Duo Zhang created HBASE-20722:

             Summary: Make RegionServerTracker only depends on children changed 
                 Key: HBASE-20722
                 URL: https://issues.apache.org/jira/browse/HBASE-20722
             Project: HBase
          Issue Type: Sub-task
            Reporter: Duo Zhang

For now we will use children changed event for adding RS, and node deleted 
event for removing RS. Actually, children changed can also be used for deleting 
RS, this will make it easier to control as we do not need to deal with the 
concurrency issue between the children changed and node deleted event.

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