Erik Krogen created HDFS-11021:

             Summary: Add FSNamesystemLock metrics for BlockManager operations
                 Key: HDFS-11021
             Project: Hadoop HDFS
          Issue Type: Sub-task
          Components: namenode
            Reporter: Erik Krogen
            Assignee: Erik Krogen

Right now the operations which the {{BlockManager}} issues to the 
{{Namesystem}} will not emit metrics about which operation caused the 
{{FSNamesystemLock}} to be held; they are all grouped under "OTHER". We should 
fix this since the {{BlockManager}} creates many acquisitions of both the read 
and write locks. 

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