New submission from Damien Levac <damien.le...@gmail.com>:
When running tasks on a `ProcessPoolExecutor`, exceptions raised by the dispatched function should be pickled and accessible to the parent process through the `Future.exception` method. On Python 3.9.1 (Linux ryzen3950x 5.4.0-58-generic #64-Ubuntu SMP Wed Dec 9 08:16:25 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux) the behavior works with exceptions which are stateless but not if they hold state. I suspect it is related to the multiprocessing/pickle bug mentioned in the release notes to 3.9.1 but I didn't dig much deeper. Let me know if I can assist in any way or if any pertinent information is missing: it is my first time reporting a bug here :) Thank you for your hard work! ---------- components: Library (Lib) files: repro.py messages: 383903 nosy: damien.levac priority: normal severity: normal status: open title: concurrent.futures.ProcessPoolExecutor is unable to forward exceptions with state. type: behavior versions: Python 3.9 Added file: https://bugs.python.org/file49703/repro.py _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue42769> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
