How to force WebSphere AS 8 to use a specific JSF implementation?

Question

I have an old enterprise application that was developed using WAS 6.1, now my company is trying to perform the implementation of that application in WAS 8. But I am having t

Answer 1

Make sure that you are using PARENT_LAST classloading.

Otherwise it will load its own JSF 2.0 libs first and your class doesn't match the interface. You should check though if you could update to MyFaces 2.0.