docs: public void update(boolean needJvmInfo) {
  		if (state == VMInfoState.ERROR_DURING_ATTACH || state == VMInfoState.DETACHED) {
  			return;
  		}
  
  		try {
  			int lastJmxErrorCount = jmxUpdateErrorCount;
  			// 将UPDTATE_ERROR重置开始新一轮循环
  			state = VMInfoState.ATTACHED;
  
  			// 清空JMX内部缓存
  			jmxClient.flush();
  
  			updateUpTime();
  
  			if (needJvmInfo) {
  				if (isLinux) {
  					updateProcessStatus();
  					updateIO();
  				}
  
  				updateCpu();
  				updateThreads();
  				updateClassLoader();
  				updateMemoryPool();
  				updateGC();
  				updateSafepoint();
  			}
  
  			// 无新异常，状态重新判定为正常
  			if (jmxUpdateErrorCount == lastJmxErrorCount) {
  				jmxUpdateErrorCount = 0;
  			}
  		} catch (Throwable e) {
  			// 其他非JMX异常，直接退出
  			e.printStackTrace();
  			System.out.flush();
  			state = VMInfoState.DETACHED;
  		}
  	}