docs: @RequestMapping("/job-queue/load-add")
      public RestfulResponse loadJob(JobQueueReq request) {
          RestfulResponse response = new RestfulResponse();
  
          String nodeGroup = request.getTaskTrackerNodeGroup();
  
          HttpCmd httpCmd = new DefaultHttpCmd();
          httpCmd.setCommand(HttpCmdNames.HTTP_CMD_LOAD_JOB);
          httpCmd.addParam("nodeGroup", nodeGroup);
  
          List<Node> jobTrackerNodeList = appContext.getNodeMemCacheAccess().getNodeByNodeType(NodeType.JOB_TRACKER);
          if (CollectionUtils.isEmpty(jobTrackerNodeList)) {
              response.setMsg(I18nManager.getMessage("job.tracker.not.found"));
              response.setSuccess(false);
              return response;
          }
  
          boolean success = false;
          HttpCmdResponse cmdResponse = null;
          for (Node node : jobTrackerNodeList) {
              // 所有的JobTracker都load一遍
              httpCmd.setNodeIdentity(node.getIdentity());
              cmdResponse = HttpCmdClient.doGet(node.getIp(), node.getHttpCmdPort(), httpCmd);
              if (cmdResponse.isSuccess()) {
                  success = true;
              }
          }
          if (success) {
              response.setMsg("Load success");
          } else {
              response.setMsg("Load failed");
          }
          response.setSuccess(success);
          return response;
      }