BufferedReader(System.in) readLine() method returning IOException, Stream closed

Question

Creating a simple chat service. I have a TCPServer program, and a TCPClient program. The programs are multithreaded, and my client program is supposed to take input from the terminal and send it to the server program. I'm having trouble with a simple while loop, and I'm at my wit's end.

I've tried BufferedReader(using .readLine() and Scanner(using .nextLine()) to try and read in messages. When I use .nextLine() I get a "java.util.NoSuchElementException: No line found", and when I use .readLine() I get a "java.io.IOException: Stream closed". Here's my code (this is my thread class, within my client program):

private static class SendingThread extends Thread{

private Socket socket;
//  private ArrayList<Socket> socketArray;

//Constructor
SendingThread(Socket socket){
    this.socket = socket;
    //      this.socketArray = socketArray;
}

public void run() {
    try {
        System.out.println("SendingThread run method executed");
        //Start timer
        long startTime = System.currentTimeMillis();

        //PrintWriter to pass messages to server
        PrintWriter out = new PrintWriter(socket.getOutputStream(),true); 
        System.out.println("PrintWriter instantiated");


        //Set up stream for keyboard entry
        BufferedReader userEntry = new BufferedReader(new InputStreamReader(System.in));
        System.out.println("BufferedReader instantiated");

        // Get data from the user and send it to the server
        String message;
        do{
            System.out.print("Enter message: ");
            message = userEntry.readLine();
            out.println(message);
        } while (!message.equals("DONE"));

        //Stop timer
        long endTime = System.currentTimeMillis();
        //Variables to measure time elapsed
        long totalTime = endTime - startTime;
        long milliseconds = totalTime % 1000;
        long seconds = (totalTime / 1000) % 60;
        long minutes = (totalTime / 60000) % 60;
        long hours = (totalTime / 3600000) % 60;

        //Receive final report and close connection
        System.out.println("\n*** Information received from the server ***");
        System.out.println("Length of session: " + hours + "::" + minutes + "::" + seconds + "::" + milliseconds);
    } catch(IOException e) {
        e.printStackTrace();
    } finally {
        try {
            System.out.println("\n!!!!! Closing connection... !!!!!");
            socket.close(); 
        } catch(IOException e) {
            System.out.println("Unable to disconnect!");
            System.exit(1);
        }
    }
}

}

The problem is at the second line in my do-while loop, that's where it throws the error. It doesn't wait for my input, just terminates.