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From "Boris Shkolnik (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-4656) Add a user to groups mapping service
Date Wed, 25 Nov 2009 22:59:39 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-4656?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Boris Shkolnik updated HADOOP-4656:
-----------------------------------

    Attachment: HADOOP-4656-2.patch

Removed Timer thread for refreshing cache of groups mapping. Instead using lazy approach -
verifying cacheTimeout on access.

Also implemented few comments form Jakob:
1. removed author tag
2. using CommonConfigurationKeys constants for conf.keys.

> Add a user to groups mapping service 
> -------------------------------------
>
>                 Key: HADOOP-4656
>                 URL: https://issues.apache.org/jira/browse/HADOOP-4656
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: security
>    Affects Versions: 0.19.0
>            Reporter: Arun C Murthy
>            Assignee: Boris Shkolnik
>         Attachments: HADOOP-4656-1.patch, HADOOP-4656-2.patch, HADOOP-4656.patch, HADOOP-4656_0_20090108.patch
>
>
> Currently the IPC client sends the UGI which contains the user/group information for
the Server. However this represents the groups for the user on the client-end. The more pertinent
mapping from user to groups is actually the one seen by the Server. Hence the client should
only send the user and we should add a 'group mapping service' so that the Server can query
it for the mapping.

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