From: Yuri D'Elia <wavexx@thregr.org>
To: emacs-devel@gnu.org
Cc: 20015@debbugs.gnu.org
Subject: tramp ControlMaster options (was: Re: package.el: what does package "Checking ... " actually do?)
Date: Sat, 18 Jul 2015 14:44:11 +0200 [thread overview]
Message-ID: <55AA4A1B.2010406@thregr.org> (raw)
In-Reply-To: <modctv$94a$1@ger.gmane.org>
On 18/07/15 13:22, Yuri D'Elia wrote:
> On 17/07/15 13:11, Yuri D'Elia wrote:
>> When I'm using a high-latency network connection, and I update some
>> packages, downloading takes a few seconds after the connection is
>> initiated, but package "Checking" instead takes literally minutes to
>> complete.
>
> Turns out, it's another case of:
>
> https://debbugs.gnu.org/cgi/bugreport.cgi?bug=20015
It's really that bad. Even bringing out the variable description of
tramp-ssh-controlmaster-options hangs.
The issue is caused by a rogue provider's DNS server responding with
NXDOMAIN but valid IN A record, which ssh still tries to connect to. And
since the host is filtered, this takes minutes to time out.
Considering that I have a global setting in my ~/.ssh/config that
enables ControlMaster/ControlPath globally, I consider this as a regression.
I tried the same probes using:
ssh -o BatchMode=yes [various flags] 0.0.0.0
and I get comparable output, and there's no chance 0.0.0.0 would be a
valid address.
next prev parent reply other threads:[~2015-07-18 12:44 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-17 11:11 package.el: what does package "Checking ... " actually do? Yuri D'Elia
2015-07-17 12:36 ` Artur Malabarba
2015-07-17 13:19 ` Artur Malabarba
2015-07-18 11:22 ` Yuri D'Elia
2015-07-18 12:44 ` Yuri D'Elia [this message]
[not found] ` <55AA4AF3.2030901@thregr.org>
2015-07-20 5:38 ` tramp ControlMaster options Michael Albinus
2015-07-20 6:21 ` Thierry Volpiatto
2015-07-20 8:07 ` Yuri D'Elia
2015-07-20 18:43 ` Michael Albinus
2015-07-20 20:41 ` Yuri D'Elia
2015-07-21 5:09 ` Thierry Volpiatto
2015-07-21 5:53 ` Michael Albinus
2015-07-21 7:22 ` Thierry Volpiatto
2015-07-21 10:59 ` Yuri D'Elia
2015-07-22 5:58 ` Michael Albinus
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