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https://issues.apache.org/jira/browse/HDFS-12746?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16225664#comment-16225664
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Erik Krogen commented on HDFS-12746:
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Thanks for the feedback [~anu]! I agree with you about logging all commands;
this is pretty much what I had in mind.
I'm not sure about machine readable. Did you have something specific in mind? I
was thinking that this should follow the format of the other audit logs, e.g. a
set of a key-value pairs separated by equals. But maybe this is a good
opportunity to develop something better; the lack of easily parseable format on
the NN's audit logs has been an annoyance for quite some time.
> DataNode Audit Logger
> ---------------------
>
> Key: HDFS-12746
> URL: https://issues.apache.org/jira/browse/HDFS-12746
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: datanode, logging
> Reporter: Erik Krogen
>
> I would like to discuss adding in an audit logger for the Datanodes. We have
> audit logging on pretty much all other components: Namenode, ResourceManager,
> NodeManager. It seems the DN should have a similar concept to log, at
> minimum, all block reads/writes. I think all of the interesting information
> does already appear in the DN logs at INFO level but it would be nice to have
> a specific audit class that this gets logged through, a la {{RMAuditLogger}}
> and {{NMAuditLogger}}, to enable special handling.
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