Task is hanging ....

Question

Hi,
While running a task from a ExecutorService, task is hanging ....
Controller :-
ExecutorService   service= Executors.newFixedThreadPool(2, new ThreadFactory() {
            @Override
            public Thread newThread(Runnable r) {
                Thread t=new Thread(r);
                t.setDaemon(true);
                return t;
        for(Worker w:table.getItems())
            service.execute(w);
Worker :-
public class Worker extends Task{
int contentLength=connection.getContentLength();
            if(contentLength<1){
                error("Content Length :"+String.valueOf(contentLength));
            System.out.println("Size :"+contentLength);
try {
while(status==DOWNLOADING){
start=System.currentTimeMillis();
int read=stream.read(buffer);
end=System.currentTimeMillis();
System.out.println("Start:"+start+" End :"+end+" Diff :"+(end-start));
rate=(1024/(end-start));
System.out.println("Rate :"+rate+" KBps");
} catch (IOException  ex) {
            System.out.println("Error :"+ex.toString());
If I comment calculating rate and displaying it task is working fine else it will run up to printing Size of File. Its also not throwing any Exception.
Please Help!!!
Thank in Advance
  Lijo

Answer 1

If I would hazard a guess, I would think that the while on line 30 is a busy loop (= while(true)). This might either be because the status is never updated, or the update is not visible in the current thread (status should be volatile).