Issue #15101: Make pool finalizer avoid joining current thread
diff --git a/Lib/multiprocessing/pool.py b/Lib/multiprocessing/pool.py
index 170aa7f..00c904a 100644
--- a/Lib/multiprocessing/pool.py
+++ b/Lib/multiprocessing/pool.py
@@ -489,7 +489,8 @@
# We must wait for the worker handler to exit before terminating
# workers because we don't want workers to be restarted behind our back.
debug('joining worker handler')
- worker_handler.join()
+ if threading.current_thread() is not worker_handler:
+ worker_handler.join(1e100)
# Terminate workers which haven't already finished.
if pool and hasattr(pool[0], 'terminate'):
@@ -499,10 +500,12 @@
p.terminate()
debug('joining task handler')
- task_handler.join(1e100)
+ if threading.current_thread() is not task_handler:
+ task_handler.join(1e100)
debug('joining result handler')
- result_handler.join(1e100)
+ if threading.current_thread() is not result_handler:
+ result_handler.join(1e100)
if pool and hasattr(pool[0], 'terminate'):
debug('joining pool workers')
diff --git a/Misc/NEWS b/Misc/NEWS
index a11c488..11fb95f 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -67,6 +67,8 @@
Library
-------
+- Issue #15101: Make pool finalizer avoid joining current thread.
+
- Issue #15054: A bug in tokenize.tokenize that caused string literals
with 'b' and 'br' prefixes to be incorrectly tokenized has been fixed.
Patch by Serhiy Storchaka.