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[3.6] bpo-26762, bpo-31019: Backport multiprocessing fixes from master to 3.6#2879

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vstinner merged 5 commits intopython:3.6from
vstinner:multiprocessing36
Jul 26, 2017
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[3.6] bpo-26762, bpo-31019: Backport multiprocessing fixes from master to 3.6#2879
vstinner merged 5 commits intopython:3.6from
vstinner:multiprocessing36

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@vstinner vstinner commented Jul 26, 2017 •
edited by bedevere-bot
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vstinner added 5 commits July 26, 2017 04:23
@vstinner
bpo-26762: Avoid daemon process in _test_multiprocessing (#2842)
d3e2e4e 
test_level() of _test_multiprocessing._TestLogging now uses regular
processes rather than daemon processes to prevent zombi processes
(to not "leak" processes).
(cherry picked from commit 0663495)
@vstinner
test_multiprocessing: Fix dangling process/thread (#2850)
0d293fd 
bpo-26762: Fix more dangling processes and threads in
test_multiprocessing:

* Queue: call close() followed by join_thread()
* Process: call join() or self.addCleanup(p.join)
(cherry picked from commit d7e64d9)
@vstinner
test_multiprocessing detects dangling per test case (#2841)
e6aba06 
bpo-26762: test_multiprocessing now detects dangling processes and
threads per test case classes:

* setUpClass()/tearDownClass() of mixin classes now check if
  multiprocessing.process._dangling or threading._dangling was
  modified to detect "dangling" processses and threads.
* ManagerMixin.tearDownClass() now also emits a warning if it still
  has more than one active child process after 5 seconds.
* tearDownModule() now checks for dangling processes and threads
  before sleep 500 ms. And it now only sleeps if there is a least one
  dangling process or thread.
(cherry picked from commit ffb4940)
@vstinner
bpo-26762: test_multiprocessing close more queues (#2855)
7b5653f 
* Close explicitly queues to make sure that we don't leave dangling
  threads
* test_queue_in_process(): remove unused queue
* test_access() joins also the process to fix a random warning
(cherry picked from commit b4c5296)
@vstinner
bpo-31019: Fix multiprocessing.Process.is_alive() (#2875)
1bece56 
multiprocessing.Process.is_alive() now removes the process from the
_children set if the process completed.

The change prevents leaking "dangling" processes.
(cherry picked from commit 2db6482)
@vstinner vstinner changed the title bpo-26762, bpo-31019: Backport multiprocessing fixes from master to 3.6 [3.6] bpo-26762, bpo-31019: Backport multiprocessing fixes from master to 3.6 Jul 26, 2017
@vstinner vstinner merged commit d0adfb2 into python:3.6 Jul 26, 2017
@vstinner vstinner deleted the multiprocessing36 branch July 26, 2017 02:48
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