tomcat启动失败

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#tomcat

在尝试启动Tomcat时遇到了一个严重问题：org.apache.catalina.LifecycleException，具体原因是Invalid `<url-pattern>` [hello] in servlet mapping。这个问题可能导致Tomcat无法正常启动。解决方案包括检查并修正servlet映射配置。

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01-Mar-2019 13:44:32.097 严重 [RMI TCP Connection(5)-127.0.0.1] org.apache.catalina.core.ContainerBase.addChildInternal ContainerBase.addChild: start:
org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/sqh]]
   at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:167)
   at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:752)
   at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:728)
   at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:734)
   at org.apache.catalina.startup.HostConfig.manageApp(HostConfig.java:1739)
   at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
   at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
   at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
   at java.lang.reflect.Method.invoke(Method.java:498)
   at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:300)
   at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:819)
   at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:801)
   at org.apache.catalina.mbeans.MBeanFactory.createStandardContext(MBeanFactory.java:482)
   at org.apache.catalina.mbeans.MBeanFactory.createStandardContext(MBeanFactory.java:431)
   at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
   at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
   at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
   at java.lang.reflect.Method.invoke(Method.java:498)
   at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:300)
   at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:819)
   at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:801)
   at javax.management.remote.rmi.RMIConnectionImpl.doOperation(RMIConnectionImpl.java:1468)
   at javax.management.remote.rmi.RMIConnectionImpl.access$300(RMIConnectionImpl.java:76)
   at javax.management.remote.rmi.RMIConnectionImpl$PrivilegedOperation.run(RMIConnectionImpl.java:1309)
   at javax.management.remote.rmi.RMIConnectionImpl.doPrivilegedOperation(RMIConnectionImpl.java:1401)
   at javax.management.remote.rmi.RMIConnectionImpl.invoke(RMIConnectionImpl.java:829)
   at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
   at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
   at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
   at java.lang.reflect.Method.invoke(Method.java:498)
   at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:357)
   at sun.rmi.transport.Transport$1.run(Transport.java:200)
   at sun.rmi.transport.Transport$1.run(Transport.java:197)
   at java.security.AccessController.doPrivileged(Native Method)
   at sun.rmi.transport.Transport.serviceCall(Transport.java:196)
   at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:573)
   at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:834)
   at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.lambda$run$0(TCPTransport.java:688)
   at java.security.AccessController.doPrivileged(Native Method)
   at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:687)
   at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
   at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
   at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.IllegalArgumentException: Invalid <url-pattern> [hello] in servlet mapping
   at org.apache.catalina.core.StandardContext.addServletMappingDecoded(StandardContext.java:3158)
   at org.apache.catalina.core.StandardContext.addServletMappingDecoded(StandardContext.java:3145)
   at org.apache.catalina.startup.ContextConfig.configureContext(ContextConfig.java:1376)
   at org.apache.catalina.startup.ContextConfig.webConfig(ContextConfig.java:1190)
   at org.apache.catalina.startup.ContextConfig.configureStart(ContextConfig.java:775)
   at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:299)
   at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:94)
   at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5105)
   at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
   ... 42 more

01-Mar-2019 13:44:32.190 严重 [RMI TCP Connection(5)-127.0.0.1] org.apache.tomcat.util.modeler.BaseModelMBean.invoke Exception invoking method manageApp
java.lang.IllegalStateException: ContainerBase.addChild: start: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/sqh]]
   at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:756)
   at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:728)
   at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:734)
   at org.apache.catalina.startup.HostConfig.manageApp(HostConfig.java:1739)
   at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
   at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
   at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
   at java.lang.reflect.Method.invoke(Method.java:498)
   at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:300)
   at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:819)
   at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:801)
   at org.apache.catalina.mbeans.MBeanFactory.createStandardContext(MBeanFactory.java:482)
   at org.apache.catalina.mbeans.MBeanFactory.createStandardContext(MBeanFactory.java:431)
   at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
   at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
   at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
   at java.lang.reflect.Method.invoke(Method.java:498)
   at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:300)
   at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:819)
   at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:801)
   at javax.management.remote.rmi.RMIConnectionImpl.doOperation(RMIConnectionImpl.java:1468)
   at javax.management.remote.rmi.RMIConnectionImpl.access$300(RMIConnectionImpl.java:76)
   at javax.management.remote.rmi.RMIConnectionImpl$PrivilegedOperation.run(RMIConnectionImpl.java:1309)
   at javax.management.remote.rmi.RMIConnectionImpl.doPrivilegedOperation(RMIConnectionImpl.java:1401)
   at javax.management.remote.rmi.RMIConnectionImpl.invoke(RMIConnectionImpl.java:829)
   at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
   at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
   at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
   at java.lang.reflect.Method.invoke(Method.java:498)
   at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:357)
   at sun.rmi.transport.Transport$1.run(Transport.java:200)
   at sun.rmi.transport.Transport$1.run(Transport.java:197)
   at java.security.AccessController.doPrivileged(Native Method)
   at sun.rmi.transport.Transport.serviceCall(Transport.java:196)
   at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:573)
   at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:834)
   at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.lambda$run$0(TCPTransport.java:688)
   at java.security.AccessController.doPrivileged(Native Method)
   at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:687)
   at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
   at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
   at java.lang.Thread.run(Thread.java:748)

01-Mar-2019 13:44:32.207 严重 [RMI TCP Connection(5)-127.0.0.1] org.apache.tomcat.util.modeler.BaseModelMBean.invoke Exception invoking method createStandardContext

我的错误是

  <servlet-mapping>
    <servlet-name>sqh</servlet-name>
    <url-pattern>hello</url-pattern>//这里差了一个/
  </servlet-mapping>
</web-app>

正确的是

  <servlet-mapping>
    <servlet-name>sqh</servlet-name>
    <url-pattern>/hello</url-pattern>
  </servlet-mapping>
</web-app>

我的错误是这个，还有许多可以导致tomcat启动失败，如jar缺失，若你的错误不是这种你可以试一下更改jar包