Implement setuid executable for Linux to assist in launching tasks as job owners
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                 Key: HADOOP-4930
                 URL: https://issues.apache.org/jira/browse/HADOOP-4930
             Project: Hadoop Core
          Issue Type: Task
          Components: mapred
            Reporter: Hemanth Yamijala
            Assignee: Sreekanth Ramakrishnan


HADOOP-4490 tracks the design and implementation of launching tasks as job 
owners. As per discussion there, the proposal is to implement a setuid 
executable for Linux that would be launched by the tasktracker to run tasks as 
the job owners. In this task we will track the implementation of the setuid 
executable. HADOOP-4490 will be used to track changes in the tasktracker.

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