Under what conditions will BlockingQueue.take throw interrupted exception?

Poison Pill:A good way to signal termination of a blocking queue is to submit a 'poison' value into the queue that
indicates a shutdown has occurred. This ensures that the expected behavior of the queue is honored. Calling Thread.interupt() is probably not a good idea if you care about clearing the queue.

To provide some code:

boolean shutdown = false;while (!shutdown) {
try {
WorkItem w = inQueue.take();
if (w == QUEUE_IS_DEAD)
shutdown = true;
else
w.consume();
} catch (InterruptedException e) {
// possibly submit QUEUE_IS_DEAD to the queue
}}