[jira] Created: (MAPREDUCE-1207) Allow admins to set java options for map/reduce tasks

["Arun C Murthy (JIRA)" <ji...@apache.org>]

Allow admins to set java options for map/reduce tasks
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                 Key: MAPREDUCE-1207
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1207
             Project: Hadoop Map/Reduce
          Issue Type: Improvement
          Components: client
            Reporter: Arun C Murthy


It will be useful for allow cluster-admins to set some java options for child map/reduce tasks. 

E.g. We've had to ask users to set -Djava.net.preferIPv4Stack=true in their jobs, it would be nice to do it for all users in such scenarios even when people override mapred.child.{map|reduce}.java.opts but forget to add this.

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