NPE in SocketChannelOutputStream during large sort benchmark
------------------------------------------------------------
Key: HADOOP-974
URL: https://issues.apache.org/jira/browse/HADOOP-974
Project: Hadoop
Issue Type: Bug
Components: mapred
Affects Versions: 0.11.0
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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