docs: private CommunicationParam buildParams(String addr) {
          CommunicationParam params = new CommunicationParam();
          String[] strs = StringUtils.split(addr, ":");
          if (strs == null || strs.length != 2) {
              throw new IllegalArgumentException("addr example: 127.0.0.1:1099");
          }
          InetAddress address = null;
          try {
              address = InetAddress.getByName(strs[0]);
          } catch (UnknownHostException e) {
              throw new CommunicationException("addr_error", "addr[" + addr + "] is unknow!");
          }
          params.setIp(address.getHostAddress());
          params.setPort(Integer.valueOf(strs[1]));
          return params;
      }