@Override
  public String getZookeeperQuorum() {
    ZKWatcher zk = master.getZooKeeper();
    if (zk == null) {
      return "";
    }
    return zk.getQuorum();
  }
Impl for exposing HMaster Information through JMX
hbase-server/src/main/java/org/apache/hadoop/hbase/master/MetricsMasterWrapperImpl.java