dovecot - Mar 2007 - imap connection problems

Hi,

Have encountered some strange behavior of dovecot: after few days of 
work (5-7 days, ~50 users, imap over ssl or tls) dovecot stops respond 
with "* OK Dovecot ready.". I.e. connection gets accepted, but no 
response from dovecot:

[ivan at dyn-226 bin]$ telnet imap 143
Trying 192.168.100.9...
Connected to imap.n-ix.com.ua (192.168.100.9).
Escape character is '^]'.

while obvious should be

[ivan at dyn-226 bin]$ telnet imap 143
Trying 192.168.100.9...
Connected to imap.n-ix.com.ua (192.168.100.9).
Escape character is '^]'.
* OK Dovecot ready.

After dovecot restart everything works OK. This behavior we started to 
observe since rc24, before that on rc9 we didn't see that problem. 
Currently running on rc26.

Any ideas?

Thanks,
 Iv

On Tue, 2007-03-13 at 12:12 +0200, Ivan Pesin wrote:
> Have encountered some strange behavior of dovecot: after few days of 
> work (5-7 days, ~50 users, imap over ssl or tls) dovecot stops respond 
> with "* OK Dovecot ready.". I.e. connection gets accepted, but no
> response from dovecot:
> 
> [ivan at dyn-226 bin]$ telnet imap 143
> Trying 192.168.100.9...
> Connected to imap.n-ix.com.ua (192.168.100.9).
> Escape character is '^]'.
It usually means that dovecot-auth isn't responding.
> After dovecot restart everything works OK. This behavior we started to 
> observe since rc24, before that on rc9 we didn't see that problem. 
> Currently running on rc26.
Show "dovecot -n" output?

Also when it happens, strace the dovecot-auth process to see what it's
doing. http://wiki.dovecot.org/Debugging/ProcessTracing

Or you don't mention anything about logs .. Did you check if it writes
anything there? http://wiki.dovecot.org/Logging

-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 189 bytes
Desc: This is a digitally signed message part
URL:
<http://dovecot.org/pipermail/dovecot/attachments/20070313/43f6f4d9/attachment.bin>