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From "Owen O'Malley (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-7987) Support setting the run-as user in unsecure mode
Date Fri, 20 Jan 2012 22:08:39 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-7987?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13190165#comment-13190165
] 

Owen O'Malley commented on HADOOP-7987:
---------------------------------------

Actually, this is a pretty different solution in practice, although it allows a lot of the
same abilities. This is just a change to UGI that lets you override the current user lookup
in the HadoopLoginModule. Obviously, the change only works in non-secure mode and probably
should be done with an environment variable such as HADOOP_USER.
                
> Support setting the run-as user in unsecure mode
> ------------------------------------------------
>
>                 Key: HADOOP-7987
>                 URL: https://issues.apache.org/jira/browse/HADOOP-7987
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: security
>    Affects Versions: 1.0.0
>            Reporter: Devaraj Das
>             Fix For: 1.1.0
>
>
> Some applications need to be able to perform actions (such as launch MR jobs) from map
or reduce tasks. In earlier unsecure versions of hadoop (20.x), it was possible to do this
by setting user.name in the configuration. But in 20.205 and 1.0, when running in unsecure
mode, this does not work. (In secure mode, you can do this using the kerberos credentials).

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