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https://issues.apache.org/jira/browse/HADOOP-4490?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12653327#action_12653327
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Hemanth Yamijala commented on HADOOP-4490:
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Steve, I do agree that the security manager approach is simpler and portable.
However, I think the requirement is also to support features like streaming.
Given that, I think the security manager approach would not work. Am I right ?
Also, I agree that authentication and authorization is a pre-requisite for
this. It is being handled by the other tasks under the jira HADOOP-4487. Here,
I am focussing only on the mechanisms to make tasks run as the users who
submitted the jobs - a small part of the larger framework.
> 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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