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From "Todd Lipcon (JIRA)" <j...@apache.org>
Subject [jira] Created: (MAPREDUCE-2219) JT should not try to remove mapred.system.dir during startup
Date Wed, 15 Dec 2010 22:12:02 GMT
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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