之前好好的，现在突然冒出一个这个错误

java.lang.AbstractMethodError

at org.apache.catalina.core.StandardContext.listenerStop(StandardContext.java:4817)

at org.apache.catalina.core.StandardContext.stopInternal(StandardContext.java:5474)

at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:226)

at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)

at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:754)

at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:730)

at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:734)

at org.apache.catalina.startup.HostConfig.manageApp(HostConfig.java:1731)

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:287)

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:483)

at org.apache.catalina.mbeans.MBeanFactory.createStandardContext(MBeanFactory.java:432)

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:287)

at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:819)

at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:801)

at com.sun.jmx.remote.security.MBeanServerAccessController.invoke(MBeanServerAccessController.java:468)

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 java.security.AccessController.doPrivileged(Native Method)

at javax.management.remote.rmi.RMIConnectionImpl.doPrivilegedOperation(RMIConnectionImpl.java:1408)

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)

同学你好，建议同学查看控制台后边两个窗口是否有报错，如:

如果有报错，请将报错信息具体贴一下。

祝：学习愉快~