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From "Owen O'Malley (JIRA)" <j...@apache.org>
Subject [jira] Commented: (MAPREDUCE-1440) MapReduce should use the short form of the user names
Date Tue, 02 Feb 2010 21:42:18 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-1440?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12828780#action_12828780
] 

Owen O'Malley commented on MAPREDUCE-1440:
------------------------------------------

The multi-realm case is why we need the mapping. MapReduce needs a unique local username to
run the processes as. The local name is the user that the task runs as and determines the
groups. Any authentication names that merge into a single local username, need to be the same
person.

> MapReduce should use the short form of the user names
> -----------------------------------------------------
>
>                 Key: MAPREDUCE-1440
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1440
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>          Components: security
>            Reporter: Owen O'Malley
>             Fix For: 0.22.0
>
>         Attachments: m-1440.patch
>
>
> To minimize disruption on MapReduce, we should use the local names (ie. "omalley") rather
than the long names (ie. "omalley@APACHE.ORG" as the basis for the username in MapReduce.

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