New submission from Ron Serruya <ron.serr...@gmail.com>:
Sending Context.run to another process via ProccessPoolExecutor hangs forever: ``` from contextvars import ContextVar, copy_context from concurrent.futures import ProcessPoolExecutor from multiprocessing import Process var: ContextVar[int] = ContextVar('var',default=None) if __name__ == '__main__': # ***** This hangs forever ***** with ProcessPoolExecutor(max_workers=1) as pp: ctx = copy_context() pp.submit(ctx.run, list) # ****** This throws 'cannot pickle Context' # ***** This hangs forever ***** ctx = copy_context() p = Process(target=ctx.run, args=(list,)) p.start() p.join() ``` python version is 3.8.0 running on Mac OSX 10.15.1 ---------- messages: 359575 nosy: ronserruya priority: normal severity: normal status: open title: contextvars.Context.run hangs forever in ProccessPoolExecutor type: behavior versions: Python 3.8 _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue39257> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com