Impact of Daemon Thread Or Normal Thread When Application is Running in Development mode

What is the impact for using Daemon threads or Normal Threads in my Play Application. I am having some Akka Scheduler, and Quarts Schedulers. These are being start When Application start. My App is running in Dev mode, and whenever i made changes to my Source Code, it restart's / Auto Reload application that Cause Thread DeadLock. What is the best way to stopping these Threads.

1. Is it good to use Daemon Threads here ?
2. Will System.exit(0) will be Useful here ?
3. Is any Other way to stopping these running/waiting threads that are sleeping for a particular time in scheduling ?

I'm trying to do something like:

Akka.system().scheduler().schedule(Duration.create(2000, TimeUnit.MILLISECONDS), Duration.create(60000, TimeUnit.MILLISECONDS),
                () -> {
                    String url = Play.application().configuration().getString("localloadbalancer.ip");
                    url = url + "initCallOut";
                    Logger.info("Calling initcall from global.java::" + url);
                    HttpClient client = HttpClientBuilder.create().build();
                    HttpGet request = new HttpGet(url);
                    try {
                        HttpResponse response = client.execute(request);
                        int statusCode = response.getStatusLine().getStatusCode();
                        Logger.info("Status Code::" + statusCode);
                        if (statusCode == 200) {
                         //   Do stuff here
                        } else {
                         //    retry
                        }
                    } catch (IOException ex) {
                        Logger.error("Error in Initcall::" + ex.getMessage());
                    }
                }, Akka.system().dispatcher());

// Quartz scheduler starting here

   try {
     QuartzScheduler.startScheduler();
   }
   catch (Exception ex){
     System.out.println("Scheduler Exception::"+ex.getMessage());
   }

via Chebli Mohamed