https://github.com/python/cpython/commit/3dd3675492a3fc3b7996613ef75a9044ee7449b0
commit: 3dd3675492a3fc3b7996613ef75a9044ee7449b0
branch: main
author: Victor Stinner <vstin...@python.org>
committer: vstinner <vstin...@python.org>
date: 2025-03-04T17:05:20Z
summary:
gh-130730: Fix multiprocessing test_active_children() (#130837)
Replace a sleep with an event: sleep is not a reliable
synchronization primitive.
files:
M Lib/test/_test_multiprocessing.py
diff --git a/Lib/test/_test_multiprocessing.py
b/Lib/test/_test_multiprocessing.py
index f31151e53c4bb0..67ab8f098f700b 100644
--- a/Lib/test/_test_multiprocessing.py
+++ b/Lib/test/_test_multiprocessing.py
@@ -589,12 +589,16 @@ def test_cpu_count(self):
def test_active_children(self):
self.assertEqual(type(self.active_children()), list)
- p = self.Process(target=time.sleep, args=(DELTA,))
+ event = self.Event()
+ p = self.Process(target=event.wait, args=())
self.assertNotIn(p, self.active_children())
- p.daemon = True
- p.start()
- self.assertIn(p, self.active_children())
+ try:
+ p.daemon = True
+ p.start()
+ self.assertIn(p, self.active_children())
+ finally:
+ event.set()
p.join()
self.assertNotIn(p, self.active_children())
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