Thread Pool Is Not Terminating

Question

Hi All;
I am trying to stop java program which are running continuously in a while loop and loop is looking for a stop file.
When I am trying to stop java program through a Unix stop script, which will create a stop file .
It is working fine with normal program where threading is not involved but multi threaded program(Via Thread pool) it is not working.
Could you please refer below sample program which using Thread pool,
ThreadPoolExecutor threadPool = new ThreadPoolExecutor(5, 5, 10,
                         TimeUnit.SECONDS, new LinkedBlockingQueue<Runnable>());
               threadPool.prestartAllCoreThreads();
               File f=new File("/app/cbf/stop");
               while(!f.isFile()){
               new JavaTest().start(threadPool);
Could any body please suggest me on this.
Thanx & Regards

Answer 1

Here is the complete code,
import java.io.File;
import java.io.IOException;
import java.util.Properties;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
public class JavaTest {
     public void start(ThreadPoolExecutor threadPool) {
          threadPool.execute(new JavaThread());
     public void stop(ThreadPoolExecutor threadPool) {
          threadPool.shutdown();
          System.out.println("Stopping thread pool");
     * @param args
     public static void main(String[] args) throws IOException {
          // TODO Auto-generated method stub
          Properties p = new Properties();
          p.keys();
          try {
               ThreadPoolExecutor threadPool = new ThreadPoolExecutor(5, 5, 10,
                         TimeUnit.SECONDS, new LinkedBlockingQueue<Runnable>());
               threadPool.prestartAllCoreThreads();
               File f = new File("C:/stop");
               while (!f.isFile()) {
                    new JavaTest().start(threadPool);
               new JavaTest().stop(threadPool);
          } catch (Exception ex) {
               ex.printStackTrace();
}