docs: protected String getErrorMessage(Exception e) {
  
  		String ip;
  		try {
  			ip = InetAddress.getByName(server.split(":")[0]).getHostAddress();
  		}
  		catch (UnknownHostException e1) {
  			ip = null;
  			// throw new RuntimeException(e1.getMessage(), e1);
  		}
  		String message = "server:" + server + " ip:" + ip + " messsage:" + e.getMessage();
  		logger.error(message);
  		return message;
  	}