code: @Deprecated
    public static String getClientHostName(AlluxioConfiguration conf) {
      if (conf.isSet(PropertyKey.USER_HOSTNAME)) {
        return conf.get(PropertyKey.USER_HOSTNAME);
      }
      return getLocalHostName((int) conf.getMs(PropertyKey.NETWORK_HOST_RESOLUTION_TIMEOUT_MS));
    }
docs: Gets the local hostname to be used by the client. If this isn't configured, a
  non-loopback local hostname will be looked up.
  
  @param conf Alluxio configuration
  @return the local hostname for the client
  @deprecated This should not be used anymore as the USER_HOSTNAME key is deprecated