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[jira] [Created] (HBASE-20654) Expose regions in transition thru JMX


Ted Yu created HBASE-20654:
------------------------------

             Summary: Expose regions in transition thru JMX
                 Key: HBASE-20654
                 URL: https://issues.apache.org/jira/browse/HBASE-20654
             Project: HBase
          Issue Type: Improvement
            Reporter: Ted Yu


Currently only the count of regions in transition is exposed thru JMX.
Here is a sample snippet of the /jmx output:
{code}
{
  "beans" : [ {
...
  }, {
    "name" : "Hadoop:service=HBase,name=Master,sub=AssignmentManager",
    "modelerType" : "Master,sub=AssignmentManager",
    "tag.Context" : "master",
...
    "ritCount" : 3
{code}
It would be desirable to expose region name, state for the regions in transition as well.
We can place configurable upper bound on the number of entries returned in case there're a lot of regions in transition.



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