private static String getZKQuorumServersStringFromHbaseConfig(Configuration conf) {
    String defaultClientPort = Integer.toString(
      conf.getInt(HConstants.ZOOKEEPER_CLIENT_PORT, HConstants.DEFAULT_ZOOKEEPER_CLIENT_PORT));

    // Build the ZK quorum server string with "server:clientport" list, separated by ','
    final String[] serverHosts = conf.getStrings(HConstants.ZOOKEEPER_QUORUM, HConstants.LOCALHOST);
    return buildZKQuorumServerString(serverHosts, defaultClientPort);
  }
Return the ZK Quorum servers string given the specified configuration
@return Quorum servers String
hbase-common/src/main/java/org/apache/hadoop/hbase/zookeeper/ZKConfig.java