I am getting a ClassCastException when using the CMP 2.x jdbc2 PM for one of my entity beans in JBoss.

Solution Verified - Updated -


  • We tried to define this bean as a "Standard Pessimistic CMP 2.x EntityBean" but then we get ClassCastExceptions while deploying because it then uses a JDBCStoreManager which is incompatible to the JDBCStoreManager2 of the new persistence manager.

  • You see the following exception in your server.log:

    12:04:02,089 WARN  [ServiceController] Problem starting service jboss.j2ee:service=EjbModule,module=xxxxx-2.8.1.jar
     org.jboss.ejb.plugins.cmp.jdbc2.JDBCStoreManager2 cannot be cast to 
            at org.jboss.ejb.plugins.cmp.jdbc.JDBCStoreManager.start(JDBCStoreManager.java:386)
            at org.jboss.ejb.plugins.CMPPersistenceManager.start(CMPPersistenceManager.java:172)
            at org.jboss.ejb.EjbModule.startService(EjbModule.java:414)
            at org.jboss.system.ServiceMBeanSupport.jbossInternalStart(ServiceMBeanSupport.java:289)


  • JBoss Enterprise Application Platform (EAP)
    • 5.x
    • 4.x
  • Enterprise Java Bean (EJB) 2.1 Container Managed Persistence (CMP) Entity Beans
  • Enterprise Java Bean (EJB) 2.1 Bean-Managed Persistence (BMP) Entity Beans

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