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From "Erik Steffl (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-6864) Provide a JNI-based implementation of ShellBasedUnixGroupsNetgroupMapping (implementation of GroupMappingServiceProvider)
Date Fri, 12 Nov 2010 01:35:14 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-6864?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12931297#action_12931297
] 

Erik Steffl commented on HADOOP-6864:
-------------------------------------

Re https://issues.apache.org/jira/browse/HADOOP-6864?focusedCommentId=12931296&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#action_12931296

Sorry for confusion, HADOOP-6884 should have been HADOOP-6864. The rest of the comment is
valid.

> Provide a JNI-based implementation of ShellBasedUnixGroupsNetgroupMapping (implementation
of GroupMappingServiceProvider)
> -------------------------------------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-6864
>                 URL: https://issues.apache.org/jira/browse/HADOOP-6864
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: security
>            Reporter: Erik Steffl
>             Fix For: 0.22.0
>
>         Attachments: HADOOP-6864-0.20.1xx-1.patch, HADOOP-6864-0.20.1xx.patch, HADOOP-6864-0.22.patch
>
>
> The netgroups implementation of GroupMappingServiceProvider (see ShellBasedUnixGroupsNetgroupMapping.java)
does a fork of a unix command to get the netgroups of a user. Since the group resolution happens
in the servers, this might be costly. This jira aims at providing a JNI-based implementation
for GroupMappingServiceProvider.
> Note that this is similar to what https://issues.apache.org/jira/browse/HADOOP-6818 does
for implementation of GroupMappingServiceProvider that  supports only unix groups.

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