public HRegionServer getOtherRegionServer(HRegionServer rs) {
    for (JVMClusterUtil.RegionServerThread rst : getMiniHBaseCluster().getRegionServerThreads()) {
      if (!(rst.getRegionServer() == rs)) {
        return rst.getRegionServer();
      }
    }
    return null;
  }
Find any other region server which is different from the one identified by parameter
@return another region server
hbase-server/src/test/java/org/apache/hadoop/hbase/HBaseTestingUtil.java