GNU bug report logs - #19729
25.0.50; url-retrieve-synchronously never returns when there's no response from the server

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Package: emacs;

Reported by: Dmitry Gutov <dgutov <at> yandex.ru>

Date: Thu, 29 Jan 2015 21:12:02 UTC

Severity: normal

Merged with 20207

Found in version 25.0.50

Done: Dmitry Gutov <dgutov <at> yandex.ru>

Bug is archived. No further changes may be made.

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Report forwarded to bug-gnu-emacs <at> gnu.org:
bug#19729; Package emacs. (Thu, 29 Jan 2015 21:12:02 GMT) Full text and rfc822 format available.
Acknowledgement sent to Dmitry Gutov <dgutov <at> yandex.ru>:
New bug report received and forwarded. Copy sent to bug-gnu-emacs <at> gnu.org. (Thu, 29 Jan 2015 21:12:02 GMT) Full text and rfc822 format available.

Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Dmitry Gutov <dgutov <at> yandex.ru>
To: bug-gnu-emacs <at> gnu.org
Subject: 25.0.50;
 url-retrieve-synchronously never returns when there's no response
 from the server
Date: Thu, 29 Jan 2015 23:11:16 +0200

Evaluate

(url-retrieve-synchronously "http://localhost:3333/foo")

As long as there's nothing running on that port, the function call
should return quickly, but it never completes.

On emacs-24, it works as expected.

In GNU Emacs 25.0.50.9 (x86_64-unknown-linux-gnu, GTK+ Version 3.12.2)
 of 2015-01-29 on axl
Repository revision: 1dc1959ebf50401c69adeb6d182950b59835f94d
Windowing system distributor `The X.Org Foundation', version 11.0.11601901
System Description:	Ubuntu 14.10
Information forwarded to bug-gnu-emacs <at> gnu.org:
bug#19729; Package emacs. (Thu, 29 Jan 2015 22:24:02 GMT) Full text and rfc822 format available.

Message #8 received at 19729 <at> debbugs.gnu.org (full text, mbox):

From: Andreas Schwab <schwab <at> linux-m68k.org>
To: Dmitry Gutov <dgutov <at> yandex.ru>
Cc: 19729 <at> debbugs.gnu.org
Subject: Re: bug#19729: 25.0.50;
 url-retrieve-synchronously never returns when there's no response
 from the server
Date: Thu, 29 Jan 2015 23:23:25 +0100

Dmitry Gutov <dgutov <at> yandex.ru> writes:

> Evaluate
>
> (url-retrieve-synchronously "http://localhost:3333/foo")
>
> As long as there's nothing running on that port, the function call
> should return quickly, but it never completes.

If nothing answers then it will wait until TCP timeout.

Andreas.

-- 
Andreas Schwab, schwab <at> linux-m68k.org
GPG Key fingerprint = 58CA 54C7 6D53 942B 1756  01D3 44D5 214B 8276 4ED5
"And now for something completely different."
Information forwarded to bug-gnu-emacs <at> gnu.org:
bug#19729; Package emacs. (Thu, 29 Jan 2015 22:25:01 GMT) Full text and rfc822 format available.

Message #11 received at 19729 <at> debbugs.gnu.org (full text, mbox):

From: Dmitry Gutov <dgutov <at> yandex.ru>
To: Andreas Schwab <schwab <at> linux-m68k.org>
Cc: 19729 <at> debbugs.gnu.org
Subject: Re: bug#19729: 25.0.50; url-retrieve-synchronously never
 returns when there's no response from the server
Date: Fri, 30 Jan 2015 00:24:42 +0200

On 01/30/2015 12:23 AM, Andreas Schwab wrote:
> If nothing answers then it will wait until TCP timeout.

Does "never completes" sound like honouring TCP timeout to you?
Information forwarded to bug-gnu-emacs <at> gnu.org:
bug#19729; Package emacs. (Thu, 29 Jan 2015 22:27:02 GMT) Full text and rfc822 format available.

Message #14 received at 19729 <at> debbugs.gnu.org (full text, mbox):

From: Dmitry Gutov <dgutov <at> yandex.ru>
To: Andreas Schwab <schwab <at> linux-m68k.org>
Cc: 19729 <at> debbugs.gnu.org
Subject: Re: bug#19729: 25.0.50; url-retrieve-synchronously never
 returns when there's no response from the server
Date: Fri, 30 Jan 2015 00:25:59 +0200

On 01/30/2015 12:23 AM, Andreas Schwab wrote:

> If nothing answers then it will wait until TCP timeout.

But actually, the port is closed, so it should finish immediately with 
"connection refused".
Information forwarded to bug-gnu-emacs <at> gnu.org:
bug#19729; Package emacs. (Fri, 30 Jan 2015 10:23:01 GMT) Full text and rfc822 format available.

Message #17 received at 19729 <at> debbugs.gnu.org (full text, mbox):

From: Andreas Schwab <schwab <at> linux-m68k.org>
To: Dmitry Gutov <dgutov <at> yandex.ru>
Cc: 19729 <at> debbugs.gnu.org
Subject: Re: bug#19729: 25.0.50;
 url-retrieve-synchronously never returns when there's no response
 from the server
Date: Fri, 30 Jan 2015 11:22:32 +0100

Dmitry Gutov <dgutov <at> yandex.ru> writes:

> On 01/30/2015 12:23 AM, Andreas Schwab wrote:
>
>> If nothing answers then it will wait until TCP timeout.
>
> But actually, the port is closed, so it should finish immediately with
> "connection refused".

Depends on the firewall settings.

Andreas.

-- 
Andreas Schwab, schwab <at> linux-m68k.org
GPG Key fingerprint = 58CA 54C7 6D53 942B 1756  01D3 44D5 214B 8276 4ED5
"And now for something completely different."
Information forwarded to bug-gnu-emacs <at> gnu.org:
bug#19729; Package emacs. (Fri, 30 Jan 2015 10:41:02 GMT) Full text and rfc822 format available.

Message #20 received at 19729 <at> debbugs.gnu.org (full text, mbox):

From: Andreas Schwab <schwab <at> linux-m68k.org>
To: Dmitry Gutov <dgutov <at> yandex.ru>
Cc: 19729 <at> debbugs.gnu.org
Subject: Re: bug#19729: 25.0.50;
 url-retrieve-synchronously never returns when there's no response
 from the server
Date: Fri, 30 Jan 2015 11:39:53 +0100

Dmitry Gutov <dgutov <at> yandex.ru> writes:

> On 01/30/2015 12:23 AM, Andreas Schwab wrote:
>> If nothing answers then it will wait until TCP timeout.
>
> Does "never completes" sound like honouring TCP timeout to you?

You didn't say how long "never" is.

Andreas.

-- 
Andreas Schwab, schwab <at> linux-m68k.org
GPG Key fingerprint = 58CA 54C7 6D53 942B 1756  01D3 44D5 214B 8276 4ED5
"And now for something completely different."
Information forwarded to bug-gnu-emacs <at> gnu.org:
bug#19729; Package emacs. (Fri, 30 Jan 2015 10:42:01 GMT) Full text and rfc822 format available.

Message #23 received at 19729 <at> debbugs.gnu.org (full text, mbox):

From: Dmitry Gutov <dgutov <at> yandex.ru>
To: Andreas Schwab <schwab <at> linux-m68k.org>
Cc: 19729 <at> debbugs.gnu.org
Subject: Re: bug#19729: 25.0.50; url-retrieve-synchronously never
 returns when there's no response from the server
Date: Fri, 30 Jan 2015 12:41:42 +0200

On 01/30/2015 12:22 PM, Andreas Schwab wrote:
> Depends on the firewall settings.

Nothing above the default Ubuntu settings. Like I said, emacs-24 works 
like expected.

Have you tried my example? Can you see the difference in behavior?
Information forwarded to bug-gnu-emacs <at> gnu.org:
bug#19729; Package emacs. (Fri, 30 Jan 2015 10:44:01 GMT) Full text and rfc822 format available.

Message #26 received at 19729 <at> debbugs.gnu.org (full text, mbox):

From: Dmitry Gutov <dgutov <at> yandex.ru>
To: Andreas Schwab <schwab <at> linux-m68k.org>
Cc: 19729 <at> debbugs.gnu.org
Subject: Re: bug#19729: 25.0.50; url-retrieve-synchronously never
 returns when there's no response from the server
Date: Fri, 30 Jan 2015 12:43:32 +0200

On 01/30/2015 12:39 PM, Andreas Schwab wrote:
> You didn't say how long "never" is.

Never is never. How long would you have me wait?
Information forwarded to bug-gnu-emacs <at> gnu.org:
bug#19729; Package emacs. (Fri, 30 Jan 2015 14:16:02 GMT) Full text and rfc822 format available.

Message #29 received at 19729 <at> debbugs.gnu.org (full text, mbox):

From: Andreas Schwab <schwab <at> linux-m68k.org>
To: Dmitry Gutov <dgutov <at> yandex.ru>
Cc: 19729 <at> debbugs.gnu.org
Subject: Re: bug#19729: 25.0.50;
 url-retrieve-synchronously never returns when there's no response
 from the server
Date: Fri, 30 Jan 2015 15:15:11 +0100

Dmitry Gutov <dgutov <at> yandex.ru> writes:

> On 01/30/2015 12:39 PM, Andreas Schwab wrote:
>> You didn't say how long "never" is.
>
> Never is never.

Never hasn't ended yet.

Andreas.

-- 
Andreas Schwab, schwab <at> linux-m68k.org
GPG Key fingerprint = 58CA 54C7 6D53 942B 1756  01D3 44D5 214B 8276 4ED5
"And now for something completely different."
Merged 19729 20207. Request was from Eli Zaretskii <eliz <at> gnu.org> to control <at> debbugs.gnu.org. (Sat, 18 Apr 2015 16:30:05 GMT) Full text and rfc822 format available.
Reply sent to Dmitry Gutov <dgutov <at> yandex.ru>:
You have taken responsibility. (Sun, 26 Apr 2015 15:24:02 GMT) Full text and rfc822 format available.
Notification sent to Dmitry Gutov <dgutov <at> yandex.ru>:
bug acknowledged by developer. (Sun, 26 Apr 2015 15:24:02 GMT) Full text and rfc822 format available.

Message #36 received at 19729-done <at> debbugs.gnu.org (full text, mbox):

From: Dmitry Gutov <dgutov <at> yandex.ru>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: eggert <at> cs.ucla.edu, 19729-done <at> debbugs.gnu.org
Subject: Re: bug#19860: 25.0.50; One url-retrieve-synchronously call
 running concurrently with another can freeze it
Date: Sun, 26 Apr 2015 18:23:37 +0300

On 04/26/2015 06:01 PM, Eli Zaretskii wrote:

> It looks like this also fixed bug#20207 and #19729, so I think we can
> close them.  Dmitry, can you verify that they are solved for you as
> well?

Indeed, they are. Thanks for the reminder.
Reply sent to Dmitry Gutov <dgutov <at> yandex.ru>:
You have taken responsibility. (Sun, 26 Apr 2015 15:24:02 GMT) Full text and rfc822 format available.
Notification sent to Eli Zaretskii <eliz <at> gnu.org>:
bug acknowledged by developer. (Sun, 26 Apr 2015 15:24:03 GMT) Full text and rfc822 format available.
bug archived. Request was from Debbugs Internal Request <help-debbugs <at> gnu.org> to internal_control <at> debbugs.gnu.org. (Mon, 25 May 2015 11:24:07 GMT) Full text and rfc822 format available.
This bug report was last modified 10 years and 31 days ago.

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