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https://issues.apache.org/jira/browse/HADOOP-3356?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Arun C Murthy updated HADOOP-3356:
----------------------------------
Priority: Critical (was: Major)
> SequenceFile.MergeQueue.merge inadvertently creates merge-outputs in the
> wrong FileSystem, at times in the InMemoryFileSystem
> -----------------------------------------------------------------------------------------------------------------------------
>
> Key: HADOOP-3356
> URL: https://issues.apache.org/jira/browse/HADOOP-3356
> Project: Hadoop Core
> Issue Type: Bug
> Components: io
> Affects Versions: 0.16.3
> Reporter: Arun C Murthy
> Assignee: Arun C Murthy
> Priority: Critical
> Fix For: 0.18.0
>
>
> The offending code is:
> {code:title=SequenceFile.java}
> Path outputFile = lDirAlloc.getLocalPathForWrite(
> tmpFilename.toString(),
> approxOutputSize, conf);
> LOG.debug("writing intermediate results to " + outputFile);
> Writer writer = cloneFileAttributes(
>
> fs.makeQualified(segmentsToMerge.get(0).segmentPathName),
> fs.makeQualified(outputFile),
> null);
> {code}
> *fs* is InMemoryFileSystem when ReduceTask.ReduceCopier constructs it... so
> the wrong FileSystem is used during intermediate merges.
>
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