Thread: socket closed

help, i get socket closed exception for this code:

package mash.craft.serv.server;
 
import java.net.*;
import java.io.*;
 
import com.mysql.jdbc.ConnectionFeatureNotAvailableException;
 
public class ServerThread implements Runnable {
    private ServerSocket socket1 = null;
    private Socket socket = null;
 
    public ServerThread(ServerSocket serverSocket) {
	this.socket1 = serverSocket;
    }
 
    public void run() {
 
	try {
		socket = socket1.accept();	//THIS IS LINE 19	
	    PrintWriter out = new PrintWriter(socket.getOutputStream(), true);
	    BufferedReader in = new BufferedReader(
				    new InputStreamReader(
				    socket.getInputStream()));
 
	    String inputLine, outputLine;
	    Protocol kkp = new Protocol();
	    outputLine = kkp.processInput("logged in");
	    out.println(outputLine);
 
	    while ((inputLine = in.readLine()) != null) {
		outputLine = kkp.processInput(inputLine);
		out.println(outputLine);
		if (outputLine.equals("stop"))
		    break;
	    }
	    out.close();
	    in.close();
	    socket.close();
 
	} catch (IOException e) {
	    e.printStackTrace();
	}
   }
}

and the error is in this link:
22:39:46 [SEVERE] java.net.SocketException: Socket is closed
22:39:46 [SEVERE] at java.net.ServerSocket.accept(Unknown Source)
22:39:46 [SEVERE] at mash.craft.serv.server.ServerThread.run(ServerThre ad.
java:19)