💛环境：window10、CentOs7.5.1804

💦专栏：linux_debug

1.错误信息

2022-07-08 18:12:25.088 ERROR 33600 --- [           main] o.s.boot.SpringApplication               : Application run failed

org.springframework.context.ApplicationContextException: Failed to start bean 'webServerStartStop'; nested exception is org.springframework.boot.web.server.WebServerException: Unable to start embedded Tomcat server
	at org.springframework.context.support.DefaultLifecycleProcessor.doStart(DefaultLifecycleProcessor.java:181) ~[spring-context-5.3.21.jar!/:5.3.21]
	at org.springframework.context.support.DefaultLifecycleProcessor.access$200(DefaultLifecycleProcessor.java:54) ~[spring-context-5.3.21.jar!/:5.3.21]
	at org.springframework.context.support.DefaultLifecycleProcessor$LifecycleGroup.start(DefaultLifecycleProcessor.java:356) ~[spring-context-5.3.21.jar!/:5.3.21]
	at java.lang.Iterable.forEach(Iterable.java:75) ~[na:1.8.0_333]
	at org.springframework.context.support.DefaultLifecycleProcessor.startBeans(DefaultLifecycleProcessor.java:155) ~[spring-context-5.3.21.jar!/:5.3.21]
	at org.springframework.context.support.DefaultLifecycleProcessor.onRefresh(DefaultLifecycleProcessor.java:123) ~[spring-context-5.3.21.jar!/:5.3.21]

2. 问题说明

在linux上运行springboot项目打成的jar包时；

• 出现上述问题，说明8080端口被占用；

3.解决方法

关闭被占用的8080端口；

3.1 windows

• 在cmd中输入

# 找到对应的pid
netstat -ano | findstr 8080

## out：TCP 0.0.0.0:8080 0.0.0.0:0 LISTENING 6148

• 关闭端口对应的pid号，假设端口8080对应的是进程号为123的进程号

taskkill /pid 6148 -t -f

3.2 linux

• 在cmd中输入

# 找到对应的pid
netstat -ano | grep 8080

## out：TCP 0.0.0.0:8080 0.0.0.0:0 LISTENING 6148

• 关闭端口对应的pid号，假设端口8080对应的是进程号为123的进程号

kill -9 PID 123