Delgan <delgan...@gmail.com> added the comment:
Thank you for having looked into the problem. To be more specific, I don't generally mix threads with multiprocessing, but it's a situation where there is one global and hidden consumer thread listening to a queue for non-blocking logging. Actually, I think the problem is reproducible using the QueueListener provided in "logging.handlers". The following snippet is inspired by this part of the documentation: https://docs.python.org/3/howto/logging-cookbook.html#dealing-with-handlers-that-block ---------------------- import logging import multiprocessing import queue from logging.handlers import QueueHandler, QueueListener if __name__ == "__main__": que = multiprocessing.Queue() queue_handler = QueueHandler(que) handler = logging.StreamHandler() listener = QueueListener(que, handler) root = logging.getLogger() root.addHandler(queue_handler) listener.start() for i in range(10000): root.warning('Look out!') p = multiprocessing.Process(target=lambda: None) p.start() p.join() print("Not hanging yet", i) listener.stop() ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue40399> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
