new file mode 100644

@@ -0,0 +1,2 @@

+bugfixes:

+- TaskQueueManager - Explicitly set the mutliprocessing start method to ``fork`` to avoid issues with the default on macOS now being ``spawn``.

@@ -19,7 +19,6 @@

 from __future__ import (absolute_import, division, print_function)

 __metaclass__ = type

-import multiprocessing

 import os

 import sys

 import traceback

@@ -41,13 +40,14 @@ from ansible.executor.task_executor import TaskExecutor

 from ansible.executor.task_result import TaskResult

 from ansible.module_utils._text import to_text

 from ansible.utils.display import Display

+from ansible.utils.multiprocessing import context as multiprocessing_context

 __all__ = ['WorkerProcess']

 display = Display()

-class WorkerProcess(multiprocessing.Process):

+class WorkerProcess(multiprocessing_context.Process):

     '''

     The worker thread class, which uses TaskExecutor to run tasks

     read from a job queue and pushes results into a results queue

@@ -19,7 +19,6 @@

 from __future__ import (absolute_import, division, print_function)

 __metaclass__ = type

-import multiprocessing

 import os

 import tempfile

@@ -41,6 +40,7 @@ from ansible.utils.helpers import pct_to_int

 from ansible.vars.hostvars import HostVars

 from ansible.vars.reserved import warn_if_reserved

 from ansible.utils.display import Display

+from ansible.utils.multiprocessing import context as multiprocessing_context

 __all__ = ['TaskQueueManager']

@@ -97,7 +97,7 @@ class TaskQueueManager:

         self._unreachable_hosts = dict()

         try:

-            self._final_q = multiprocessing.Queue()

+            self._final_q = multiprocessing_context.Queue()

         except OSError as e:

             raise AnsibleError("Unable to use multiprocessing, this is normally caused by lack of access to /dev/shm: %s" % to_native(e))

new file mode 100644

@@ -0,0 +1,21 @@

+# Copyright (c) 2019 Matt Martz <matt@sivel.net>

+# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)

+

+# Make coding more python3-ish

+from __future__ import (absolute_import, division, print_function)

+__metaclass__ = type

+

+import multiprocessing

+

+# Explicit multiprocessing context using the fork start method

+# This exists as a compat layer now that Python3.8 has changed the default

+# start method for macOS to ``spawn`` which is incompatible with our

+# code base currently

+#

+# This exists in utils to allow it to be easily imported into various places

+# without causing circular import or dependency problems

+try:

+    context = multiprocessing.get_context('fork')

+except AttributeError:

+    # Py2 has no context functionality, and only supports fork

+    context = multiprocessing