[Dovecot] Defunct processes w/ v1.2.1

[Chris O'Regan]

On Tue, 2009-07-21 at 15:08 -0400, Timo Sirainen wrote:
> On Tue, 2009-07-21 at 14:45 -0400, Chris O'Regan wrote:
> > I have a v1.2.1 installed on my development box waiting for me to tinker
> > with the configuration. On several occasions, I have noticed that all
> > the dovecot processes are listed as "defunct". I don't recall seeing
> > anything significant in the logs the last time I checked. The system is
> > not under any load.
> 
> What exactly is "all"? Do you mean just dovecot-auth processes, or do
> you really mean everything, including imap-login, dovecot-auth, imap,
> pop3, ..?
> 
> If it's only dovecot-auth processes, it's probably a PAM issue. If it's
> more than dovecot-auth, is everything still anyway working?

It just happened again:

root      2904     1  0 14:32 ?        00:00:00 /local/bin/dovecot
root      2907  2904  0 14:32 ?        00:00:00 dovecot-auth
root      2919  2904  0 14:32 ?        00:00:00 dovecot-auth -w
dovecot   7026  2904  0 15:02 ?        00:00:00 [imap-login <defunct>]
[and many other imap-login processes, all defunct]

If I telnet to "imap", a connection is established but there is no
greeting. I get "connection refused" if I try to access "imaps" from
Thunderbird.

No errors in the logs, except for some messages that I believe are
related to an internal Nessus scan (repeated a few times):

Jul 21 15:01:45 XXX dovecot: imap-login: Disconnected (no auth attempts): rip=XXX.XXX.XXX.XXX, lip=XXX.XXX.XXX.XXX, TLS handshaking: Disconnected
Jul 21 15:02:20 XXX dovecot: imap-login: Disconnected (no auth attempts): rip=XXX.XXX.XXX.XXX, lip=XXX.XXX.XXX.XXX, TLS handshaking: SSL_accept() failed: error:1406B0CB:SSL routines:GET_CLIENT_MASTER_KEY:peer error no cipher

Hrmmm...look at the time of the imap-login process...that can't be a
coincidence. Nessus is scanning our production IMAP servers, too, but as
I mentioned, they are running an older version of Dovecot, namely
v1.1.14.


-- 
Chris O'Regan <chris at encs.concordia.ca>
Senior Unix Systems Administrator, Academic IT Services
Faculty of Engineering and Computer Science
Concordia University, Montreal, Canada