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java.lang.IllegalStateException: 启动子级时出错

武飞扬头像
衣冠禽兽_
帮助3人

本章是存放我遇到该异常子类的文章，但凡是涉及此异常都会放在里面，
所以会多次更新，如果有遇到其他困难可以告诉我，我可能碰到过

有帮助就帮忙给个赞或者关注吧！！！！！【鞠躬】

1、情况一：@WebServlet 的配置问题

1.1、错误警告查看

			你可以页面搜索一些关键字，看下有没有相同的异常提示/警告

18-Jan-2022 08:57:20.774 严重 [RMI TCP Connection(5)-127.0.0.1] org.apache.tomcat.util.modeler.BaseModelMBean.invoke 调用方法[manageApp]时发生异常
	java.lang.IllegalStateException: 启动子级时出错
		at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:729)
		at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:698)
		at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:747)
		at org.apache.catalina.startup.HostConfig.manageApp(HostConfig.java:1822)
		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:566)
		at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:293)
		at java.management/com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:809)
		at java.management/com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:801)
		at org.apache.catalina.mbeans.MBeanFactory.createStandardContext(MBeanFactory.java:428)
		at org.apache.catalina.mbeans.MBeanFactory.createStandardContext(MBeanFactory.java:376)
		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:566)
		at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:293)
		at java.management/com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:809)
		at java.management/com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:801)
		at java.management/com.sun.jmx.remote.security.MBeanServerAccessController.invoke(MBeanServerAccessController.java:468)
		at java.management.rmi/javax.management.remote.rmi.RMIConnectionImpl.doOperation(RMIConnectionImpl.java:1466)
		at java.management.rmi/javax.management.remote.rmi.RMIConnectionImpl$PrivilegedOperation.run(RMIConnectionImpl.java:1307)
		at java.base/java.security.AccessController.doPrivileged(Native Method)
		at java.management.rmi/javax.management.remote.rmi.RMIConnectionImpl.doPrivilegedOperation(RMIConnectionImpl.java:1406)
		at java.management.rmi/javax.management.remote.rmi.RMIConnectionImpl.invoke(RMIConnectionImpl.java:827)
		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:566)
		at java.rmi/sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:359)
		at java.rmi/sun.rmi.transport.Transport$1.run(Transport.java:200)
		at java.rmi/sun.rmi.transport.Transport$1.run(Transport.java:197)
		at java.base/java.security.AccessController.doPrivileged(Native Method)
		at java.rmi/sun.rmi.transport.Transport.serviceCall(Transport.java:196)
		at java.rmi/sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:562)
		at java.rmi/sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:796)
		at java.rmi/sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.lambda$run$0(TCPTransport.java:677)
		at java.base/java.security.AccessController.doPrivileged(Native Method)
		at java.rmi/sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:676)
		at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
		at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
		at java.base/java.lang.Thread.run(Thread.java:834)
	Caused by: org.apache.catalina.LifecycleException: 无法启动组件[StandardEngine[Catalina].StandardHost[localhost].StandardContext[/my]]
		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.addChildInternal(ContainerBase.java:726)
		... 42 more
	Caused by: java.lang.IllegalArgumentException: servlet映射中的<url pattern>[mytest1]无效
		at org.apache.catalina.core.StandardContext.addServletMappingDecoded(StandardContext.java:3261)
		at org.apache.catalina.Context.addServletMappingDecoded(Context.java:905)
		at org.apache.catalina.startup.ContextConfig.configureContext(ContextConfig.java:1562)
		at org.apache.catalina.startup.ContextConfig.webConfig(ContextConfig.java:1329)
		at org.apache.catalina.startup.ContextConfig.configureStart(ContextConfig.java:986)
		at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:303)
		at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:123)
		at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5068)
		at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
		... 43 more
18-Jan-2022 08:57:20.778 严重 [RMI TCP Connection(5)-127.0.0.1] org.apache.tomcat.util.modeler.BaseModelMBean.invoke 调用方法[createStandardContext]时发生异常
	javax.management.RuntimeOperationsException: 调用方法[manageApp]时发生异常
		at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:303)
		at java.management/com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:809)
		at java.management/com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:801)
		at org.apache.catalina.mbeans.MBeanFactory.createStandardContext(MBeanFactory.java:428)
		at org.apache.catalina.mbeans.MBeanFactory.createStandardContext(MBeanFactory.java:376)
		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:566)
		at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:293)
		at java.management/com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:809)
		at java.management/com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:801)
		at java.management/com.sun.jmx.remote.security.MBeanServerAccessController.invoke(MBeanServerAccessController.java:468)
		at java.management.rmi/javax.management.remote.rmi.RMIConnectionImpl.doOperation(RMIConnectionImpl.java:1466)
		at java.management.rmi/javax.management.remote.rmi.RMIConnectionImpl$PrivilegedOperation.run(RMIConnectionImpl.java:1307)
		at java.base/java.security.AccessController.doPrivileged(Native Method)
		at java.management.rmi/javax.management.remote.rmi.RMIConnectionImpl.doPrivilegedOperation(RMIConnectionImpl.java:1406)
		at java.management.rmi/javax.management.remote.rmi.RMIConnectionImpl.invoke(RMIConnectionImpl.java:827)
		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:566)
		at java.rmi/sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:359)
		at java.rmi/sun.rmi.transport.Transport$1.run(Transport.java:200)
		at java.rmi/sun.rmi.transport.Transport$1.run(Transport.java:197)
		at java.base/java.security.AccessController.doPrivileged(Native Method)
		at java.rmi/sun.rmi.transport.Transport.serviceCall(Transport.java:196)
		at java.rmi/sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:562)
		at java.rmi/sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:796)
		at java.rmi/sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.lambda$run$0(TCPTransport.java:677)
		at java.base/java.security.AccessController.doPrivileged(Native Method)
		at java.rmi/sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:676)
		at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
		at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
		at java.base/java.lang.Thread.run(Thread.java:834)
	Caused by: java.lang.IllegalStateException: 启动子级时出错
		at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:729)
		at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:698)
		at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:747)
		at org.apache.catalina.startup.HostConfig.manageApp(HostConfig.java:1822)
		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:566)
		at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:293)
		... 34 more
	Caused by: org.apache.catalina.LifecycleException: 无法启动组件[StandardEngine[Catalina].StandardHost[localhost].StandardContext[/my]]
		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.addChildInternal(ContainerBase.java:726)
		... 42 more
	Caused by: java.lang.IllegalArgumentException: servlet映射中的<url pattern>[mytest1]无效
		at org.apache.catalina.core.StandardContext.addServletMappingDecoded(StandardContext.java:3261)
		at org.apache.catalina.Context.addServletMappingDecoded(Context.java:905)
		at org.apache.catalina.startup.ContextConfig.configureContext(ContextConfig.java:1562)
		at org.apache.catalina.startup.ContextConfig.webConfig(ContextConfig.java:1329)
		at org.apache.catalina.startup.ContextConfig.configureStart(ContextConfig.java:986)
		at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:303)
		at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:123)
		at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5068)
		at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
		... 43 more
[2022-01-18 08:57:20,800] 工件 untitled1:war exploded: 部署工件时出错。请参阅服务器日志了解详细信息。
18-Jan-2022 08:57:30.198 信息 [Catalina-utility-1] org.apache.catalina.startup.HostConfig.deployDirectory 把web 应用程序部署到目录 [D:\softwore\Tomcat\apache-tomcat-10.1.0-M8\webapps\manager]
18-Jan-2022 08:57:30.614 警告 [Catalina-utility-1] org.apache.catalina.util.SessionIdGeneratorBase.createSecureRandom 使用[SHA1PRNG]创建会话ID生成的SecureRandom实例花费了[310]毫秒。
18-Jan-2022 08:57:30.650 信息 [Catalina-utility-1] org.apache.catalina.startup.HostConfig.deployDirectory Web应用程序目录[D:\softwore\Tomcat\apache-tomcat-10.1.0-M8\webapps\manager]的部署已在[453]毫秒内完成
学新通

1.2、详解：

前提：

		这一天我在测试刚学的东西，昨天服务器运行正常，今天刚刚写点测试就报错
		因为不知道是不是昨天试图让别人访问我的服务器，修改了servlet.xml(**我用的是Tomcat**)
		所以我第一时间去看了对应文档

行动：

		servlet.xml 发现无误，所以只能查看错误警告：从上到下粗略查看
		发现关键字**<url pattern>[mytest1]**无效，应该是映射出现了问题
		（前面有提示服务器正常启动，但后面部署工程出现错误）

原因：

		写映射的时候遗漏了   “ **/** ” ，如图：

		有绿色波浪线，但是没有飘红，而且也只是提示拼写错误，更换一个字符串而已，所以我没有多想

更改前：

学新通

更改后：仍然提示：

学新通

2、情况二：XML映射问题

		异常情况和情况一相同，只是地点换了，错误相同，不过多赘述

		在写XML映射标签的时候，也是漏了   ” / “ 

		hello  ->   /hello

正确形式：

    <servlet-mapping>
        <servlet-name>Mymap</servlet-name>
        <url-pattern>/hello</url-pattern>
    </servlet-mapping>

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