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https://issues.apache.org/jira/browse/HDFS-15344?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17102786#comment-17102786
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Xiaoyu Yao commented on HDFS-15344:
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Also find a similar issue in RouterPermissionChecker#checkSuperuserPrivilege.
It could be fixed in the same patch but decide to open a separate so that we
can have a clean backport to branch-2 without router feature in future.
> DataNode#checkSuperuserPrivilege should use UGI#getGroups after HADOOP-13442
> ----------------------------------------------------------------------------
>
> Key: HDFS-15344
> URL: https://issues.apache.org/jira/browse/HDFS-15344
> Project: Hadoop HDFS
> Issue Type: Improvement
> Affects Versions: 2.7.5
> Reporter: Xiaoyu Yao
> Assignee: Xiaoyu Yao
> Priority: Major
>
> HADOOP-13442 added UGI#getGroups to avoid list->array->list conversions. This
> ticket is opened to change DataNode#checkSuperuserPrivilege to use
> UGI#getGroups.
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