private void decrementMinRegionServerCount() {
    // decrement the count for this.conf, for newly spwaned master
    // this.hbaseCluster shares this configuration too
    decrementMinRegionServerCount(getConfiguration());

    // each master thread keeps a copy of configuration
    for (MasterThread master : getHBaseCluster().getMasterThreads()) {
      decrementMinRegionServerCount(master.getMaster().getConfiguration());
    }
  }
Expire a region server's session
@param index which RS
hbase-server/src/test/java/org/apache/hadoop/hbase/HBaseTestingUtil.java