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Robert Joseph Evans commented on MAPREDUCE-4493: ------------------------------------------------ Sorry I meant documentation not configuration. > Distibuted Cache Compatability Issues > ------------------------------------- > > Key: MAPREDUCE-4493 > URL: https://issues.apache.org/jira/browse/MAPREDUCE-4493 > Project: Hadoop Map/Reduce > Issue Type: Bug > Components: mrv2 > Affects Versions: 0.23.3, 2.0.0-alpha, 3.0.0 > Reporter: Robert Joseph Evans > Assignee: Robert Joseph Evans > Priority: Critical > > The distributed cache does not work like it does in 1.0. > mapreduce.job.cache.symlink.create is completely ignored and symlinks are > always created no matter what. Files and archives without a fragment will > also have symlinks created. > If two cache archives or cache files happen to have the same name, or same > symlink fragment only the last one in the list is localized. > The localCacheArchives and LocalCacheFiles are not set correctly when these > duplicates happen causing off by one or more errors for anyone trying to use > them. > The reality is that use of symlinking is so common currently that these > incompatibilities are not that likely to show up, but we still need to fix > them. -- 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