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From "Runping Qi (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-3236) Reduce task failed at shuffling time, throwing null pointer exception
Date Fri, 11 Apr 2008 13:52:06 GMT
Reduce task failed at shuffling time, throwing null pointer exception
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                 Key: HADOOP-3236
                 URL: https://issues.apache.org/jira/browse/HADOOP-3236
             Project: Hadoop Core
          Issue Type: Bug
          Components: mapred
            Reporter: Runping Qi




This happened for 0.17.0 branch.

Here is the stack trace:

2008-04-11 13:45:54,171 ERROR org.apache.hadoop.mapred.ReduceTask: Map output copy failure:
java.lang.NullPointerException
	at org.apache.hadoop.fs.InMemoryFileSystem$RawInMemoryFileSystem.getFileStatus(InMemoryFileSystem.java:302)
	at org.apache.hadoop.fs.FilterFileSystem.getFileStatus(FilterFileSystem.java:242)
	at org.apache.hadoop.mapred.ReduceTask$ReduceCopier$MapOutputCopier.copyOutput(ReduceTask.java:853)
	at org.apache.hadoop.mapred.ReduceTask$ReduceCopier$MapOutputCopier.run(ReduceTask.java:777)


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