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Re: emacs hangs when changing network while sleeping

From: joakim
Subject: Re: emacs hangs when changing network while sleeping
Date: Mon, 24 Jan 2011 21:44:14 +0100
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.0.50 (gnu/linux)

Ted Zlatanov <address@hidden> writes:

> On Mon, 24 Jan 2011 13:42:29 +0100 address@hidden wrote: 
> j> Stefan Monnier <address@hidden> writes:
>>>> This happens for me too. I have the following workaround script.
>>>> Basically it finds the ip of an open nntp session that is hanging due to
>>>> local interface change, and makes a dummy lookalike interface on the
>>>> loopback interface. Emacs is then able to determine that the interface
>>>> is dead and can recover. 
>>>> #/bin/sh
>>>> `lsof -n|grep emacs|grep nntp|sed "s/.*TCP\ 
>>>> \\([^:]*\\):.*->\\([^:].*\\):.*/
>>>> export a=\\1 export b=\\2/"`
>>>> echo $a $b
>>>> ifconfig lo:1 $a
>>>> ifconfig lo:2 $b
>>>> echo press enter when emacs is alive
>>>> read
>>>> ifconfig lo:1 down
>>>> ifconfig lo:2 down
>>> Could someone take it up to the gnutls guys to try and figure out what's
>>> going on?
> j> In my case I dont think gnutls is involved since I only have an
> j> unencrypted connection to gmane.
> Is there a way to test this without a laptop?

There is nothing laptop specific about the bug.

Its not gnus specific either. Its just that gnus keeps a connection
open. To recreate, keep a connection open, bring down the interface and
try to read something from the connection. Emacs will hang.

> I'd rather not make it a GnuTLS issue if it happens with unencrypted
> connections as well.
> Ted

Joakim Verona

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