New submission from Carlton Gibson <carlton.gib...@noumenal.es>:
6ea29c5e90dde6c240bd8e0815614b52ac307ea1 for https://bugs.python.org/issue34687 "Make asynico use ProactorEventLoop by default" This introducesd a regression in asgiref, and hence Django 3.0.x. https://github.com/django/asgiref/issues/132 https://code.djangoproject.com/ticket/30900 The error from the asgiref issue is clearest: ``` asgiref\sync.py:97: in __call__ loop_future.result() ..\..\..\AppData\Local\Programs\Python\Python38\lib\concurrent\futures\_base.py:432: in result return self.__get_result() ..\..\..\AppData\Local\Programs\Python\Python38\lib\concurrent\futures\_base.py:388: in __get_result raise self._exception ..\..\..\AppData\Local\Programs\Python\Python38\lib\concurrent\futures\thread.py:57: in run result = self.fn(*self.args, **self.kwargs) asgiref\sync.py:130: in _run_event_loop loop.close() _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ self = <ProactorEventLoop running=False closed=False debug=False> def close(self): if self.is_running(): raise RuntimeError("Cannot close a running event loop") if self.is_closed(): return > signal.set_wakeup_fd(-1) E ValueError: set_wakeup_fd only works in main thread ``` Off the main thread, we use a ThreadPoolExecutor and wait for the future to finish. It looks as if `ProactorEventLoop` needs to check the current thread before triggering the signal in close(). ---------- components: asyncio messages: 355214 nosy: asvetlov, carltongibson, yselivanov priority: normal severity: normal status: open title: Asyncio regression on Windows with Python 3.8 type: crash versions: Python 3.8 _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue38563> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
