test_multiprocessing_spawn fails on Windows7 3.x buildbot

[pablogsal]

BPO	36394
Nosy	@pfmoore, @tjguk, @zware, @zooba, @pablogsal
PRs	bpo-36394: Raise the timeout in test_multiprocessing_* for slow buildbots #12489

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = None
closed_at = <Date 2019-08-02.22:05:28.107>
created_at = <Date 2019-03-22.00:00:00.570>
labels = ['3.8', 'tests', 'OS-windows']
title = 'test_multiprocessing_spawn fails on Windows7 3.x buildbot'
updated_at = <Date 2019-08-02.22:05:28.107>
user = 'https://github.com/pablogsal'

bugs.python.org fields:

activity = <Date 2019-08-02.22:05:28.107>
actor = 'steve.dower'
assignee = 'none'
closed = True
closed_date = <Date 2019-08-02.22:05:28.107>
closer = 'steve.dower'
components = ['Tests', 'Windows']
creation = <Date 2019-03-22.00:00:00.570>
creator = 'pablogsal'
dependencies = []
files = []
hgrepos = []
issue_num = 36394
keywords = ['patch']
message_count = 1.0
messages = ['338573']
nosy_count = 5.0
nosy_names = ['paul.moore', 'tim.golden', 'zach.ware', 'steve.dower', 'pablogsal']
pr_nums = ['12489']
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = None
url = 'https://bugs.python.org/issue36394'
versions = ['Python 3.8']

[pablogsal]

https://buildbot.python.org/all/#/builders/58/builds/2098/steps/3/logs/stdio

Process Process-2:
Traceback (most recent call last):
  File "D:\cygwin\home\db3l\buildarea\3.x.bolen-windows7\build\lib\multiprocessing\process.py", line 302, in _bootstrap
    self.run()
  File "D:\cygwin\home\db3l\buildarea\3.x.bolen-windows7\build\lib\multiprocessing\process.py", line 99, in run
    self._target(*self._args, **self._kwargs)
  File "D:\cygwin\home\db3l\buildarea\3.x.bolen-windows7\build\lib\test\_test_multiprocessing.py", line 4585, in child
    join_process(p)
  File "D:\cygwin\home\db3l\buildarea\3.x.bolen-windows7\build\lib\test\_test_multiprocessing.py", line 88, in join_process
    support.join_thread(process, timeout=TIMEOUT)
  File "D:\cygwin\home\db3l\buildarea\3.x.bolen-windows7\build\lib\test\support\__init__.py", line 2244, in join_thread
    raise AssertionError(msg)
AssertionError: failed to join the thread in 30.0 seconds
Timeout (0:15:00)!

======================================================================
FAIL: test_abort (test.test_multiprocessing_spawn.WithManagerTestBarrier)
----------------------------------------------------------------------

Traceback (most recent call last):
  File "D:\cygwin\home\db3l\buildarea\3.x.bolen-windows7\build\lib\test\_test_multiprocessing.py", line 1765, in test_abort
    self.assertEqual(len(results2), self.N-1)
AssertionError: 5 != 4

---

Ran 344 tests in 717.841s
FAILED (failures=1, skipped=40)
1 test failed again:
test_multiprocessing_spawn
== Tests result: FAILURE then FAILURE ==
388 tests OK.

Looks like a race condition, new builds are OK.