code: public void setUrl(String url) throws IOException {
      if (failException != null) {
        throw failException;
      }
  
      sessionInfo.url = url;
  
      SessionInfo newInfo = new SessionInfo(sessionInfo);
      cmNotifier.addCall(
        new ClusterManagerService.sessionUpdateInfo_args(sessionId, newInfo));
    }
docs: Set the URL for this session in the ClusterManager
  @param url the url of this session
  @throws IOException