I'm having trouble following this guide to "extract" my interfaces and entities from my EAR to use them from another Web Application:

• I use NetBeans 6.8 and Glassfish 3.0.1
• "Java Class Library" project
  • contains all the entities and interfaces
• "Java EE Application" project
  • class library added to the project, is packaged into the EAR
  • contains EJB implementations, MDBs, Test
• "Java Web Application" project
  • class library added to the project, is packaged into the WAR
  • contains REST interface

When I build and deploy the Web Application, all goes well.

When I build the JEE application, I can see the jar-file (interfaces, entities) being included. But when I try to deploy the EAR, Glassfish refuses it with a java.lang.NoClassDefFoundError error:

[#|2010-03-28T18:25:59.875+0200|WARNING|glassfishv3.0|javax.enterprise.system.tools.deployment.org.glassfish.deployment.common|_ThreadID=28;_ThreadName=Thread-1;|Error in annotation processing: java.lang.NoClassDefFoundError: mvs/core/StoreServiceLocal|#]

[#|2010-03-28T18:25:59.876+0200|SEVERE|glassfishv3.0|javax.enterprise.system.core.com.sun.enterprise.v3.server|_ThreadID=28;_ThreadName=Thread-1;|Exception while deploying the app
java.lang.IllegalArgumentException: Invalid ejb jar [CoreServer]: 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, @Singleton), please check server.log to see whether the annotations were processed properly.

'mvs/core/StoreServiceLocal' is an interface which is defined in the library jar file.

What am I doing wrong?