Asynchronous invocations on EJB3 beans as explained here http://docs.jboss.org/ejb3/app-server/reference/build/reference/en/html/j..., at present, does not work in JBoss-5. [java] Exception in thread "main" java.lang.ClassCastException: $Proxy2 | [java] at org.jboss.ejb3.asynchronous.Asynch.getAsynchronousProxy(Asynch.java:38) | [java] at org.jboss.tutorial.asynch.client.Client.main(Client.java:40) | [java] Java Result: 1 | The ClassCastException arises from this line in org.jboss.ejb3.asynchronous.Asynch.getAsynchronousProxy: JBossProxy proxy = (JBossProxy)ejbRef; The proxies that we create in EJB3 on JBoss-5.0, no longer implement this JBossProxy interface and hence this exception. The JNDI tree output of the bean: | +- SomeJNDIName (class: Proxy for: org.jboss.ejb3.core.asynch.test.SimpleSLSBRemote) The same beans when deployed on JBoss-4.2.x do implement this interface: +- SimpleSLSB (class: org.jnp.interfaces.NamingContext) | | +- remote (proxy: $Proxy70 implements interface org.jboss.ejb3.core.asynch.test.SimpleSLSBRemote,interface org.jboss.ejb3.JBossProxy) | Any specific reason why we no longer add this as a default interface for the proxies? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4198459#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...