map/reduce clients should not access the system dir directly
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                 Key: HADOOP-3626
                 URL: https://issues.apache.org/jira/browse/HADOOP-3626
             Project: Hadoop Core
          Issue Type: Improvement
          Components: mapred
            Reporter: Owen O'Malley


Map/Reduce's use of the system directory with clients creating directories and 
files directly is very insecure. We should change the job client to create a 
staging directory in the user's home directory on the same file system as the 
system directory. 

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