ContainerBase.addChild:start:問題の原因と解決方法

今日は以下の異常を見て、昨日はまだよくて、今日はどうしてだめなのか、少し悩んで、ヒントをよく見て、問題が発生した原因を見つけました.

  : ContainerBase.addChild: start: 
org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/Product]]
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
	at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:901)
	at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877)
	at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:632)
	at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1229)
	at org.apache.catalina.startup.HostConfig$DeployDirectory.run(HostConfig.java:1875)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
	at java.util.concurrent.FutureTask.run(FutureTask.java:262)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:744)
Caused by: java.lang.IllegalArgumentException: Invalid  myAcount in servlet mapping
	at org.apache.catalina.core.StandardContext.addServletMapping(StandardContext.java:3279)
	at org.apache.catalina.core.StandardContext.addServletMapping(StandardContext.java:3254)
	at org.apache.catalina.deploy.WebXml.configureContext(WebXml.java:1361)
	at org.apache.catalina.startup.ContextConfig.webConfig(ContextConfig.java:1341)
	at org.apache.catalina.startup.ContextConfig.configureStart(ContextConfig.java:873)
	at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:371)
	at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117)
	at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:90)
	at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5355)
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
	... 10 more
   17, 2018 7:55:43    org.apache.catalina.startup.HostConfig deployDirectory
  : Error deploying web application directory H:\apache-tomcat-7.0.52-windows-x64\apache-tomcat-7.0.52\webapps\Product
java.lang.IllegalStateException: ContainerBase.addChild: start: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/Product]]
	at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:904)
	at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877)
	at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:632)
	at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1229)
	at org.apache.catalina.startup.HostConfig$DeployDirectory.run(HostConfig.java:1875)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
	at java.util.concurrent.FutureTask.run(FutureTask.java:262)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:744)

見えるのは

Caused by: java.lang.IllegalArgumentException: Invalid  myAcount in servlet mapping
	at org.apache.catalina.core.StandardContext.addServletMapping(StandardContext.java:3279)
	at org.apache.catalina.core.StandardContext.addServletMapping(StandardContext.java:3254)
	at org.apache.catalina.deploy.WebXml.configureContext(WebXml.java:1361)

myAccoutは私が新しく作ったサーブレットのmappingで、それからすぐに何でも分かりました.mappingを書くときに前に「/」をつけるのを忘れたのです.ええ...この間違いは少し低級で、みんなに問題を解決するのに少し助けを提供することを望んで、これらの小さな間違いに悩まされないでください!にこにこ