dengsc created HDFS-13905:
-----------------------------

             Summary: HDFS NameNode jmx information inaccuracy
                 Key: HDFS-13905
                 URL: https://issues.apache.org/jira/browse/HDFS-13905
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: nn
            Reporter: dengsc


The information obtained using Namenode jmx does not match the actual situation。

jmx json data:
{code:java}
// http://{namenode_ip}:50070/jmx/?qry=Hadoop:service=NameNode,name=BlockStats
{
  "beans" : [ {
    "name" : "Hadoop:service=NameNode,name=BlockStats",
    "modelerType" : 
"org.apache.hadoop.hdfs.server.blockmanagement.BlockManager",
    "StorageTypeStats" : [ {
      "key" : "ARCHIVE",
      "value" : {
        "blockPoolUsed" : 10411907414335294,
        "capacityRemaining" : 1435938815980942,
        "capacityTotal" : 11851673443205120,
        "capacityUsed" : 10411907414335294,
        "nodesInService" : 111
      }
    }, {
      "key" : "DISK",
      "value" : {
        "blockPoolUsed" : 16789505803398474,
        "capacityRemaining" : 3404376930515479,
        "capacityTotal" : 20204114325184512,
        "capacityUsed" : 16789505803398474,
        "nodesInService" : 473
      }
    } ]
  } ]
}
{code}
but ,in our cluster :

disk nodesInService = 462

archive nodesInService = 110



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