Description: Web server failed to start. Port 48009 was already in use. Action: Identify and stop
完整错误：
Description:
Web server failed to start. Port 48009 was already in use.
Action:
Identify and stop the process that's listening on port 48009 or configure this application to listen on another port.
2020-07-15 16:25:01.793 [main] INFO o.s.scheduling.concurrent.ThreadPoolTaskExecutor - Shutting down ExecutorService 'applicationTaskExecutor'
意思是48009说你这个端口被占用了
怎么解决了，开始吧
首先打开win+r打开cmd命令窗口
输入 netstat -ano 回车
找到48009的端口对应服务的ip 11256
右键双击左下方打开任务管理器
选择详细信息找到pid为11256进程点击右键结束任务
到此，这个问题就解决了。