Wsrtjtyk

I have two machines:

Server: AWS - EC2 - Ubuntu 18.04 Lts

Client: Windows 10

If I try run my code just in AWS machine it's work normally, but if i try same in other machine I have ConnectionRefused by time in Client machine

Code:

AloMundoServidor.java

import java.rmi.registry.LocateRegistry;

import java.rmi.registry.Registry;

import java.rmi.server.UnicastRemoteObject;

import java.io.*; 



public class AloMundoServidor implements AloMundo {

private static int count, fila = 0;

private static boolean lock;



public AloMundoServidor() {}



public String digaAloMundo() throws Exception {

    System.out.println("Chamada de aplicacao Cliente recebida! " + count);

    /*fila++;

    if(lock){

        try { 

            wait();

        } catch (InterruptedException e)  {

            Thread.currentThread().interrupt(); 

            //Log.error("Thread interrupted", e); 

        }

    }

    lock = true;

    */

    File file = new File("test.txt"); 



    BufferedReader reader = new BufferedReader(new FileReader(file)); 



    String text = "", line; 

    while ((line = reader.readLine()) != null) {

        text = text + "n" + line; 

    } 



    count++;

    Thread.sleep(5000);



    // fila--;

    // notify();

    // if(fila==0) {    

        // lock = false;

    // }        



    return text;

}



public static void main(String args) {

    count = 0;

    lock = false;

    try {

        AloMundoServidor obj = new AloMundoServidor();

        AloMundo stub = (AloMundo) UnicastRemoteObject.exportObject(obj, 0);

        Registry registry = LocateRegistry.getRegistry();

        registry.bind("AloMundo", stub);

        System.out.println("Servidor pronto!");

    } catch (Exception e) {

        System.err.println("Capturando excecao no Servidor: " + e.toString());

        e.printStackTrace();

    }

}

AluMundoCliente.java:

import java.rmi.registry.LocateRegistry;

import java.rmi.registry.Registry;



public class AloMundoCliente {

private AloMundoCliente() {}

public static void main(String args) {

    String host = "54.244.xxx.xxx";

    try {

            Registry registry = LocateRegistry.getRegistry(host);

            AloMundo stub = (AloMundo) registry.lookup("AloMundo");

            String resposta = stub.digaAloMundo();

            System.out.println("resposta: " + resposta);

        } catch (Exception e) {

            System.err.println("Capturando a exceção no Cliente: " + e.toString());

            e.printStackTrace();

        }

    }

}

AloMundo.java

import java.rmi.Remote;

import java.rmi.RemoteException;



public interface AloMundo extends Remote {

    String digaAloMundo() throws Exception;

}

I execute telnet 54.244.xxx.xxx 1099 and its listing.
I tried java AloMundoServidor -Djava.rmi.server.hostname='54.244.xxx.xxx'
And no sucess!

Edit.:Solved

Launch cliente:

java -Djava.security.policy=server.policy AloMundoCliente

Modified ClienteCode in Registry with server IP:

Registry registry = LocateRegistry.getRegistry("xx.xx.xx.xx");

Create server.policy:

grant{

    permission java.security.AllPermission;

};

Launch server:

java -Djava.security.policy=server.policy -Djava.rmi.server.hostname=XX.XX.XX.XX AloMundoServer