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Posted to mapreduce-dev@hadoop.apache.org by "Todd Lipcon (JIRA)" <ji...@apache.org> on 2010/12/15 23:12:02 UTC

[jira] Created: (MAPREDUCE-2219) JT should not try to remove mapred.system.dir during startup

JT should not try to remove mapred.system.dir during startup
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                 Key: MAPREDUCE-2219
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-2219
             Project: Hadoop Map/Reduce
          Issue Type: Bug
          Components: jobtracker
    Affects Versions: 0.22.0
            Reporter: Todd Lipcon


During startup, the JT tries to clean up mapred.system.dir by recursively removing it and then recreating it. This requires that mapred.system.dir is inside a directory owned by the mapred user. For example, if set to /system/mapred then /system must be owned by the mapred account. This isn't documented properly and also seems unnecessary. Instead we can remove the *contents* of mapred.system.dir instead of the directory itself.

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