On Sun, May 30, 2004 at 12:42:21AM +0300, Timo Sirainen wrote:

On Sat, 2004-05-29 at 09:00, Daniel wrote:

...

I running dovecot that is packaged with Fedora 1 with about 1500 email accounts approximately 5k messages per day. I have had to restart dovecot twice over a period of about 3 months due to it not responding. Overall I'm happy with the setup, however would I see and improvement if I upgraded to the latest version, at time of writing 0.99.10.5.

0.99.10.5 fixes several real problems, although they didn't happen very often with most people. See http://dovecot.org/list/dovecot/2004-May/003495.html

Timo, I have the same problem with dovecot, I have to restart it sometimes, mostly each week or so. I'm using a script to automaticaly check if dovecot is responding and restart it if not, is there any information I could let the script grab from the system to help you fixing this problem?

best regards/Mit freundlichen Grüßen Jens Gutzeit

On Wed, Jun 02, 2004 at 06:47:07PM +0300, Timo Sirainen wrote:

What exactly does "isn't responding" mean? Does it accept a TCP connection? Does it send "Dovecot ready" message? Or doesn't it just authenticate? What operating system is this?

It accepts a TCP connection, no timeout on the socket, but there is no "Dovecot ready" message. Load is always just fine and there are not so much processes from dovecot running, so, it's probably not a reached user limit.

And when it's stuck:

Is there anything in logs? Can you list the used file descriptors by dovecot master process? What about getting a strace of the dovecot process? Or if it's auth problem, those things for dovecot-auth process. Do imap-login processes exist? What about straceing them?

There is nothing in the logs. I'll change my script to mail me a dir listing of /proc/$dovecot_pid/fd, a ps output with all dovecot processes and a strace of the dovecot process. I'll report this to you next time we have the problem.

System is Linux 2.6 (occours with 2.4, too) on a Debian stable Box, x86 Hardware, at least all the libs that are used by dovecot and the compiler is from debian stable.

I have a few pop/imap boxes here running dovecot, s.th. around 10 boxes or so, the problem only exists on machines which have a bit more traffic (upto 30 simultan users). On the small ones dovecot runs forever without any problem.

best regards/Mit freundlichen Grüßen Jens Gutzeit