docs: public void updateTaskTrackerAvailableThreads(
              String nodeGroup,
              String identity,
              Integer availableThreads,
              Long timestamp) {
  
          Set<TaskTrackerNode> taskTrackerNodes = NODE_MAP.get(nodeGroup);
  
          if (taskTrackerNodes != null && taskTrackerNodes.size() != 0) {
              for (TaskTrackerNode trackerNode : taskTrackerNodes) {
                  if (trackerNode.getIdentity().equals(identity) && (trackerNode.getTimestamp() == null || trackerNode.getTimestamp() <= timestamp)) {
                      trackerNode.setAvailableThread(availableThreads);
                      trackerNode.setTimestamp(timestamp);
                      if (LOGGER.isDebugEnabled()) {
                          LOGGER.debug("更新节点线程数: {}", trackerNode);
                      }
                  }
              }
          }
      }