Accessing Stateful session bean from servlet/jsp throws ClassCast exception in jboss 4.2.2

Question

Whenever I try to access EJB 3 Stateful session bean deployed on JBoss 4.2.2 application server using a web client(within JBoss server) such as servlet/jsp , I get following exception java.lang.ClassCastException: $Proxy123 If I use application client , same code works without any exception. Or if I change bean to @Stateless , even web client works fine. If I deploy my .war on the tomcat container externally, again web client works fine for stateful bean also.

So in short : Stateful bean EJB 3 deployed on JBoss 4.2 and accessed via web client deployed on JBoss throws classcastexception

This is my code - client side, written in a servlet

Properties properties = new Properties(); properties.put(Context.INITIAL_CONTEXT_FACTORY, "org.jnp.interfaces.NamingContextFactory"); properties.put(Context.PROVIDER_URL, "jnp://localhost:1099");

        Context c = new InitialContext(properties);
        InvokePOJORemote ref = (InvokePOJORemote) c.lookup("InvokePOJOBean/remote");
        out.println("<h1>Servlet ejb ref " + ref + "</h1>");
        boolean sts = ref.addEmployee("Mad", (short) 30, new java.math.BigDecimal(12000));

This throws ClasscastException at the lookup statement , at time of casting. Dont know what is wrong! Pls help.

Answer 1

My Dear Madhura,

This is a bit disgusting but you need to keep the stateful ejb interface outside the war file.That is neither in the classes folder(of WEB-INF) as .class file nor in the lib folder(of WEB-INF) as .jar file.

Instead wht u can do is create a jar file of the stateful ejb interface and for servlet compilation add the jar to ur project.. say using "add external jars" in Eclipse.

That should work..

God bless you.

The Devil Himself.