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Posted to hdfs-issues@hadoop.apache.org by "Daryn Sharp (JIRA)" <ji...@apache.org> on 2013/09/20 16:47:52 UTC

[jira] [Created] (HDFS-5241) Provide alternate queuing audit logger to reduce logging contention

Daryn Sharp created HDFS-5241:
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             Summary: 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


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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