How to start rmi on a computer with 2 network cards ?

Question

I would like to write a programm to get system informations from any linux computer connected to a network. A RMI server installed on each network computer measures the informations and send them to a RMI Client based on a central computer, where the information is stored on database.
Each computer is identified by its IP address. This is why the IP adress is sent with the string of system informations. For instance, the information sent for a CPU measure is :
<Computer>
<AddIP>192.168.1.1</AddIP>
<CPU><Frequency>500</Frequency><Brand>Intel</Brand></CPU>
</Computer>
In the case when a computer has two IP adresses : 192.168.1.1 and 192.168.2.64, if the computer is reached by 192.168.1.1 it should return the following string :
<Computer>
<AddIP>192.168.1.1</AddIP>
<CPU><Frequency>500</Frequency><Brand>Intel</Brand></CPU>
</Computer>
and if reached by 192.168.2.64 :
<Computer>
<AddIP>192.168.2.64</AddIP>
<CPU><Frequency>500</Frequency><Brand>Intel</Brand></CPU>
</Computer>
The string does not contains all IP adresses but these from which the computer was asked for a measurement. Here is the code for the RMI server :
public class ServeurAgent {
public ServeurAgent() {
try {
// we launched a RMI service for each IP address :
LocateRegistry.createRegistry(portRMIAgent);
// the 192.168.1.1 parameter for AgentImpl is only
     // used to generate the XML String
Agent agent1 = new AgentImpl(192.168.1.1);
Naming.rebind("rmi://192.168.1.1:1099/serviceRMI",agent);
Agent agent2 = new AgentImpl(192.168.2.64);
Naming.rebind("rmi://192.168.2.64:1099/serviceRMI",agent);
catch (Exception e) {
System.out.println("echec du lancement des Agents : "+e);
public static void main(String args[]) {
new ServeurAgent();
We hoped that when the RMI client asked for a measurement on one IP address we could get in the XML String the same IP address, but the problem is that whatever the IP adress is asked, the XML String always contains the same IP address. For example if we ask for a measurement on the 192.168.2.64 adress we have got :
<Computer>
<AddIP>192.168.1.1</AddIP>
<CPU><Frequency>500</Frequency><Brand>Intel</Brand></CPU>
</Computer>
instead of :
<Computer>
<AddIP>192.168.2.64</AddIP>
<CPU><Frequency>500</Frequency><Brand>Intel</Brand></CPU>
</Computer>
Do you have any idea of what could be the problem ? Is the code correctly written ?
Here is the code for the RMI client :
public void mesurer(ipAdress) {
try {
valeur_mesures = "";
          Agent agent = (Agent) Naming.lookup("rmi://"+ ipAdress +":1099/serviceRMI");
          // valeur_mesures is the XML string
          valeur_mesures = agent.getCPUs();
catch (MalformedURLException murle) {
System.out.println();
System.out.println("MalformedURLException");
System.out.println(murle);
catch (RemoteException re) {
System.out.println();
System.out.println("RemoteException");
System.out.println(re);
} catch (NotBoundException nbe) {
System.out.println();
System.out.println("NotBoundException");
System.out.println(nbe);
Thank you for your help.

Answer 1

You may have solved it by now but your code is using the wrong variables when binding objects:
Agent agent1 = new AgentImpl(192.168.1.1);
Naming.rebind("rmi://192.168.1.1:1099/serviceRMI",agent);
Agent agent2 = new AgentImpl(192.168.2.64);
Naming.rebind("rmi://192.168.2.64:1099/serviceRMI",agent);
Notice you are creating agents "agent1" and "agent2" but you are storing the stub of an instance called "agent".
Otherwise, it should work so long as the names you are binding the variables to are unique and not rebound anywhere else.