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https://issues.apache.org/jira/browse/HADOOP-6864?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12972251#action_12972251
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Boris Shkolnik commented on HADOOP-6864:
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+1
> 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-6864-0.22-1.patch,
> HADOOP-6864-0.22-2.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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