Michael Goldish added the comment: > Sorry, you're wrong: the proactor event loop heavily uses the _overlapped > module which is implemented in C. A crash in the garbage collector is more > likely a bug in asyncio/your application, than a bug in Python itself.
I'm aware of that. I assumed the original crash reported in this thread was the same as mine but I can't be sure of that. And that crash was on Linux, where asyncio is pure Python AFAIK. > Please enable asyncio debug mode, ResourceWarning, enable DEBUG log level, > and check if you get some errors. For example, "GetQueuedCompletionStatus() > returned an unexpected event" usually means that you will quickly get a > memory corruption... I've already done that but admittedly not for very long because the server ran so slowly that it was unresponsive. I didn't see any error or warning messages, but I did see numerous "Executing <Handle _ProactorReadPipeTransport._loop_reading(<_OverlappedF...events.py:451>)" messages. > Would it be possible to test again with fewer clients (500 clients or less to > not hit the select() limit on Windows) with selector event loop? I'll see if I can try that, but I guess reproducing the crash can take much longer with 500 clients. > Can you check if asyncio.windows_events._BaseWaitHandleFuture is used? This > class is used by IocpProactor.wait_for_handle() which is called by > _WindowsSubprocessTransport. But you wrote you the server (where the crash > occurs) doesn't run subprocesses. It's not used. I put print statements and an exit() in the constructor of _BaseWaitHandleFuture and it wasn't triggered. > Are you using asyncio code outside the main thread? No. > asyncio is not thread-safe at all :-p Are you using a single event loop or > one event loop per thread? A single event loop, and I've made sure that all code running outside the main thread doesn't call any asyncio functions. ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue23187> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
