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Date: Fri, 2 Sep 2011 16:01:10 +0000 (UTC)
From: "Allen Wittenauer (JIRA)" <jira@apache.org>
To: common-issues@hadoop.apache.org
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Subject: [jira] [Commented] (HADOOP-7603) Set default hdfs, mapred uid, and
 hadoop group gid for RPM packages
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    [ https://issues.apache.org/jira/browse/HADOOP-7603?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13096074#comment-13096074 ] 

Allen Wittenauer commented on HADOOP-7603:
------------------------------------------

bq. What group uses 49?

wnn uses it:

http://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/6/html/Deployment_Guide/s1-users-groups-standard-users.html


> Set default hdfs, mapred uid, and hadoop group gid for RPM packages
> -------------------------------------------------------------------
>
>                 Key: HADOOP-7603
>                 URL: https://issues.apache.org/jira/browse/HADOOP-7603
>             Project: Hadoop Common
>          Issue Type: Bug
>         Environment: Java, Redhat EL, Ubuntu
>            Reporter: Eric Yang
>            Assignee: Eric Yang
>
> Hadoop rpm package creates hdfs, mapped users, and hadoop group for automatically setting up pid directory and log directory with proper permission.  The default headless users should have a fixed uid, and gid numbers defined.
> Searched through the standard uid and gid on both Redhat and Debian distro.  It looks like:
> {noformat}
> uid: 201 for hdfs
> uid: 202 for mapred
> gid: 49 for hadoop
> {noformat}
> would be free for use.

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