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https://issues.apache.org/jira/browse/HADOOP-8932?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13477094#comment-13477094
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Kihwal Lee commented on HADOOP-8932:
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No test is included since the change is about log message.
> JNI-based user-group mapping modules can be too chatty on lookup failures
> -------------------------------------------------------------------------
>
> Key: HADOOP-8932
> URL: https://issues.apache.org/jira/browse/HADOOP-8932
> Project: Hadoop Common
> Issue Type: Improvement
> Components: security
> Affects Versions: 3.0.0, 2.0.3-alpha, 0.23.5
> Reporter: Kihwal Lee
> Assignee: Kihwal Lee
> Attachments: hadoop-8932.patch.txt
>
>
> On a user/group lookup failure, JniBasedUnixGroupsMapping and
> JniBasedUnixGroupsNetgroupMapping are logging the
> full stack trace at WARN level. Since the caller of these methods is already
> logging errors, this is not needed. In branch-1, just one line is logged, so
> we don't need this change there.
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