Randy Clayton created MAPREDUCE-4234:
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Summary: SortValidator.java is incompatible with multi-user or
parallel use (due to a /tmp file with static name)
Key: MAPREDUCE-4234
URL: https://issues.apache.org/jira/browse/MAPREDUCE-4234
Project: Hadoop Map/Reduce
Issue Type: Improvement
Components: examples
Affects Versions: 0.23.3
Reporter: Randy Clayton
Priority: Minor
The SortValidator.java file checkRecords method creates a file in the
/tmp/sortvalidator directory using a static filename. This can result in
failures due to name collisions when the
hadoop-mapreduce-client-jobclient-*-tests jar is used by more than one task or
one user simultaneously. We use this jar when testing compression codecs and
after we started running tests in parallel (four at a time to reduce overall
test time) we started experiencing random test failures due to name collisions.
Creating a random or unique per thread filename may resolve this issue. We have
developed a change to introduce per use unique file names.
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