ansible play hangs on MacOSX

[shirou]

Ansible Version:

ansible-playbook 2.0.0
  config file = /Users/shirou/tmp/ansible/ansible.cfg
  configured module search path = None

installed from 7eaacaf

Ansible Configuration:

nothing special.

Environment:

• Mac OS X (yosemite)
• Python 2.7.9

Summary:

ansible-playbook command hangs up after this error.

Traceback (most recent call last):
  File "/Users/shirou/Works/VEnvs/ansiblev2/lib/python2.7/site-packages/ansible-2.0.0-py2.7.egg/ansible/executor/process/result.py", line 103, in run
    result = self._read_worker_result()
  File "/Users/shirou/Works/VEnvs/ansiblev2/lib/python2.7/site-packages/ansible-2.0.0-py2.7.egg/ansible/executor/process/result.py", line 75, in _read_worker_result
    if rslt_q.qsize() > 0:
  File "/usr/local/Cellar/python/2.7.9/Frameworks/Python.framework/Versions/2.7/lib/python2.7/multiprocessing/queues.py", line 143, in qsize
    return self._maxsize - self._sem._semlock._get_value()
NotImplementedError

PLAY ***************************************************************************

TASK [debug msg=hangs] *********************************************************

I thinks because Queue.qsize() is not implemented at Mac OS X.
see https://github.com/python/cpython/blob/829b49cbd2e4b1d573470da79ca844b730120f3d/Lib/multiprocessing/queues.py#L116

Steps To Reproduce:

run any playbook like

- hosts: all
  gather_facts: no
  connection: local
  tasks:
    - debug: msg="hangs"

Expected Results:

play runs.

Actual Results:

It seems play hang up.

[bcoca]

@shirou please confirm that PR fixes the issue, I don't have OS X to test on

[shirou]

Thank you for quick fix! It works on my environment.

[benjixx]

I just ran into the same issue on Mac OS X. I can verify that the PR fixes this.