Calling EJB From a Servlet..

[Prashant Gaikwad]

HI Friends,
            I'm having a serious problem in my code and am unable to
understand. I've deployed a simple Hello bean on the orion container and
want to access it from a servlet. I have the servlet in
D:\Oracle\iSuites\j2ee\home\default-web-app\WEB-INF\classes\trg\HelloServlet
. Following is the code in servlet

 try {

                        trace("In Try");
                        Hashtable h = new Hashtable();
        
h.put(javax.naming.Context.INITIAL_CONTEXT_FACTORY,"com.evermind.server.rmi.
RMIInitialContextFactory");
                        h.put(javax.naming.Context.SECURITY_PRINCIPAL,
"ejb");
                        h.put(javax.naming.Context.SECURITY_CREDENTIALS,
"ejbadmin");
        
h.put(javax.naming.Context.PROVIDER_URL,"ormi://localhost/Hello");
                        trace("Before Init Contect ");
                        Context context = new InitialContext (h);
                        trace("after Initial context");
                            Object boundObject =
context.lookup("java:comp/env/ejb/HelloHome");
                             trace("At Trap");
                           helloHome = (HelloHome)
javax.rmi.PortableRemoteObject.narrow(boundObject,HelloHome.class);
                              }
                           catch (Throwable exception) {
                                        exception.printStackTrace();
        
                 //System.out.println("Look up exception :" +
exception.toString());
         //throw new ServletException(
         //   "Unable to get home interface: " + exception.toString());
      }


 When I run servlet from browser I get an exception when the Context is
getting crerated as  folloew             

D:\Oracle\iSuites\j2ee\home>java -jar orion.jar
Oracle9iAS (1.0.2.2) Containers for J2EE initialized
ConstructorBefore TryIn TryBefore Init Contect
java.lang.NullPointerException: d
omain was null
        at com.evermind.server.rmi.RMIServer.addNode(RMIServer.java:428)
        at
com.evermind.server.rmi.RMIServer.getConnection(RMIServer.java:497)
        at
com.evermind.server.rmi.RMIInitialContextFactory.getInitialContext(RM
IInitialContextFactory.java:150)
        at javax.naming.spi.NamingManager.getInitialContext(Unknown Source)
        at javax.naming.InitialContext.getDefaultInitCtx(Unknown Source)
        at javax.naming.InitialContext.init(Unknown Source)
        at javax.naming.InitialContext.<init>(Unknown Source)
        at trg.HelloServlet.init(HelloServlet.java:49)
        at
com.evermind.server.http.HttpApplication.loadServlet(HttpApplication.
java:1580)
        at
com.evermind.server.http.HttpApplication.findServlet(HttpApplication.
java:3722)
        at
com.evermind.server.http.HttpApplication.getRequestDispatcher(HttpApp
lication.java:1995)
        at
com.evermind.server.http.HttpRequestHandler.processRequest(HttpReques
tHandler.java:444)
        at
com.evermind.server.http.HttpRequestHandler.run(HttpRequestHandler.ja
va:189)
        at com.evermind.util.ThreadPoolThread.run(ThreadPoolThread.java:62)
In _hello




Please let me know where I'm going wrong. 
Thanks in advance
Prashant