python multiprocessing pool terminate

Question

I\'m working on a renderfarm, and I need my clients to be able to launch multiple instances of a renderer, without blocking so the client can receive new commands. I\'ve got

Answer 1

I found solution: stop pool in separate thread, like this:

def close_pool():
    global pool
    pool.close()
    pool.terminate()
    pool.join()

def term(*args,**kwargs):
    sys.stderr.write('\nStopping...')
    # httpd.shutdown()
    stophttp = threading.Thread(target=httpd.shutdown)
    stophttp.start()
    stoppool=threading.Thread(target=close_pool)
    stoppool.daemon=True
    stoppool.start()


signal.signal(signal.SIGTERM, term)
signal.signal(signal.SIGINT, term)
signal.signal(signal.SIGQUIT, term)

Works fine and always i tested.

signal.SIGINT

Interrupt from keyboard (CTRL + C). Default action is to raise KeyboardInterrupt.

signal.SIGKILL

Kill signal. It cannot be caught, blocked, or ignored.

signal.SIGTERM

Termination signal.

signal.SIGQUIT

Quit with core dump.