Problemas com ServerSocket

ServerSocket ss = new ServerSocket(8080);

     while (true) {
                 JOptionPane.showMessageDialog(this, "Estabelecendo Conexão");
                 Socket socket = ss.accept(); 
                
                JOptionPane.showMessageDialog(this, "Conexao estabelecida");
                
                Server serv = new Server(socket);
                
                serv.setFmChamado(this);
                
                Thread t = new Thread(serv);
                t.start();