code: @Override
  	public String getWebInterfaceURL() {
  		try {
  			return getWebMonitorBaseUrl().get().toString();
  		} catch (InterruptedException | ExecutionException e) {
  			ExceptionUtils.checkInterrupted(e);
  
  			log.warn("Could not retrieve the web interface URL for the cluster.", e);
  			return "Unknown address.";
  		}
  	}
docs: ======================================