Re: Futex hang when running event loop on a separated thread

From	Zachary Ware <zachary.ware+pylist@gmail.com>
Newsgroups	comp.lang.python
Subject	Re: Futex hang when running event loop on a separated thread
Date	2015-11-24 13:41 -0600
Message-ID	<mailman.30.1448394133.20593.python-list@python.org> (permalink)
References	<CA+DCN_s77howCh5ptdGwtsF9Z3-r0nRhu-q2t43jdXKTdqSMGw@mail.gmail.com> <CA+DCN_vp8nFS-gOrQMYYefhVt2W0oAP+rFcKQbQ7K+hOHwvuuQ@mail.gmail.com> <CAKJDb-MY9W518kKhFf8vbZAfFad=uGXefDePf1KLpUJV9H3Rpg@mail.gmail.com> <CA+DCN_uC2k=rJxmtfEideAhGj1=2XVq8VHGU=OUkB9yHxV7bPw@mail.gmail.com>

Show all headers | View raw

On Tue, Nov 24, 2015 at 12:37 PM, Marc Aymerich <glicerinu@gmail.com> wrote:
> still it appears to work only if the main thread is in the foreground
> (as of calling Thread() with deamon=True), I don't get why it behaves
> differently :( maybe it is waiting for other stuff, but no idea how to
> confirm this with strace of other means.. i always see the same
> 'futex(0x7f9a70000c10, FUTEX_WAIT_PRIVATE, 0, NULL'

What's your exact version of Python?  asyncio is still evolving
rapidly, and may behave differently between patch releases (say,
between 3.4.1 and 3.4.3).

I have tried out your reproducer with my fix, and I can't provoke a
hang using Python 3.4.3 on either OSX or Ubuntu Trusty.  Can you give
some more specific directions to reproduce?

-- 
Zach

Back to comp.lang.python | Previous | Next | Find similar | Unroll thread

Thread

Re: Futex hang when running event loop on a separated thread Zachary Ware <zachary.ware+pylist@gmail.com> - 2015-11-24 13:41 -0600

csiph-web