dovecot - Sep 2010 - Dovecot 2.0.2 breakes LMTP delivery for me

Hi,

I'm onboard Debian Lenny (amd64) and just reverted from 2.0.2-0~auto+4 back
to 2.0.1-0~auto+1 because LMTP stopped working completly with the above
Package.

In my setup delivery is done from exim via LMTP to dovecot (Maildir/ext3).
The lmtp dovecot config looks like this:
> service lmtp {
>   user = vmail
>   inet_listener lmtp {
>     address = 127.0.0.1
>     port = 24
>   }
> 
>   unix_listener lmtp {
>   }
> }
> protocol lmtp {
>   hostname = [...].de
>   mail_plugins = sieve quota listescape
>   postmaster_address = postmaster@[...].de
> }
With the new version I get no LMTP log message at all from dovecot and Exim
fails with:
> LMTP timeout after initial connection
When I do "/etc/init.d/dovecot stop" some process remain alive and I
ultimately have to SIGKILL the lmtp process to get rid of it.
> trench:/tmp# ps auwx |grep dovecot
> root      2643  0.0  0.0   8224   768 pts/1    R+   22:50   0:00 grep
dovecot
> root     31778  0.0  0.0  12384   684 pts/2    S+   22:36   0:00 tail -f
> /var/log/mail/dovecot.log
> dovecot  32368  0.0  0.0  12656   996 ?        S    22:40   0:00
dovecot/anvil
> root     32369  0.0  0.0  12788  1124 ?        S    22:40   0:00
dovecot/log
> root     32371  0.0  0.0  20148  4404 ?        S    22:40   0:00
> dovecot/config
> vmail    32764 99.9  0.0  36400  2612 ?        R    22:40  10:08
dovecot/lmtp
> trench:/tmp# kill 32368
> trench:/tmp# kill 32369
> trench:/tmp# ps auwx |grep dovecot
> root      2689  0.0  0.0   8224   768 pts/1    R+   22:50   0:00 grep
dovecot
> root     31778  0.0  0.0  12384   684 pts/2    S+   22:36   0:00 tail -f
> /var/log/mail/dovecot.log
> root     32371  0.0  0.0  20148  4404 ?        S    22:40   0:00
> dovecot/config
> vmail    32764 99.8  0.0  36400  2612 ?        R    22:40  10:20
dovecot/lmtp
> trench:/tmp# ps auwx |grep dovecot
> root      2692  0.0  0.0   8224   764 pts/1    R+   22:50   0:00 grep
dovecot
> root     31778  0.0  0.0  12384   684 pts/2    S+   22:36   0:00 tail -f
> /var/log/mail/dovecot.log
> root     32371  0.0  0.0  20148  4404 ?        S    22:40   0:00
> dovecot/config
> vmail    32764 99.9  0.0  36400  2612 ?        R    22:40  10:28
dovecot/lmtp
> trench:/tmp# kill 32764
> trench:/tmp# ps auwx |grep dovecot
> root      2700  0.0  0.0   8224   768 pts/1    R+   22:50   0:00 grep
dovecot
> root     31778  0.0  0.0  12384   684 pts/2    S+   22:36   0:00 tail -f
> /var/log/mail/dovecot.log
> root     32371  0.0  0.0  20148  4404 ?        S    22:40   0:00
> dovecot/config
> vmail    32764 99.9  0.0  36400  2612 ?        R    22:40  10:41
dovecot/lmtp
> trench:/tmp# kill -9 32764
> trench:/tmp# ps auwx |grep dovecot
> root      2830  0.0  0.0   8224   768 pts/1    R+   22:51   0:00 grep
dovecot
> root     31778  0.0  0.0  12384   684 pts/2    S+   22:36   0:00 tail -f
> /var/log/mail/dovecot.log
The older version works without any problems for me.

Any ideas whats the Problem?
Could there be a regression from the LMTP fixes introduced in 2.0.2?

Cheers,
Fabian Ruff

On Thu, 2010-09-09 at 22:15 +0000, Fabian Ruff wrote:
> > vmail    32764 99.9  0.0  36400  2612 ?        R    22:40  10:08
dovecot/lmtp
It's looping somewhere forever. It would be useful to know where. Could
you try upgrading again and when it gets back to looping forever, show
the results of:

strace -tt -p `pidof lmtp`

Does it print anything? If it does, show the first 20 lines or
something.

Also, and probably more importantly:

gdb -p `pidof lmtp`
bt full

Unfortunately your binaries are probably stripped so it probably shows
only function names, but that's better than nothing.
> Could there be a regression from the LMTP fixes introduced in 2.0.2?
There is only a single LMTP related change in v2.0.2, and I doubt that's
the cause: http://hg.dovecot.org/dovecot-2.0/rev/7fef89fea00e