JSF - executePhase(RENDER_RESPONSE 6,com.sun.faces.context.FacesContextImpl@1ae6456) threw exception

http://www.coderanch.com/t/414767/JSF/java/Faces-Exception-Hello-world-ish

There is either a bug in the old JSF implementation or you configured the stuff the wrong way. First upgrade your JSF implementation to the latest available at their homepage (currently 1.2_10) and see if it solves the problem. If it doesn't, then please paste the new stacktrace here along with your faces-config.xml.

1.2 이전 버전에서 발견된 bug다.. 

2.0을 사용하면 될 것 같다.

https://javaserverfaces.dev.java.net/download.html