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https://issues.apache.org/jira/browse/HDFS-16881?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17654695#comment-17654695
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ASF GitHub Bot commented on HDFS-16881:
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szetszwo merged PR #5268:
URL: https://github.com/apache/hadoop/pull/5268
> Warn if AccessControlEnforcer runs for a long time to check permission
> ----------------------------------------------------------------------
>
> Key: HDFS-16881
> URL: https://issues.apache.org/jira/browse/HDFS-16881
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: namanode
> Reporter: Tsz-wo Sze
> Assignee: Tsz-wo Sze
> Priority: Major
> Labels: pull-request-available
>
> AccessControlEnforcer is configurable. If an external AccessControlEnforcer
> runs for a long time to check permission with the FSnamesystem lock, it will
> significantly slow down the entire Namenode. In the JIRA, we will print a
> WARN message when it happens.
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