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https://issues.apache.org/jira/browse/HADOOP-10087?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13828434#comment-13828434
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Yu Gao commented on HADOOP-10087:
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Hi Colin, thanks for the patch. It solves the reported problem.
> UserGroupInformation.getGroupNames() fails to return primary group first when
> JniBasedUnixGroupsMappingWithFallback is used
> ---------------------------------------------------------------------------------------------------------------------------
>
> Key: HADOOP-10087
> URL: https://issues.apache.org/jira/browse/HADOOP-10087
> Project: Hadoop Common
> Issue Type: Bug
> Components: security
> Affects Versions: 2.1.0-beta, 2.2.0
> Environment: SUSE Linux Enterprise Server 11 (x86_64)
> Reporter: Yu Gao
> Assignee: Colin Patrick McCabe
> Labels: security
> Attachments: HADOOP-10087.001.patch
>
>
> When JniBasedUnixGroupsMappingWithFallback is used as the group mapping
> resolution provider, UserGroupInformation.getGroupNames() fails to return the
> primary group first in the list as documented.
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