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From "Jason Lowe (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-5265) Need an admin interface on history server with the ability to refresh super user groups,refresh user to group mappings,refresh admin acls,get groups given a username.
Date Mon, 15 Jul 2013 18:16:57 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-5265?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13708763#comment-13708763
] 

Jason Lowe commented on MAPREDUCE-5265:
---------------------------------------

bq. I found that I was not able to use HDFS classes in History server since the former is
not added as a dependency to the latter,which makes sense. Ideally we would want move these
protocol classes to common and then derive it in HDFS and History server.

Agreed, rather than have hadoop-mapreduce-client-hs depend upon the HDFS project just for
this, let's move the HDFS protocols to common so they are more readily reusable.  I'll file
a separate JIRA.

If we are going to duplicate this code in the short-term, we need to mark them package private
or otherwise annotate them so it's clear these should not be used outside of the hs package
(because they'd be going away soon).
                
> Need an admin interface on history server with the ability to refresh super user groups,refresh
user to group mappings,refresh admin acls,get groups given a username.
> ----------------------------------------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-5265
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-5265
>             Project: Hadoop Map/Reduce
>          Issue Type: New Feature
>          Components: jobhistoryserver
>    Affects Versions: 2.1.0-beta
>            Reporter: Jason Lowe
>            Assignee: Ashwin Shankar
>         Attachments: JHS_REFRESH-10.txt, JHS_REFRESH-2.txt, JHS_REFRESH-4.txt, JHS_REFRESH-6.txt,
JHS_REFRESH-8.txt, JHS_REFRESH-9.txt
>
>
> The history server needs an admin interface with the ability to
> 1. refresh the super user groups configurations,
> 2. refresh user to group mappings,
> 3. refresh its admin acls,
> 4. get groups given a username 
> without requiring a restart of the history server.  This is analogous to the  -refreshSuperUserGroupsConfiguration
capabilities provided by hdfs dfsadmin and yarn rmadmin. 

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