com.sun.enterprise.deployment.backend.IASDeploymentException: Error loading deployment descriptors for module [Oper8EA] -- Invalid ejb jar [appserv-rt.jar]: it contains zero ejb. Note: 1. A valid ejb jar requires at least one session, entity (1.x/2.x style), or message driven bean. 2. EJB3+ entity beans (@Entity) are POJOs and please package them as library jar. 3. If the jar file contains valid EJBs which are annotated with EJB component level annotations (@Stateless, @Stateful, @MessageDriven), please check server.log to see whether the annotations were processed properly.