Erik Krogen created HDFS-12746:
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             Summary: 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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