在服务器上运行jar包失败，重启服务器解决。

报错：：

Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled. 2020-10-20 19:26:30.855 ERROR 3634 --- [ main] o.s.b.d.LoggingFailureAnalysisReporter : *************************** APPLICATION FAILED TO START *************************** Description: Web server failed to start. Port 8888 was already in use.

打开阿里云中自己的服务器，进行重启。 重新连接，再次运行jar包成功。