ClassCastException while lookingup EJB - Sun ONE App server 7.0


EJB programming & troubleshooting: ClassCastException while lookingup EJB - Sun ONE App server 7.0

  1. Hi all,

    While lookingup EJB from JSP, I am getting the ClassCastException. I am using Sun ONE Application server 7.0 on Win2K machine with JDK1.4. The web module and ejb module are deployed separately as war and jar (not as ear).

    Below is my part of code

    InitialContext context = null;

    context = new InitialContext();

    Object homeObj = context.lookup("java:comp/env/ejb/Gateway");

    GatewayHome gatewayHome = (GatewayHome) javax.rmi.PortableRemoteObject.narrow(homeObj, GatewayHome.class);

    Gateway gateway = gatewayHome.create();

    msg = gateway.process();

    } catch( Exception ex )

    And below is the exception i am getting

    [07/Nov/2002:20:13:41] INFO ( 1784): CORE3282: stdout: hObj =$1
    [07/Nov/2002:20:13:41] INFO ( 1784): CORE3282: stdout: Exception$1
    [07/Nov/2002:20:13:41] WARNING ( 1784): CORE3283: stderr: java.lang.ClassCastException:$1
    [07/Nov/2002:20:13:41] WARNING ( 1784): CORE3283: stderr: at _jasper._MyTest_jsp._jspService(
    [07/Nov/2002:20:13:41] WARNING ( 1784): CORE3283: stderr: at org.apache.jasper.runtime.HttpJspBase.service(
    [07/Nov/2002:20:13:41] WARNING ( 1784): CORE3283: stderr: at javax.servlet.http.HttpServlet.service(
    [07/Nov/2002:20:13:41] WARNING ( 1784): CORE3283: stderr: at com.iplanet.ias.web.jsp.JspServlet$JspServletWrapper.service(

    Can anybody help me.
    Thanks in advance.

  2. It looks since you are running in two separate virtual Machines, may be you need to populate properties and pass to the InitialContext(). The factory and the url.
  3. Hi

    Those modules are not deployed on two different machines / JVM. Those are deployed as independent modules in the same app. servers.
  4. You might be runing Two JVM in the same box. Create 1 EAR file(include the ejb jars and the war files in it).then deploy that ear
  5. Hmmm... RMI/IIOP cannot deserialize the stream, most probably because the class for the object is not on the classpath.

    Do you generate the client jar while deploying the EJB jar and package and deploy it with the WAR?