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https://issues.apache.org/jira/browse/MAPREDUCE-16?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Harsh J resolved MAPREDUCE-16.
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Resolution: Not A Problem
This has gone stale, and has not been reported again recently. Was probably
fixed at some point.
We also do not use that particular FS anymore.
> Reduce task failed at shuffling time, throwing null pointer exception
> ---------------------------------------------------------------------
>
> Key: MAPREDUCE-16
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-16
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> 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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