Unexpected exception when attempting to tear down the Mojarra runtime

Pessoal,

Estou tentando iniciar meu tomcat 7 no eclipse indigo, e tem um projeto associado a ele, e esta dando o erro abaixo :

GRAVE: Unexpected exception when attempting to tear down the Mojarra runtime
java.lang.IllegalStateException: O aplicativo não foi iniciado corretamente na inicialização. Não foi possível encontrar Fábrica: javax.faces.application.ApplicationFactory
at javax.faces.FactoryFinder$FactoryManager.getFactory(FactoryFinder.java:951)
at javax.faces.FactoryFinder.getFactory(FactoryFinder.java:316)
at com.sun.faces.config.InitFacesContext.getApplication(InitFacesContext.java:112)
at com.sun.faces.config.ConfigureListener.contextDestroyed(ConfigureListener.java:325)
at org.apache.catalina.core.StandardContext.listenerStop(StandardContext.java:4741)
at org.apache.catalina.core.StandardContext$4.run(StandardContext.java:5450)
at java.lang.Thread.run(Unknown Source)
at org.apache.catalina.core.StandardContext.stopInternal(StandardContext.java:5459)
at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:225)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:153)
at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1033)
at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:774)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145)
at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1033)
at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:291)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145)
at org.apache.catalina.core.StandardService.startInternal(StandardService.java:443)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145)
at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:727)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145)
at org.apache.catalina.startup.Catalina.start(Catalina.java:620)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:303)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:431)

alguem pode me ajudar ??