BlockingQueue on SMP (Multiprocessor)

Question

hi guys,
i wrote an udpmulticast application, it has some threads.
thread 1 gets a datagramm-packet from socket with receive, creates an object and puts it (with offer-method) in the blockingqueue (LinkedBlockingQueue impl.)
thread 2 gets objects from the queue with poll-method
the problem:
on my laptop (single cpu) works the app fine
but on an multicpu-computer it works with errors, poll-method returns not all objects, etc.
are blockingqueue implementations threadsafe in smp environment?
many thanks,
grigory

Answer 1

is it possible i have a bug in my code?Yes.
why not sun too?Yes, they can have bugs too, but it's more likely that you have a bug.
With multiple processors those bugs appear a lot easier than with just one, so even though your code works with one processor, you might've written some bad code that exhibits these problems on an SMP machine.