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

["Krishna Ramachandran (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/MAPREDUCE-1207?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Krishna Ramachandran updated MAPREDUCE-1207:
--------------------------------------------

    Attachment: mapred-1207.patch

With this patch cluster admin can configure these 

mapreduce.admin.user.shell
mapreduce.admin.user.home.dir

and any custom environment variable using

mapreduce.admin.user.env



> Allow admins to set java options for map/reduce tasks
> -----------------------------------------------------
>
>                 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
>            Assignee: Krishna Ramachandran
>         Attachments: mapred-1207.patch
>
>
> 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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