mapred.system.dir should be accessible only to hadoop daemons
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Key: HADOOP-3578
URL: https://issues.apache.org/jira/browse/HADOOP-3578
Project: Hadoop Core
Issue Type: Bug
Components: mapred
Reporter: Amar Kamat
Currently the jobclient accesses the {{mapred.system.dir}} to add job details.
Hence the {{mapred.system.dir}} has the permissions of {{rwx-wx-wx}}. This
could be a security loophole where the job files might get overwritten/tampered
after the job submission.
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