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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