SEVERE: A child container failed during start报错

绝地灬酷狼 2022-05-10 13:18 140阅读 0赞

## 一、现象： ##

启动tomcat

![70][]

错误代码

//忽略N条代码
    SEVERE: A child container failed during start
    java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/2016]]
    	at java.util.concurrent.FutureTask$Sync.innerGet(FutureTask.java:252)
    	at java.util.concurrent.FutureTask.get(FutureTask.java:111)
    	at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1123)
    	at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:816)
    	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1575)
    	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1565)
    	at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
    	at java.util.concurrent.FutureTask.run(FutureTask.java:166)
    	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
    	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
    	at java.lang.Thread.run(Thread.java:722)
    Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/s2016]]
    	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
    	... 7 more
    Caused by: java.lang.NoClassDefFoundError: HttpSessionBindingEvent
    	at java.lang.Class.getDeclaredMethods0(Native Method)
    	at java.lang.Class.privateGetDeclaredMethods(Class.java:2442)
    	at java.lang.Class.getDeclaredMethods(Class.java:1808)
    	at org.apache.catalina.util.Introspection.getDeclaredMethods(Introspection.java:127)
    	at org.apache.catalina.startup.WebAnnotationSet.loadMethodsAnnotation(WebAnnotationSet.java:287)
    	at org.apache.catalina.startup.WebAnnotationSet.loadApplicationListenerAnnotations(WebAnnotationSet.java:90)
    	at org.apache.catalina.startup.WebAnnotationSet.loadApplicationAnnotations(WebAnnotationSet.java:63)
    	at org.apache.catalina.startup.ContextConfig.applicationAnnotationsConfig(ContextConfig.java:415)
    	at org.apache.catalina.startup.ContextConfig.configureStart(ContextConfig.java:892)
    	at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:386)
    	at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117)
    	at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:90)
    	at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5380)
    	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    	... 7 more
    Caused by: java.lang.ClassNotFoundException: HttpSessionBindingEvent
    	at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1720)
    	at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1571)
    	... 21 more
    
    //忽略N条代码

## 二、有关很多网上说的报错 ##

1.     web.xml下，将过滤规则定为“\*”就是一种错误，需要更正为“/\*”或者其他（但是必须要有“/”开头，表示当前项目）

2.    **[A child container failed during start 从来都不是问题的根本原因！][A child container failed during start]**

## **三、自己出现的错误** ##

现象：![70 1][]![70 2][]

各种文件都出现报错

解决方法：原因是因为项目没有导入servlet.jar包

右键工程→build path→添加servlet.jar包

![70 3][]

前↑       后↓

![70 4][]

# 解决 #

[70]: /images/20220505/04b305bf1e904e41ae3f02a1ed083fb6.png
[A child container failed during start]: https://blog.csdn.net/testcs_dn/article/details/78990211
[70 1]: https://img-blog.csdn.net/20181018141809889?watermark/2/text/aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzE2OTQ2ODAz/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70
[70 2]: /images/20220505/5ea58e6c10694c8ca21090c64ae175aa.png
[70 3]: /images/20220505/2c9d6e3b0521478a95b817eeb359b1e6.png
[70 4]: /images/20220505/875e5a4d3d0a49739cdad85e5a39fd11.png