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https://issues.apache.org/jira/browse/HDFS-5241?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13800971#comment-13800971
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Kihwal Lee commented on HDFS-5241:
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+1 The patch looks good. [~sureshms], do you think it is acceptable since it is
off by default and not exposed to regular users?
> Provide alternate queuing audit logger to reduce logging contention
> -------------------------------------------------------------------
>
> Key: HDFS-5241
> URL: https://issues.apache.org/jira/browse/HDFS-5241
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: namenode
> Affects Versions: 2.0.0-alpha, 3.0.0
> Reporter: Daryn Sharp
> Assignee: Daryn Sharp
> Attachments: HDFS-5241.patch
>
>
> The default audit logger has extremely poor performance. The internal
> synchronization of log4j causes massive contention between the call handlers
> (100 by default) which drastically limits the throughput of the NN.
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