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Hudson commented on HADOOP-4656:
--------------------------------
Integrated in Hadoop-Common-trunk #191 (See [http://hudson.zones.apache.org/hudson/job/Hadoop-Common-trunk/191/])
. Add a user to groups mapping service (boryas and acmurthy_)
> 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
> Fix For: 0.22.0
>
> Attachments: HADOOP-4656-1.patch, HADOOP-4656-2.patch, HADOOP-4656-4.patch, HADOOP-4656-6.patch,
HADOOP-4656-6.patch, HADOOP-4656-7.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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