linkage error : RuntimeDelegate.class

Hi

I have been seeing linkage errors when deploying CXF Jaxrs webapp on WebLogic 12c. I read the migration to 3.x guideline but don't find any clues on it.

The following is the error:

-101216> <Servlet: "Jersey" failed to preload on startup in Web application: "enterprise-caching.war".
java.lang.LinkageError: ClassCastException: attempting to castzip:/home/swnepali/Oracle/Middleware/Oracle_Home/user_projects/domains/base_domain/servers/AdminServer/tmp/_WL_user/enterprise-caching/y2gltg/war/WEB-INF/lib/javax.ws.rs-api-2.0.jar!/javax/ws/rs/ext/RuntimeDelegate.classtojar:file:/home/swnepali/Oracle/Middleware/Oracle_Home/oracle_common/modules/jersey-core-1.17.1.jar!/javax/ws/rs/ext/RuntimeDelegate.class

thanks
-Sonam