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https://issues.apache.org/jira/browse/ZOOKEEPER-1260?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16612315#comment-16612315
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Mohammad Arshad commented on ZOOKEEPER-1260:
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>From the performance readings, seems performance impact very less when feature 
>is disabled.

> Audit logging in ZooKeeper servers.
> -----------------------------------
>
>                 Key: ZOOKEEPER-1260
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-1260
>             Project: ZooKeeper
>          Issue Type: New Feature
>          Components: server
>            Reporter: Mahadev konar
>            Assignee: Mohammad Arshad
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 3.6.0, 3.5.5
>
>         Attachments: ZOOKEEPER-1260-01.patch, zookeeperAuditLogs.pdf
>
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> Lots of users have had questions on debugging which client changed what znode 
> and what updates went through a znode. We should add audit logging as in 
> Hadoop (look at Namenode Audit logging) to log which client changed what in 
> the zookeeper servers. This could just be a log4j audit logger.



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