python - Windows Flask服务器程序关闭了之后，端口仍然偶尔出现处于监听状态

Question

服务器程序关闭了之后，端口仍然偶尔出现处于监听状态是啥意思？

1.flask启动配置

如下

app.run(debug=True,
            host='0.0.0.0',
            port=5800,
            threaded=True,
            processes=0,
            use_debugger=True,
            use_reloader=False)

结果如下：

如下图所示，偶尔会出现端口被占用的情况，但是我用任务管理器看了，进程确实不存在了

伊谢尔伦 · Answer

app.run comes with the framework and is only used for testing. It cannot be used during deployment

黄舟 · Answer

【Author's Statement】I found the reason

Using TCPView to monitor the process in real time, I found that a process named winvnc4.exe would occupy the port from time to time. Because the machine was very old, I didn’t know when this process was started and no one used it, so I deleted it and closed it. ,done