Server hangs up when tryin to read object Urgent Help Plz

Question

Hi,
I've been working on a client-server model for a while, I've tested my applicaction a thousand of times locally (I mean, server and serveral clients running on the same machine) and it's ok, now I finally run server in a remote host and I find it rarely works fine, most of the times server hangs up when tryin to read objects I dont know why.
this is the part of the server-code where the problem begins:
public int EscucharSocket(){
        Socket cliente = null;
        System.out.println("Servidor en escucha...\n");
        while(true){
            try{
                cliente = SocketS.accept();
                //I get client's ip and port
                String ip = cliente.getInetAddress().getHostAddress();
                int puerto = cliente.getPort();
                //After the conexion is made, server reads a signature to
                //identify the client
               //in function process I check if the signature is valid
               //SignedData is a class where I wrap the signiture (obviously
               //it implements Serializable interface
               process((SignedData)le.LeerObject(cliente));
               //Other things done here
            catch (Exception e) { }
}le is a class I use to read,write data to the socket, this is the code of the LeerObject function
public Object LeerObject(Socket c) throws Exception {
       //Here Is where the server hangs up
        ObjectInputStream b = new ObjectInputStream(c.getInputStream());
        return b.readObject();
}As I wrote when running locally, there is no problem, but when I have a remote host, that happens
Any help or idea?

Answer 1

Hi again, thnx for your help
I modified my LE class so I just create a couple of Input/Output Streams per client (on server n client program), this is now the complete code of the class:
import java.net.*;
import java.io.*;
public class LE {
    DataOutputStream     dos;
    ObjectOutputStream  oos;
    DataInputStream        dis;
    ObjectInputStream     ois;
    //Streams are created just once in the constructor
    public LE (Socket s) throws Exception {
        dos = new DataOutputStream(s.getOutputStream());
         //I'm not sure if this flush has any sense
        dos.flush();
        oos = new ObjectOutputStream (s.getOutputStream());
        oos.flush();
        dis = new DataInputStream(s.getInputStream());
        ois = new ObjectInputStream (s.getInputStream());
    public void EscribirByte(byte datos[],int len) throws Exception {
        dos.write(datos,0,len);
        dos.flush();
    public void EscribirString(String dato) throws Exception {
        dos.writeUTF(dato);
        dos.flush();
    public void EscribirChar(char dato) throws Exception {
        dos.writeChar(dato);
        dos.flush();       
    public void EscribirInt(int dato) throws Exception {
        dos.writeInt(dato);
        dos.flush();
    public void EscribirLong(long dato) throws Exception {
        dos.writeLong(dato);
        dos.flush();
    public void EscribirObject(Object dato) throws Exception {
        oos.writeObject(dato);
        oos.flush();
    public String LeerString() throws Exception {       
        return dis.readUTF();
    public int LeerInt() throws Exception {       
        return dis.readInt();
    public char LeerChar() throws Exception {       
        return dis.readChar();
    public long LeerLong() throws Exception {       
        return dis.readLong();
    public Object LeerObject() throws Exception {       
        return ois.readObject();
}part of code of server and client, where the conexion is made and the LE object is created
Server:
try{
       cliente = SocketS.accept();               
       //After accepting the conexion the LE object is created
        le = new LE(cliente);
        //I get client's ip and port
        String ip = cliente.getInetAddress().getHostAddress();
        int puerto = cliente.getPort();
        //Object wraping signature is read        
        process((SignedData)le.LeerObject());
        //other control operations doing here
        //A thread is created to receive requests from client
        //(reference to LE object is passed to the thread
       ConexionCliente c = new ConexionCliente (cliente,id_persona,id_grupo,tipo_usuario,backup,le);                               
        //thread is started
        c.start();
catch (Exception e) {
    try {
        cliente.close();
    catch(Exception e2){}
}Cliente code:
try{
   //it connects to the server
   c=new Socket(host,puerto);
   //After accepting the conexion the LE object is created         
   le = new LE(c);
   //other things made here to genarate SignedData Object
  //It sends signed data object
  le.EscribirObject(Data);          
  //A thread is created and started to receive messages from server
  //reference to object LE is sent to the thread to avoid the need of
  //creating another
  new ConexionServidorClient(c,id_persona,ci,le).start();
  return 1;
catch(Exception e) {
   return -1;
}after the change, itworks a little better, but still most of the times server hangs up, I can't make server operational yet and I dont have any idea for solving this issue