JBoss, myfaces and tomahawk extensions

Jboss uses Apache myfaces as JSF implementation. The api and impl packages are included in jbossweb-tomcatXX/jsf-libs. Unfortunately when trying to deploy a webapp that uses the tomahawk extensions you run into classloading problems (java.lang.ClassCastException) because the impl package as well as the tomahwak.jar contain both shared classes. To solve these problems make sure that all jars are loaded by the same classloader (i.e. copy tomahawk.jar to jbossweb-tomcatXX/jsf-libs or remove jsf-libs and add myfaces-api.jar, myfaces-impl.jar and tomahawk.jar to your WEB-INF/libs). With the former solution, however, you're not able to access any resources from your webapp. Therefore it is best if you remove the jsf-libs and include all required libs in the webapp.