From: "Basil L. Contovounesios" <contovob@tcd.ie>
To: Michael Albinus <michael.albinus@gmx.de>
Cc: 33018@debbugs.gnu.org
Subject: bug#33018: 26.1.50; thread starvation with async processes and accept-process-output
Date: Tue, 16 Oct 2018 15:55:28 +0100 [thread overview]
Message-ID: <87r2gqvt3z.fsf@tcd.ie> (raw)
In-Reply-To: <87sh16ro91.fsf@gmx.de> (Michael Albinus's message of "Tue, 16 Oct 2018 15:54:02 +0200")
Michael Albinus <michael.albinus@gmx.de> writes:
> "Basil L. Contovounesios" <contovob@tcd.ie> writes:
>
>> There's something about going through a complete create-join cycle more
>> than once within a non-main-thread which is triggering this behaviour.
>
> I'm not sure that it is related to threads.
It has to be, because there is never an issue when I run the same
asynchronous wget processes without threads, and with threads the hang
reliably occurs 100% of the time.
> It looks, like some of your processes do not exit properly, and then
> thread-join is blocked.
Indeed, but there is something about the interaction of Emacs threads
and subprocesses which is causing unsuccessful process termination.
Note that I am not ruling out pilot error; I simply haven't debugged
this issue any deeper yet. The fact that no-one has yet pointed out any
obvious blunders on my part gives me more confidence that there is
indeed some ghost in the wire.
> I've modified your example, again. It runs perfectly.
Indeed, there are many subprocess-within-a-thread examples which don't
suffer from a hang, e.g. by using a different URL. I would like to get
to the bottom of why network programs like wget/curl in particular
eventually hang, though.
Thanks,
--
Basil
next prev parent reply other threads:[~2018-10-16 14:55 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-11 14:57 bug#33018: 26.1.50; thread starvation with async processes and accept-process-output Basil L. Contovounesios
2018-10-12 8:07 ` Eli Zaretskii
2018-10-14 15:00 ` Basil L. Contovounesios
2018-10-14 15:17 ` Eli Zaretskii
2018-10-14 15:36 ` Basil L. Contovounesios
2018-10-12 12:02 ` Michael Albinus
2018-10-12 12:43 ` Eli Zaretskii
2018-10-12 12:49 ` Michael Albinus
2018-10-14 15:17 ` Basil L. Contovounesios
2018-10-15 8:02 ` Michael Albinus
2018-10-16 1:15 ` Basil L. Contovounesios
2018-10-16 13:54 ` Michael Albinus
2018-10-16 14:55 ` Basil L. Contovounesios [this message]
2018-10-16 14:58 ` Eli Zaretskii
2018-10-17 17:37 ` Basil L. Contovounesios
2018-10-17 17:56 ` Eli Zaretskii
2018-10-17 18:05 ` Basil L. Contovounesios
2018-10-17 18:20 ` Eli Zaretskii
2018-10-17 18:25 ` Eli Zaretskii
2018-10-17 20:46 ` Basil L. Contovounesios
2018-10-20 8:34 ` Eli Zaretskii
2018-10-17 20:02 ` Basil L. Contovounesios
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