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Apr 23rd, 2008

Rmi by Internet connection

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Hai Friends

Iam using RMI concept for my project, i want to connect client and server by using internet connection , but its working fine on LAN connection, it gives following Exception

Java Syntax (Toggle Plain Text)
java.lang.RuntimeException: java.rmi.ConnectException: Connection refused to hos
t: 125.17.11.229; nested exception is:
        java.net.ConnectException: Connection refused: connect
        at Client.init(Client.java:23)
        at sun.applet.AppletPanel.run(AppletPanel.java:417)
        at java.lang.Thread.run(Thread.java:619)
Caused by: java.rmi.ConnectException: Connection refused to host: 125.17.11.229; n
ested exception is:
        java.net.ConnectException: Connection refused: connect
        at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:601)
        at sun.rmi.transport.tcp.TCPChannel.createConnection(TCPChannel.java:198
)
java.lang.RuntimeException: java.rmi.ConnectException: Connection refused to hos
t: 125.17.11.229; nested exception is:
        java.net.ConnectException: Connection refused: connect
        at Client.init(Client.java:23)
        at sun.applet.AppletPanel.run(AppletPanel.java:417)
        at java.lang.Thread.run(Thread.java:619)
Caused by: java.rmi.ConnectException: Connection refused to host: 125.17.11.229; n
ested exception is:
        java.net.ConnectException: Connection refused: connect
        at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:601)
        at sun.rmi.transport.tcp.TCPChannel.createConnection(TCPChannel.java:198
)

125.17.11.229 is my internet IP

my code

Java Syntax (Toggle Plain Text)
Server:
import java.rmi.registry.LocateRegistry;
import java.rmi.registry.Registry;
import java.rmi.server.UnicastRemoteObject;
 
public class Server implements RemoteInterface
{
 
    public String getMessage()
    {
        return "Hello World";
    }
 
    public static void main(String args[])
    {
        try
        {
			String REGISTRY_NAME = "RMI_Example";
    int REGISTRY_PORT = 3032;
            Registry registry = LocateRegistry.getRegistry(REGISTRY_PORT);
            RemoteInterface remoteReference = 
                (RemoteInterface) UnicastRemoteObject.exportObject(new Server());
            registry.rebind(REGISTRY_NAME, remoteReference);
        }
        catch (Exception e)
        {
            throw new RuntimeException(e);
        }
    }
}
 
Interface:
 
import java.rmi.Remote;
import java.rmi.RemoteException;
 
public interface RemoteInterface extends Remote
{
      String getMessage() throws RemoteException;
}
 
 
client:import java.rmi.registry.LocateRegistry;
import java.rmi.registry.Registry;
import javax.swing.JApplet;
import javax.swing.JLabel;
import java.rmi.*;
 
public class ClientApplet 
{
 
public static void main(String arg[]) 
    {
		String REGISTRY_NAME = "RMI_Example";
    int REGISTRY_PORT = 3032;
 
        try
        {
            Registry registry = 
                LocateRegistry.getRegistry("125.17.11.229",REGISTRY_PORT);
            RemoteInterface remoteReference = 
                (RemoteInterface) registry.lookup(REGISTRY_NAME);
           System.out.println(remoteReference.getMessage());
        }
        catch (Exception e)
        {
            throw new RuntimeException(e);
        }
    }
}
Server:
import java.rmi.registry.LocateRegistry;
import java.rmi.registry.Registry;
import java.rmi.server.UnicastRemoteObject;

public class Server implements RemoteInterface
{
	  
    public String getMessage()
    {
        return "Hello World";
    }

    public static void main(String args[])
    {
        try
        {
			String REGISTRY_NAME = "RMI_Example";
    int REGISTRY_PORT = 3032;
            Registry registry = LocateRegistry.getRegistry(REGISTRY_PORT);
            RemoteInterface remoteReference = 
                (RemoteInterface) UnicastRemoteObject.exportObject(new Server());
            registry.rebind(REGISTRY_NAME, remoteReference);
        }
        catch (Exception e)
        {
            throw new RuntimeException(e);
        }
    }
}

Interface:

import java.rmi.Remote;
import java.rmi.RemoteException;

public interface RemoteInterface extends Remote
{
      String getMessage() throws RemoteException;
}


client:import java.rmi.registry.LocateRegistry;
import java.rmi.registry.Registry;
import javax.swing.JApplet;
import javax.swing.JLabel;
import java.rmi.*;

public class ClientApplet 
{
 
public static void main(String arg[]) 
    {
		String REGISTRY_NAME = "RMI_Example";
    int REGISTRY_PORT = 3032;

        try
        {
            Registry registry = 
                LocateRegistry.getRegistry("125.17.11.229",REGISTRY_PORT);
            RemoteInterface remoteReference = 
                (RemoteInterface) registry.lookup(REGISTRY_NAME);
           System.out.println(remoteReference.getMessage());
        }
        catch (Exception e)
        {
            throw new RuntimeException(e);
        }
    }
}

plz help me for this problem...

Last edited by ~s.o.s~; Apr 30th, 2008 at 4:01 pm. Reason: Added code tags, learn to use them.

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Firewall?

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either that or the server process is bound to the local network address and therefore trying to call the process through its external address isn't going to get a response.

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duckman

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Apr 29th, 2008

Re: Rmi by Internet connection

When iam using external ip(125.17.11.232) to connect server its working fine in LAN but it gives error when iam try to run in internet connection
Exception in thread "main" java.lang.RuntimeException: java.rmi.ConnectIOExcepti
on: Exception creating connection to: 194.9.30.245 nested exception is:

In error show my server local ip 194.9.30.245 ,

coding:
Server :
Server.java

import java.rmi.registry.LocateRegistry;
import java.rmi.registry.Registry;
import java.rmi.server.UnicastRemoteObject;

public class Server implements RemoteInterface
{

public String getMessage()
{
return "Hello World";
}

public static void main(String args[])
{
try
{
String REGISTRY_NAME = "RMI_Example";
int REGISTRY_PORT = 60020;
Registry registry = LocateRegistry.getRegistry(REGISTRY_PORT);
RemoteInterface remoteReference =
(RemoteInterface) UnicastRemoteObject.exportObject(new Server());
registry.rebind(REGISTRY_NAME, remoteReference);
}
catch (Exception e)
{
throw new RuntimeException(e);
}
}
}
--------------------------------------
Interface
RemoteInterface.java

import java.rmi.Remote;
import java.rmi.RemoteException;

public interface RemoteInterface extends Remote
{
String getMessage() throws RemoteException;
}
-----------------------------------------------------------
Client

import java.rmi.registry.LocateRegistry;
import java.rmi.registry.Registry;
import javax.swing.JApplet;
import javax.swing.JLabel;
import java.rmi.*;

public class ClientApplet
{

public static void main(String arg[])
{
String REGISTRY_NAME = "RMI_Example";
int REGISTRY_PORT = 60020;

try
{
Registry registry =
LocateRegistry.getRegistry("125.17.11.232",REGISTRY_PORT);
RemoteInterface remoteReference =
(RemoteInterface) registry.lookup(REGISTRY_NAME);
System.out.println(remoteReference.getMessage());
}
catch (Exception e)
{
throw new RuntimeException(e);
}
}
}

Please send me solution for this problem

Venks

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Jul 2nd, 2008

Re: Rmi by Internet connection

any solution for this problem...

Venks

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Jul 2nd, 2008

Re: Rmi by Internet connection

Maybe, if you were to show what the nested exception is.

masijade

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Jul 3rd, 2008

Re: Rmi by Internet connection

java.rmi.ConnectIOException: Exception creating connection to: 194.9.30.242; nested exception is:
java.net.NoRouteToHostException: No route to host: connect
this is my Exception

Venks

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Jul 3rd, 2008

Re: Rmi by Internet connection

That is, seemingly, not a publicly available ip address (i.e. can't be reached from the internet, at all), or you are attempting it to access throught the wrong interface on your computer, and so have no network path to it.

masijade

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Jul 3rd, 2008

Re: Rmi by Internet connection

im using public ip in my client,what are the changes that i have to do in my program? in client or server program?

Venks

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