Issue #4106: Fix occasional exceptions printed out by multiprocessing on interpreter shutdown.
This bug doesn't seem to exist on 3.2, where daemon threads are killed
before Py_Finalize() is entered.
diff --git a/Lib/multiprocessing/queues.py b/Lib/multiprocessing/queues.py
index 8584408..b7eecef 100644
--- a/Lib/multiprocessing/queues.py
+++ b/Lib/multiprocessing/queues.py
@@ -188,13 +188,7 @@
debug('... done self._thread.start()')
# On process exit we will wait for data to be flushed to pipe.
- #
- # However, if this process created the queue then all
- # processes which use the queue will be descendants of this
- # process. Therefore waiting for the queue to be flushed
- # is pointless once all the child processes have been joined.
- created_by_this_process = (self._opid == os.getpid())
- if not self._joincancelled and not created_by_this_process:
+ if not self._joincancelled:
self._jointhread = Finalize(
self._thread, Queue._finalize_join,
[weakref.ref(self._thread)],
diff --git a/Misc/NEWS b/Misc/NEWS
index 4be510d..69e0ebc 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -40,6 +40,9 @@
Library
-------
+- Issue #4106: Fix occasional exceptions printed out by multiprocessing on
+ interpreter shutdown.
+
- Issue #11657: Fix sending file descriptors over 255 over a multiprocessing
Pipe.