code: public synchronized boolean reloadAllConfig(boolean init)
        throws IOException, SAXException, ParserConfigurationException, JSONException {
      if (!isConfigChanged(init)) {
        return false;
      }
      reloadConfig();
      reloadPoolsConfig();
      this.lastSuccessfulReload = ClusterManager.clock.getTime();
      return true;
    }
docs: Reload all the configuration files if the config changed and
  set the last successful reload time.  Synchronized due to potential
  conflict from a fetch pools config http request.
  
  @return true if the config was reloaded, false otherwise
  @throws IOException
  @throws SAXException
  @throws ParserConfigurationException
  @param init true when the config manager is being initialized.
  false on reloads