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From "Bikas Saha (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-8234) Enable user group mappings on Windows
Date Wed, 04 Apr 2012 20:13:23 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-8234?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13246684#comment-13246684

Bikas Saha commented on HADOOP-8234:

Hadoop has a GroupMappingServiceProvider interface that is used to get group mappings. The
commonly used real implementation of that interface is a Shell based mapper that executes
shell commands to obtain this information. There has been some work on LDAP and Active Directory
based mappers in the community. The Shell based mapper can be made to work on Windows in the
following ways
1)	Map every user to the same group, say “HadoopUsers”. Currently, this is what has been
hard coded and it could be changed to be a configurable group name.
2)	Use Windows commands like “net user” to provide the group membership of a given user.
This provides both local group memberships and global group memberships. I propose we use
this method since it’s a natural extension of the existing feature. It also leverages built-in
support on Windows for gathering such information.

> Enable user group mappings on Windows
> -------------------------------------
>                 Key: HADOOP-8234
>                 URL: https://issues.apache.org/jira/browse/HADOOP-8234
>             Project: Hadoop Common
>          Issue Type: Sub-task
>          Components: native
>    Affects Versions: 1.0.0
>            Reporter: Bikas Saha
>            Assignee: Bikas Saha
> The initial patch submitted is missing mapping of users to groups. A number of test failures
are related to this. The jira tracks adding this support.

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