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Jonathan Eagles commented on MAPREDUCE-4234: -------------------------------------------- The coding changes look good at first glance. I will take a deeper look at the usage. > 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, trunk > Reporter: Randy Clayton > Assignee: Robert Joseph Evans > Priority: Minor > Attachments: MAPREDUCE-4234.patch, MR-4234.txt, MR-4234.txt > > > 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. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa For more information on JIRA, see: http://www.atlassian.com/software/jira