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-5.3.13.jar!/:5.3.13] at org.springframework.context.support.DefaultLifecycleProcessor.access$200(DefaultLifecycleProcessor.java:54) ~[spring-context-5.3.13.jar!/:5.3.13] at org.springframework.context.support.DefaultLifecycleProcessor$LifecycleGroup.start(DefaultLifecycleProcessor.java:356) ~[spring-context-5.3.13.jar!/:5.3.13] at java.lang.Iterable.forEach(Iterable.java:75) ~[na:1.8.0_171] at org.springframework.context.support.DefaultLifecycleProcessor.startBeans(DefaultLifecycleProcessor.java:155) ~[spring-context-5.3.13.jar!/:5.3.13] at org.springframework.context.support.DefaultLifecycleProcessor.onRefresh(DefaultLifecycleProcessor.java:123) ~[spring-context-5.3.13.jar!/:5.3.13] at org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:935) ~[spring-context-5.3.13.jar!/:5.3.13] at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:586) ~[spring-context-5.3.13.jar!/:5.3.13] at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:145) ~[spring-boot-2.5.7.jar!/:2.5.7] at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:765) [spring-boot-2.5.7.jar!/:2.5.7] at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:445) [spring-boot-2.5.7.jar!/:2.5.7] at org.springframework.boot.SpringApplication.run(SpringApplication.java:338) [spring-boot-2.5.7.jar!/:2.5.7] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1354) [spring-boot-2.5.7.jar!/:2.5.7] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1343) [spring-boot-2.5.7.jar!/:2.5.7] at com.pn.boot.MybatisLogApplication.main(MybatisLogApplication.java:12) [classes!/:0.0.1-SNAPSHOT] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_171] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_171] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_171] at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_171] at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:49) [3-boot-mybatis-log-0.0.1-SNAPSHOT.jar:0.0.1-SNAPSHOT] at org.springframework.boot.loader.Launcher.launch(Launcher.java:108) [3-boot-mybatis-log-0.0.1-SNAPSHOT.jar:0.0.1-SNAPSHOT] at org.springframework.boot.loader.Launcher.launch(Launcher.java:58) [3-boot-mybatis-log-0.0.1-SNAPSHOT.jar:0.0.1-SNAPSHOT] at org.springframework.boot.loader.JarLauncher.main(JarLauncher.java:88) [3-boot-mybatis-log-0.0.1-SNAPSHOT.jar:0.0.1-SNAPSHOT] Caused by: org.springframework.boot.web.server.WebServerException: Unable to start embedded Tomcat server at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.start(TomcatWebServer.java:229) ~[spring-boot-2.5.7.jar!/:2.5.7] at org.springframework.boot.web.servlet.context.WebServerStartStopLifecycle.start(WebServerStartStopLifecycle.java:43) ~[spring-boot-2.5.7.jar!/:2.5.7] at org.springframework.context.support.DefaultLifecycleProcessor.doStart(DefaultLifecycleProcessor.java:178) ~[spring-context-5.3.13.jar!/:5.3.13] ... 22 common frames omitted Caused by: java.lang.IllegalArgumentException: standardService.connector.startFailed at org.apache.catalina.core.StandardService.addConnector(StandardService.java:238) ~[tomcat-embed-core-9.0.55.jar!/:na] at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.addPreviouslyRemovedConnectors(TomcatWebServer.java:282) ~[spring-boot-2.5.7.jar!/:2.5.7] at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.start(TomcatWebServer.java:213) ~[spring-boot-2.5.7.jar!/:2.5.7] ... 24 common frames omitted Caused by: org.apache.catalina.LifecycleException: Protocol handler start failed at org.apache.catalina.connector.Connector.startInternal(Connector.java:1075) ~[tomcat-embed-core-9.0.55.jar!/:na] at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) ~[tomcat-embed-core-9.0.55.jar!/:na] at org.apache.catalina.core.StandardService.addConnector(StandardService.java:234) ~[tomcat-embed-core-9.0.55.jar!/:na] ... 26 common frames omitted Caused by: java.net.BindException: 地址已在使用 at sun.nio.ch.Net.bind0(Native Method) ~[na:1.8.0_171] at sun.nio.ch.Net.bind(Net.java:433) ~[na:1.8.0_171] at sun.nio.ch.Net.bind(Net.java:425) ~[na:1.8.0_171] at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:223) ~[na:1.8.0_171] at org.apache.tomcat.util.net.NioEndpoint.initServerSocket(NioEndpoint.java:271) ~[tomcat-embed-core-9.0.55.jar!/:na] at org.apache.tomcat.util.net.NioEndpoint.bind(NioEndpoint.java:226) ~[tomcat-embed-core-9.0.55.jar!/:na] at org.apache.tomcat.util.net.AbstractEndpoint.bindWithCleanup(AbstractEndpoint.java:1213) ~[tomcat-embed-core-9.0.55.jar!/:na] at org.apache.tomcat.util.net.AbstractEndpoint.start(AbstractEndpoint.java:1299) ~[tomcat-embed-core-9.0.55.jar!/:na] at org.apache.coyote.AbstractProtocol.start(AbstractProtocol.java:614) ~[tomcat-embed-core-9.0.55.jar!/:na] at org.apache.catalina.connector.Connector.startInternal(Connector.java:1072) ~[tomcat-embed-core-9.0.55.jar!/:na] ... 28 common frames omitted

The reason for Linux tomcat port occupancy is to close all the tomcats that are enabled in Linux.