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https://issues.apache.org/jira/browse/HDFS-9415?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15096968#comment-15096968
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Daniel Templeton commented on HDFS-9415:
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Just because there's a test case, it doesn't mean it's a valid configuration.
In the case of ' * ', the string is split on the first space, giving a user of
'' and a group of '* '. The group is then trimmed before splitting on comma,
giving groups of \['*'\]. That's a long way to say that ' * ' is a poorly
formatted version of ' *' and hence should not be mentioned in the docs.
> Document dfs.cluster.administrators and dfs.permissions.superusergroup
> ----------------------------------------------------------------------
>
> Key: HDFS-9415
> URL: https://issues.apache.org/jira/browse/HDFS-9415
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: documentation
> Reporter: Arpit Agarwal
> Assignee: Xiaobing Zhou
> Attachments: HDFS-9415.001.patch, HDFS-9415.002.patch,
> HDFS-9415.003.patch
>
>
> dfs.cluster.administrators and dfs.permissions.superusergroup documentation
> is not clear enough.
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