Issue 17856: multiprocessing.Process.join does not block if timeout is lower than 1 (original) (raw)

In Python 3.3, multiprocessing.Process.join() is not blocking with floats lower than 1.0 (not included). It works as expected (ie. blocking for the specified timeout) in Python 2.6->3.2

As you can see in this example, calling join() with 0.99 returns immediately.

$ python3.3 Python 3.3.1 (default, Apr 6 2013, 13:58:40) [GCC 4.7.2] on linux Type "help", "copyright", "credits" or "license" for more information.

import time import multiprocessing def foo(): ... time.sleep(1000) ... p = multiprocessing.Process(target=foo) p.start() bar = time.time(); p.join(0.99); print(time.time()-bar) 0.015963315963745117 p.is_alive() True bar = time.time(); p.join(1.0); print(time.time()-bar) 1.0011239051818848 p.is_alive() True