liuguanghua created HDFS-17170:
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             Summary: add metris for datanode in function processQueueMessages 
and reportTo
                 Key: HDFS-17170
                 URL: https://issues.apache.org/jira/browse/HDFS-17170
             Project: Hadoop HDFS
          Issue Type: Improvement
            Reporter: liuguanghua


Add two metrics for datanode:

(1)BPServiceActorAction.reportTo  will  execute errorReport and 
reportBadBlocks, record the counts of it.

 (2) BPServiceActor.processQueueMessages in the loop with heartbeat to 
NN,should recore the numOps and time.



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