Client disconnected from server after about 10 minutes of inactivity

[john price]

My client is disconnected from the server after about 10 minutes of inactivity. Why is this? I do not have anything in my code that does that. The program stays up, but the connection between the client and server is lost. Why is this and how can I fix it?
NOTE: My client code is over 1k lines long, so you probably don't want me posting that. It hopefully is just a general problem that can be fixed...
Server code:

import java.io.*;
import java.net.*;
import java.util.*;

public class SimpleChatServer {
ArrayList clientOutputStreams;
public class ClientHandler implements Runnable {
BufferedReader reader;
Socket sock;
public ClientHandler(Socket clientSocket) {
try {
sock = clientSocket;
InputStreamReader isReader = new InputStreamReader(sock.getInputStream());
reader = new BufferedReader(isReader);
}
catch(Exception ex) {
System.out.println("from server");
ex.printStackTrace();
}
}
public void run() {
String message;
try {
while ((message = reader.readLine()) != null) {
System.out.println("read " + message);
tellEveryone(message);
}
}
catch(Exception ex) {
ex.printStackTrace();
}
}
}
@SuppressWarnings("unchecked") 
public static void main (String[] args) {
new SimpleChatServer().go();
}
@SuppressWarnings("unchecked") 
public void go() {
clientOutputStreams = new ArrayList();
try {
ServerSocket serverSock = new ServerSocket(5000);
while(true) {
Socket clientSocket = serverSock.accept();
PrintWriter writer = new PrintWriter(clientSocket.getOutputStream());
clientOutputStreams.add(writer);
Thread t = new Thread(new ClientHandler(clientSocket));
t.start();
System.out.println("got a connection");
}
}
catch(Exception ex) {
System.out.println("From System");
ex.printStackTrace();
}
}
public void tellEveryone(String message) {

Iterator it = clientOutputStreams.iterator();
while(it.hasNext()) {
try {
PrintWriter writer = (PrintWriter) it.next();
writer.println(message);
writer.flush();
}
catch(Exception ex) {
System.out.println("From System");
ex.printStackTrace();
}
}
}
}

Thanks,
cc11rocks aka John Price

[john price]

Fine...
Server code:

import java.io.*;
import java.net.*;
import java.util.*;

public class SimpleChatServer {
ArrayList clientOutputStreams;
	public class ClientHandler implements Runnable {
		BufferedReader reader;
		Socket sock;
		public ClientHandler(Socket clientSocket) {
			try {
				sock = clientSocket;
				InputStreamReader isReader = new InputStreamReader(sock.getInputStream());
				reader = new BufferedReader(isReader);
				}
			catch(Exception ex) {
				System.out.println("from server");
				ex.printStackTrace();
			}
		}
	public void run() {
	String message;
		try {
			while ((message = reader.readLine()) != null) {
			System.out.println("read " + message);
			tellEveryone(message);
			}
		}
		catch(Exception ex) {
		ex.printStackTrace();
		}
	}
	}
@SuppressWarnings("unchecked") 
public static void main (String[] args) {
new SimpleChatServer().go();
}
@SuppressWarnings("unchecked") 
public void go() {
clientOutputStreams = new ArrayList();
	try {
	ServerSocket serverSock = new ServerSocket(5000);
		while(true) {
		Socket clientSocket = serverSock.accept();
		PrintWriter writer = new PrintWriter(clientSocket.getOutputStream());
		clientOutputStreams.add(writer);
		Thread t = new Thread(new ClientHandler(clientSocket));
		t.start();
		System.out.println("got a connection");
		}
	}
	catch(Exception ex) {
	System.out.println("From System");
	ex.printStackTrace();
	}
}
public void tellEveryone(String message) {

Iterator it = clientOutputStreams.iterator();
	while(it.hasNext()) {
		try {
		PrintWriter writer = (PrintWriter) it.next();
		writer.println(message);
		writer.flush();
		}
		catch(Exception ex) {
		System.out.println("From System");
		ex.printStackTrace();
		}
	}
	}
}

Would this fix the problem?

 sock.setKeepAlive(true);

[Rob Spoor]

Possibly. The best way to find out is to try it out.
(And I'm not just saying this to avoid giving the answer - I just don't know for sure.)

[john price]

I tried it...It didn't work. I found a work-around, but I am sure there is something I can do. I shouldn't have to use the workaround...
The workaround I am doing is setting off a "fake" message to keep it inactive. This will not do when I distribute...
Thanks,
cc11rocks aka John Price

[john price]

BUMP and Change.
I meant to say "to keep it active" instead of "to keep it inactive".
John Price aka cc11rocks

[john price]

I had to go into Windows to fix this:
Control Panel > Installed Updated > Turn Windows Features on or Off > (CheckBox) Simple TCPIP services (i.e. echo, daytime etc)
Works like a charm now.
cc11rocks aka John Price