In our application ,we are using JSF2 with weblogin10.3.4,
The weblogic10.3.4 comes with JSF 2.0 ..We deployed JSF2.0 as library in weblogic.
But when we deploy
Adding the below in web-inf/weblogic.xml solves the issue
10.3.4 / jsf 2.0 1.0.0.0_2-0-2 true