in SocketChannelOutputStream during large sort benchmark
Date Sat, 31 Dec 2011 08:50:30 GMT

     [ https://issues.apache.org/jira/browse/MAPREDUCE-10?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Harsh J resolved MAPREDUCE-10.
------------------------------

    Resolution: Not A Problem

This has gone stale, and has not been reported again recently. Was probably fixed at some
point.
                
> NPE in SocketChannelOutputStream during large sort benchmark
> ------------------------------------------------------------
>
>                 Key: MAPREDUCE-10
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-10
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>            Reporter: Nigel Daley
>
> Running sort benchmark, I saw this NPE trace in the JobTracker log
> ...
> 2007-02-04 02:07:23,753 INFO org.apache.hadoop.mapred.JobInProgress: Already complete
TIP tip_0002_m_032689 has completed task task_0002_m_032689_2
> 2007-02-04 02:07:23,753 INFO org.apache.hadoop.mapred.TaskInProgress: Task 'task_0002_m_032689_2'
has completed.
> 2007-02-04 02:07:24,566 WARN org.apache.hadoop.ipc.Server: handler output errorjava.io.IOException:
Connection reset by peer
>         at sun.nio.ch.FileDispatcher.write0(Native Method)
>         at sun.nio.ch.SocketDispatcher.write(SocketDispatcher.java:29)
>         at sun.nio.ch.IOUtil.writeFromNativeBuffer(IOUtil.java:104)
>         at sun.nio.ch.IOUtil.write(IOUtil.java:75)
>         at sun.nio.ch.SocketChannelImpl.write(SocketChannelImpl.java:302)
>         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$Handler.run(Server.java:556)
> 2007-02-04 02:07:24,569 WARN org.apache.hadoop.ipc.Server: handler output error
> java.lang.NullPointerException
>         at org.apache.hadoop.ipc.SocketChannelOutputStream.flushBuffer(SocketChannelOutputStream.java:108)
>         at org.apache.hadoop.ipc.SocketChannelOutputStream.write(SocketChannelOutputStream.java:89)
>         at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:65)
>         at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:123)
>         at java.io.DataOutputStream.flush(DataOutputStream.java:106)
>         at org.apache.hadoop.ipc.Server$Handler.run(Server.java:556)
> 2007-02-04 02:07:32,510 INFO org.apache.hadoop.mapred.JobInProgress: Task 'task_0002_m_077715_2'
has completed tip_0002_m_077715 successfully.
> ...

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