IMAP disconnecting

IMAP disconnecting

[Gour]

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Hello!

I run Emacs-CVS with included Gnus-5.13 which access my local dovecot
IMAP server.

This topic was already discussed, but I still do not have solutions for
regular disconnect from IMAP server.

Here you can see snippet from my today' log:


dovecot: 2008-08-20 07:53:50Info: imap-login: Login: user=<gour>,
method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, TLS
dovecot: 2008-08-20 07:56:28Info: imap-login: Disconnected: Inactivity: 
rip=127.0.0.1, lip=127.0.0.1, secured


It's quite frustrating to start writing email and then discover that you
cannot send it 3 minutes later cause Gnus lost connection :-/


Any idea how to investigate the problem deeper and/or any workaround?


Sincerely,
Gour

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Re: IMAP disconnecting

[Tassilo Horn]

Gour <gour@mail.inet.hr> writes:

Hi!

> I run Emacs-CVS with included Gnus-5.13 which access my local dovecot
> IMAP server.
>
> This topic was already discussed, but I still do not have solutions
> for regular disconnect from IMAP server.
>
> Here you can see snippet from my today' log:
>
> dovecot: 2008-08-20 07:53:50Info: imap-login: Login: user=<gour>,
> method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, TLS
> dovecot: 2008-08-20 07:56:28Info: imap-login: Disconnected: Inactivity: 
> rip=127.0.0.1, lip=127.0.0.1, secured

Maybe a problem with TLS?  I don't see a reason to use encrypted
connections to a local server, so try without that?

> It's quite frustrating to start writing email and then discover that you
> cannot send it 3 minutes later cause Gnus lost connection :-/

A quick google search showed that dovecot's rawlog utility might be
useful to find the problem.

  http://wiki.dovecot.org/Debugging/Rawlog

Bye,
Tassilo
-- 
      "DRM manages rights in the same way a jail manages freedom"

Re: IMAP disconnecting

[Gour]

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>>>>> "Tassilo" == Tassilo Horn <tassilo@member.fsf.org> writes:

Tassilo> Maybe a problem with TLS?  I don't see a reason to use
Tassilo> encrypted connections to a local server, so try without that?

Hmm...I use encrypted connections to be able to sync from my laptop with
offlineimap - that's why I use imap & imaps on the dovecot.

How would I force Gnus to connect via imap locally?

Tassilo> A quick google search showed that dovecot's rawlog utility
Tassilo> might be useful to find the problem.

Tassilo>   http://wiki.dovecot.org/Debugging/Rawlog

Thank you.

I enabled rawlog and will post if something interesting appears there.


Sincerely,
Gour


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Re: IMAP disconnecting

[Tassilo Horn]

Gour <gour@mail.inet.hr> writes:

Hi!

> Tassilo> Maybe a problem with TLS?  I don't see a reason to use
> Tassilo> encrypted connections to a local server, so try without that?
>
> Hmm...I use encrypted connections to be able to sync from my laptop
> with offlineimap - that's why I use imap & imaps on the dovecot.

Yeah, I use the same setup, but TLS only for synching with offlineimap.

> How would I force Gnus to connect via imap locally?

Set up your select methods like this.

--8<---------------cut here---------------start------------->8---
(add-to-list 'gnus-secondary-select-methods
             '(nnimap "Uni"
                      (nnimap-address "localhost")
                      (nnimap-stream network)
                      (nnimap-authenticator login)))
--8<---------------cut here---------------end--------------->8---

See (info "(gnus)IMAP") for the description.

Bye,
Tassilo
-- 
Richard Stallman gets 9 bits to the byte.

Re: IMAP disconnecting

[Gour]

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>>>>> "Tassilo" == Tassilo Horn <tassilo@member.fsf.org> writes:

Tassilo> Yeah, I use the same setup, but TLS only for synching with
Tassilo> offlineimap.

Cool.

Tassilo> Set up your select methods like this.

Tassilo> (add-to-list 'gnus-secondary-select-methods '(nnimap "Uni"
Tassilo> (nnimap-address "localhost") (nnimap-stream network)
Tassilo> (nnimap-authenticator login)))

Thank you very much.

Now, dovecot shows:

dovecot: 2008-08-20 16:23:23Info: imap-login: Login: user=<gour>,
method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, secured

This looks OK?

otoh, I've found some post (same/similar problem) suggesting to add:

(require 'gnus-demon)
(setq gnus-use-demon t)
(gnus-demon-add-handler 'gnus-group-get-new-news 10 0)
(gnus-demon-init)


What do you think about it?

Is it required?


Sincerely,
Gour


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Re: IMAP disconnecting

[Tassilo Horn]

Gour <gour@mail.inet.hr> writes:

Hi!

> Now, dovecot shows:
>
> dovecot: 2008-08-20 16:23:23Info: imap-login: Login: user=<gour>,
> method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, secured
>
> This looks OK?

Yes, looks good.

> otoh, I've found some post (same/similar problem) suggesting to add:
>
> (require 'gnus-demon)
> (setq gnus-use-demon t)
> (gnus-demon-add-handler 'gnus-group-get-new-news 10 0)
> (gnus-demon-init)
>
> What do you think about it?

This lets gnus check for new news every 10 minutes of emacs idle time
(or something like that).  This can repair disconnects if the server
closes the connection after a certain time of inactivity.

But on the net I've read that dovecot doesn't disconnect clients.  After
some time with no activity, it contacts the clients and checks if
they're still available.

> Is it required?

Normally, it shouldn't.  But give it a test ride...

Bye,
Tassilo

Re: IMAP disconnecting

[Gour]

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>>>>> "Tassilo" == Tassilo Horn <tassilo@member.fsf.org> writes:

Tassilo> Yes, looks good.

OK.

Tassilo> This lets gnus check for new news every 10 minutes of emacs
Tassilo> idle time (or something like that).  This can repair
Tassilo> disconnects if the server closes the connection after a certain
Tassilo> time of inactivity.

Tassilo> But on the net I've read that dovecot doesn't disconnect
Tassilo> clients.  After some time with no activity, it contacts the
Tassilo> clients and checks if they're still available.

Interesting.

Tassilo> Normally, it shouldn't.  But give it a test ride...

OK. Wil follow up if required.


Sincerely,
Gour


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Re: IMAP disconnecting

[David]

Tassilo Horn <tassilo@member.fsf.org> writes:
> But on the net I've read that dovecot doesn't disconnect clients.  After
> some time with no activity, it contacts the clients and checks if
> they're still available.

Really? I frequently get disconnected after 30 minutes of idle
time. It's hardcoded in the source (imap-login/client.c):

/* Disconnect client after idling this many milliseconds */
#define CLIENT_LOGIN_IDLE_TIMEOUT_MSECS (3*60*1000)

However, this shouldn't cause any problems with Gnus. The server should
simply get reopened when you enter or check a nnimap group.

-David

Re: IMAP disconnecting

[Tassilo Horn]

David <de_bb@arcor.de> writes:

Hi David,

>> But on the net I've read that dovecot doesn't disconnect clients.  After
>> some time with no activity, it contacts the clients and checks if
>> they're still available.
>
> Really? I frequently get disconnected after 30 minutes of idle
> time. It's hardcoded in the source (imap-login/client.c):
>
> /* Disconnect client after idling this many milliseconds */
> #define CLIENT_LOGIN_IDLE_TIMEOUT_MSECS (3*60*1000)

Indeed, I have misread something I've found on the net. ;-)

Bye,
Tassilo

Re: IMAP disconnecting

[David Kastrup]

Gour <gour@mail.inet.hr> writes:

> Hello!
>
> I run Emacs-CVS with included Gnus-5.13 which access my local dovecot
> IMAP server.
>
> This topic was already discussed, but I still do not have solutions for
> regular disconnect from IMAP server.
>
> Here you can see snippet from my today' log:
>
>
> dovecot: 2008-08-20 07:53:50Info: imap-login: Login: user=<gour>,
> method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, TLS
> dovecot: 2008-08-20 07:56:28Info: imap-login: Disconnected: Inactivity: 
> rip=127.0.0.1, lip=127.0.0.1, secured
>
>
> It's quite frustrating to start writing email and then discover that you
> cannot send it 3 minutes later cause Gnus lost connection :-/

Goto the *Group* buffer, type ^, go to the line with your server, type C
(possibly followed with C-g if it hangs) and O.  Now go back to your
mail buffer and send.

-- 
David Kastrup, Kriemhildstr. 15, 44793 Bochum

Re: IMAP disconnecting

[Gour]

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>>>>> "David" == David Kastrup <dak@gnu.org> writes:

David> Goto the *Group* buffer, type ^, go to the line with your server,
David> type C (possibly followed with C-g if it hangs) and O.  Now go
David> back to your mail buffer and send.

Heh, nice 'workaround' ;)

Still, I prefer fully working solution and it looks that Tassilo's
suggestion of disabling TLS is working...


Sincerely,
Gour


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