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Posted to hdfs-issues@hadoop.apache.org by "Daryn Sharp (JIRA)" <ji...@apache.org> on 2014/01/23 18:30:40 UTC

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

     [ https://issues.apache.org/jira/browse/HDFS-5241?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Daryn Sharp updated HDFS-5241:
------------------------------

      Resolution: Fixed
    Hadoop Flags: Reviewed
          Status: Resolved  (was: Patch Available)

Committed to trunk and branch-2.

> 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, 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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