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https://issues.apache.org/jira/browse/HADOOP-4490?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12654802#action_12654802
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Hemanth Yamijala commented on HADOOP-4490:
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bq.CREATE_TASK_DIR owen task_20080101_0001_m_000001_1
Owen, sure this makes sense. Just one point is that I might need the job id
along with the task id. But that's still within the same spirit.
I will also make the other changes you have suggested like blocking root user.
I've also added a CLEANUP_TASK_DIR command to the executable which is now able
to cleanup the directories after task is completed. This is called from the
CleanupQueue thread in task tracker.
> Map and Reduce tasks should run as the user who submitted the job
> -----------------------------------------------------------------
>
> Key: HADOOP-4490
> URL: https://issues.apache.org/jira/browse/HADOOP-4490
> Project: Hadoop Core
> Issue Type: Sub-task
> Components: mapred, security
> Reporter: Arun C Murthy
> Assignee: Hemanth Yamijala
>
> Currently the TaskTracker spawns the map/reduce tasks, resulting in them
> running as the user who started the TaskTracker.
> For security and accounting purposes the tasks should be run as the job-owner.
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