javax.faces.view.facelets.FaceletCacheFactory 求大神们帮帮忙

[zhongpaihaui]

严重: An error occured while initializing MyFaces: javax.faces.view.facelets.FaceletCacheFactory
java.lang.IllegalArgumentException: javax.faces.view.facelets.FaceletCacheFactory
at javax.faces.FactoryFinder.validateFactoryName(FactoryFinder.java:653)
at javax.faces.FactoryFinder.setFactory(FactoryFinder.java:327)
at org.apache.myfaces.config.FacesConfigurator.setFactories(FacesConfigurator.java:498)
at org.apache.myfaces.config.FacesConfigurator.configureFactories(FacesConfigurator.java:492)
at org.apache.myfaces.config.FacesConfigurator.configure(FacesConfigurator.java:418)
at org.apache.myfaces.webapp.AbstractFacesInitializer.buildConfiguration(AbstractFacesInitializer.java:370)
at org.apache.myfaces.webapp.Jsp21FacesInitializer.initContainerIntegration(Jsp21FacesInitializer.java:73)
at org.apache.myfaces.webapp.AbstractFacesInitializer.initFaces(AbstractFacesInitializer.java:143)
at org.apache.myfaces.webapp.StartupServletContextListener.contextInitialized(StartupServletContextListener.java:119)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4210)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4709)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:802)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:779)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:583)
at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1080)
at org.apache.catalina.startup.HostConfig.deployDirectories(HostConfig.java:1003)
at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:507)
at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1322)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:325)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:142)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1068)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:822)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1060)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:463)
at org.apache.catalina.core.StandardService.start(StandardService.java:525)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:759)
at org.apache.catalina.startup.Catalina.start(Catalina.java:595)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)



这个到底是为什么，怎么解决呀？？？ 跪求