[issue45077] multiprocessing.Pool(64) crashes on Windows

Change by Dong-hee Na : -- nosy: +corona10 ___ Python tracker ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.pytho

[issue45077] multiprocessing.Pool(64) crashes on Windows

Eryk Sun added the comment: See bpo-26903 for a similar problem in concurrent.futures.ProcessPoolExecutor. It was resolved by adding a limit constant, _MAX_WINDOWS_WORKERS == 61. WaitForMultipleObjects() can wait on up to 64 object handles, but in this case 3 slots are already taken. The po

[issue45077] multiprocessing.Pool(64) crashes on Windows

Kagami Sascha Rosylight added the comment: The argument-less instantiation also fails, which is worse. ``` >>> multiprocessing.Pool() >>> Exception in thread Thread-1: Traceback (most recent call last): File "C:\Users\sasch\AppData\Local\Programs\Python\Python39\lib\threading.py", line 97

[issue45077] multiprocessing.Pool(64) crashes on Windows

New submission from Kagami Sascha Rosylight : Similar issue as the previous issue 26903. ``` Python 3.9.7 (tags/v3.9.7:1016ef3, Aug 30 2021, 20:19:38) [MSC v.1929 64 bit (AMD64)] on win32 Type "help", "copyright", "credits" or "license" for more information. >>> import multiprocessing >>> mult