tomcat 9 启动服务器之后拒绝访问 -- 8005 port -- tomcat may be not running

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• 在网上搜了很多方法，修改java.security文件中的securerandom.source=file:/dev/random 改为 securerandom.source=file:/dev/urandom；修改server.xml中的8005 改为8006；或者等待一段时间，等等…

• 但是很遗憾,这对我的tomcat没有用

• 于是我去看tomcat的日志文件apache-tomcat-9.0.24/logs/catalina.out,在里面看到了

• 17-Sep-2019 14:40:51.157 严重 [main] org.apache.catalina.core.ContainerBase.startInternal 子容器启动失败 java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/williamdsy]] at java.base/java.util.concurrent.FutureTask.report(FutureTask.java:122) at java.base/java.util.concurrent.FutureTask.get(FutureTask.java:191) at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:916) at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:841) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1384) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1374) at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264) at org.apache.tomcat.util.threads.InlineExecutorService.execute(InlineExecutorService.java:75) at java.base/java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:140) at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:909) at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:262) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) at org.apache.catalina.core.StandardService.startInternal(StandardService.java:421) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:932) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) at org.apache.catalina.startup.Catalina.start(Catalina.java:633) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:567) at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:344) at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:475) Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/williamdsy]] at org.apache.catalina.util.LifecycleBase.handleSubClassException(LifecycleBase.java:440) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:198) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1384) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1374) at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264) at org.apache.tomcat.util.threads.InlineExecutorService.execute(InlineExecutorService.java:75) at java.base/java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:140) at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:909) ... 21 more Caused by: java.lang.IllegalArgumentException: Invalid <url-pattern> [jsp/RegisterServlet] in servlet mapping at org.apache.catalina.core.StandardContext.addServletMappingDecoded(StandardContext.java:3178) at org.apache.catalina.Context.addServletMappingDecoded(Context.java:881) at org.apache.catalina.startup.ContextConfig.configureContext(ContextConfig.java:1392) at org.apache.catalina.startup.ContextConfig.webConfig(ContextConfig.java:1175) at org.apache.catalina.startup.ContextConfig.configureStart(ContextConfig.java:775) at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:301) at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:123) at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5051) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) ... 27 more

• 可以看到关键词: 子容器启动失败 , Invalid [jsp/RegisterServlet] in servlet mapping , StandardContext[/williamdsy]] …

• 由此推断,是因为我之前在子容器中的WEB-INF/web.xml文件中添加了servlet 和 servlet-mapping

• 将它们删除之后, 就可以正常访问了

• 希望能对你有所帮助