Name: rm29839 Date: 03/05/98


I am trying to connect a Corba Client on my NT-computer to a Corba Server
on another Computer. For my thesis I am developing a distributed database
test application in Java, which will synchronize the distributed
database by sending the information af a local update to the other database
site(s).

By pinging I obtained the IP addres of my Server computer. I started my Server with:
java Test2 -ORBInitialHost 10.1.6.85 -ORBInitialPort 900 2
This Server is still grinding away, even while I am writing this question.

The Client I also started with:
java Test -ORBInitialHost 10.1.6.85 -ORBInitialPort 900 1
So the Client has the same IP address as the Server.

When initializing the ORB I got a NullPointerException. A NullPointerException
usually means a Programmers error, meaning me. But the problem is, I can connect
the Client and Server with allmost the same code, when both Client and Server run
on one computer. So this Exception beats me.

The important code of the Client's constructor is:
   public Client (String [] args) {

       String [] parameters = new String [5];
       parameters [0] = args [0]; // -ORBInitialHost
       parameters [1] = args [1]; // IP-address Server/Host
       parameters [2] = args [2]; // -ORBInitialPort
       parameters [3] = args [3]; // The port
         if (args [4].equals ("1"))
           name = "Receiver2";
       else name = "Receiver1";

       try {
           System.err.println ("Name class: "+ this.toString());
           System.err.println ("parameters are:");
           System.err.println ("parameters[0]: " + parameters[0]);
           System.err.println ("parameters[1]: " + parameters[1]);
           System.err.println ("parameters[2]: " + parameters[2]);
           System.err.println ("parameters[3]: " + parameters[3]);
           ORB orb = ORB.init (parameters, null);

At which place I encounter the NullPointerException:
Name class: Client@14354c34
parameters are:
parameters[0]: -ORBInitialHost
parameters[1]: 10.1.6.85
parameters[2]: -ORBInitialPort
parameters[3]: 900
Client exception: java.lang.NullPointerException:
java.lang.NullPointerException:
at com.sun.CORBA.iiop.ORB.findPropertiesFromArgs(ORB.java:325)
at com.sun.CORBA.iiop.ORB.set_parameters(ORB.java:514)
at org.omg.CORBA.ORB.init(ORB.java:201)
at Client.<init>(Client.java:49)
at Test.main(Test.java:16)
Test: Sending message
Client.sendMessage()
Client.sendMessage(): message serialized
java.lang.NullPointerException:
at Client.sendMessage(Client.java:90)
at Test.main(Test.java:20)

Please e-mail me the answer.
(Review ID: 25991)
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