[Tutor] Bug? multiprocessing.JoinableQueue

[eryksun]

On Mon, Jul 15, 2013 at 11:21 PM, Jordan <wolfrage8765 at gmail.com> wrote:
>
> The interactive session returns immediately, no pause or wait.
> If I use timeout=1.01 then the interactive session pauses as expected, or
> any number other than 1 for the matter.

The bug you found is fixed in 3.3.2. Depending on the speed of your
machine, even a timeout slightly larger than 1 (e.g. 1.000001) would
trigger the rounding problem.

See issue 17707:
http://bugs.python.org/issue17707

The poll timeout in milliseconds was being calculated incorrectly:

    # 3.3.1
    timeout = int(timeout) * 1000  # timeout is in milliseconds

http://hg.python.org/cpython/file/d9893d13c628/Lib/multiprocessing/connection.py#l865

    # 3.3.2
    timeout = int(timeout * 1000) # timeout is in milliseconds

http://hg.python.org/cpython/file/d047928ae3f6/Lib/multiprocessing/connection.py#l865