I am attempting to use RichFaces 4.0 ALPHA 2 in a JSF 2.0 project in NetBeans. I added the jars listed in the readme.txt file in the distribution, cssparser-0.9.5, and sac-1.3. When I deploy the application on Tomcat 6.0.26 I received the following exception:
SEVERE: Servlet.service() for servlet Faces Servlet threw exception
Yes, this was a bug in configuring cache factories in A2 - so thank you for reporting the problem! RF M1 should be ok with that and use fallback cache implementation if nothing from the recommended caches is available.