8 Replies Latest reply on Nov 25, 2009 5:44 PM by Pedro Garcia Medina

    ClassCastException in remote EJB3.0 lookup from tomcat webap

    Michael Eibeck Newbie

      Hi everyone,

      I am trying to connect to an EJB3.0 remote session bean (deployed in an ear on JBoss V4.0.5) from a tomcat V5.5 webapp. The tomcat and the JBoss installation are deployed on different machines.

      I get the following ClassCastException in a call to PortableRemoteObject.narrow:

      java.lang.ClassCastException
      at com.sun.corba.se.impl.javax.rmi.PortableRemoteObject.narrow(PortableRemoteObject.java:229)

      Caused by: java.lang.ClassCastException: javax.naming.Reference
      at com.sun.corba.se.impl.javax.rmi.PortableRemoteObject.narrow(PortableRemoteObject.java:212)

      Here is my client code:

      String urlName = "jnp://156.135.155.156:1099";
      Properties p = new Properties();
      p.put(Context.INITIAL_CONTEXT_FACTORY,"org.jnp.interfaces.NamingContextFactory");
      p.put(Context.PROVIDER_URL, urlName);
      p.put(Context.URL_PKG_PREFIXES, "org.jboss.naming:org.jnp.interfaces");

      InitialContext ic = new InitialContext(p);

      Object ref = ic.lookup("SDOCIBusinessApp/SDOCIBusinessServiceImpl/remote");

      SDOCIBusinessService narrowed = (SDOCIBusinessService )PortableRemoteObject.narrow(ref, SDOCIBusinessService.class);

      Here is the list output of jmx-console:

      Global JNDI Namespace
      +- HASessionState (class: org.jnp.interfaces.NamingContext)
      | +- Default (class: org.jboss.ha.hasessionstate.server.HASessionStateImpl)
      +- TopicConnectionFactory (class: org.jboss.naming.LinkRefPair)
      +- jmx (class: org.jnp.interfaces.NamingContext)
      | +- invoker (class: org.jnp.interfaces.NamingContext)
      | | +- RMIAdaptor (proxy: $Proxy52 implements interface org.jboss.jmx.adaptor.rmi.RMIAdaptor,interface org.jboss.jmx.adaptor.rmi.RMIAdaptorExt)
      | +- rmi (class: org.jnp.interfaces.NamingContext)
      | | +- RMIAdaptor[link -> jmx/invoker/RMIAdaptor] (class: javax.naming.LinkRef)
      +- SDOCIBusinessApp (class: org.jnp.interfaces.NamingContext)
      | +- SDOCIBusinessServiceImpl (class: org.jnp.interfaces.NamingContext)
      | | +- remote (class: java.lang.Object)
      | | +- remoteStatefulProxyFactory (proxy: $Proxy87 implements interface org.jboss.ejb3.ProxyFactory)
      | +- ExcelConverterImpl (class: org.jnp.interfaces.NamingContext)
      | | +- local (proxy: $Proxy79 implements No ClassLoaders found for: ch.skyguide.aim.interfaces.businesslogic.converter.ExcelConverter (no security manager: RMI class loader disabled))
      | +- IBriefingExportInvokerImpl (class: org.jnp.interfaces.NamingContext)
      | | +- local (proxy: $Proxy82 implements No ClassLoaders found for: ch.skyguide.aim.interfaces.businesslogic.exportinvoker.IBriefingExportInvoker (no security manager: RMI class loader disabled))


      I have packaged the EJB plus interfaces in an SDOCIBusinessApp.ear to be deployed on jboss and also as a jar in the WEB-INF/lib directory in the war file of my webapp since the webapp needs to reference the interface SDOCIBusinessService.

      I have read all sorts of posted topics which seem to deal with this ClassCastException but I haven't found the solution to my problem yet.

      Can anybody help?