[2.7] bpo-30414: multiprocessing.Queue._feed do not break from main loop on exc (GH-1683) (#1817)
* bpo-30414: multiprocesing.Queue._feed do not break from main loop on exc
Queue background running thread was not handling exceptions correctly.
Any exception occurred inside thread (putting unpickable object) cause
feeder to finish running. After that every message put into queue is
silently ignored.
* bpo-30414: multiprocesing.Queue._feed do not break from main loop on exc
Queue background running thread was not handling exceptions correctly.
Any exception occurred inside thread (putting unpickable object) cause
feeder to finish running. After that every message put into queue is
silently ignored..
(cherry picked from commit bc50f03db4f58c869b78e98468e374d7e61f1227)
diff --git a/Lib/test/test_multiprocessing.py b/Lib/test/test_multiprocessing.py
index 4d39501..8a6bb78 100644
--- a/Lib/test/test_multiprocessing.py
+++ b/Lib/test/test_multiprocessing.py
@@ -641,6 +641,21 @@
self.fail("Probable regression on import lock contention;"
" see Issue #22853")
+ def test_queue_feeder_donot_stop_onexc(self):
+ # bpo-30414: verify feeder handles exceptions correctly
+ if self.TYPE != 'processes':
+ self.skipTest('test not appropriate for {}'.format(self.TYPE))
+
+ class NotSerializable(object):
+ def __reduce__(self):
+ raise AttributeError
+ with test.support.captured_stderr():
+ q = self.Queue()
+ q.put(NotSerializable())
+ q.put(True)
+ self.assertTrue(q.get(timeout=0.1))
+
+
#
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#