I'm trying to deploy an ear-file with mixed content of EJB2.1 and EJB3 SessionBeans onto JBoss 4.0.4 with the ejb3-option. Deploy fails for the EJB2.1-bean with essentially: ----- at org.jboss.deployment.scanner.AbstractDeploymentScanner$ScannerThread.run(AbstractDeploymentScanner.java:225) Caused by: java.lang.RuntimeException: @javax.ejb.PostActivate annotated method has the wrong signature - public void legacy.LegacyEjbHelloBean.ejbActivate() throws javax.ejb.EJBException,java.rmi.RemoteException at org.jboss.ejb3.interceptor.InterceptorInfoRepository$ContainerInitialiser.resolveLifecycleMethod(InterceptorInfoRepository.java:753) ----- It actually started to fail for the PreDestroy annotation and the ejbRemove()-method but after adding this to the bean class: @javax.annotation.PreDestroy public void dummy() {} it moved on to PostActivate - where it stays even after removing the dummy()-method and annotation, re-deploying and re-starting the server - indicating that something might not be cleaned up properly between deployments. A similar problem seems to be described here: http://www.jboss.com/index.html?module=bb&op=viewtopic&t=93977&am... is it the same? Shouldn't mixed EJB2.1 and EJB3 work? If bug: when can we expect it to work properly? The case: I'm looking into migrating an EJB2.1-app to EJB3 but would like to do it incrementally instead of a big-bang approach. TIA, /hakan View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3986362#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...