dovecot - Sep 2010 - 1.2.14 --- auth(default) Error: LDAP: Connection lost to LDAP server, reconnecting

hi,

I see in dovecots logfile some error messages:

Sep 29 15:33:43 auth(default): Error: LDAP: Connection lost to LDAP
server, reconnecting
Sep 29 15:34:15 auth(default): Error: LDAP: Connection lost to LDAP
server, reconnecting
Sep 29 15:34:50 auth(default): Error: LDAP: Connection lost to LDAP
server, reconnecting
Sep 29 15:35:22 auth(default): Error: LDAP: Connection lost to LDAP
server, reconnecting
Sep 29 15:36:01 auth(default): Error: LDAP: Connection lost to LDAP
server, reconnecting
Sep 29 15:36:37 auth(default): Error: LDAP: Connection lost to LDAP
server, reconnecting
Sep 29 15:37:16 auth(default): Error: LDAP: Connection lost to LDAP
server, reconnecting
Sep 29 15:37:52 auth(default): Error: LDAP: Connection lost to LDAP
server, reconnecting
Sep 29 15:38:24 auth(default): Error: LDAP: Connection lost to LDAP
server, reconnecting

I don't know, what could be the problem. I upgraded Dovecot from 1.2.13
to 1.2.14 to solving the problem, but ... no success. 

Our LDAP Server is 2.4.23 and works for our network without any
problems.

If I try to use ldapsearch from the Dovecot host, while I see the
messages, ldapsearch works withouch any timeout. I enabled caching for
auth too, but the problem still exists.

My DoveCot Config:

http://pastebin.com/W7zHf4fT

the LDAP part:

hosts = ldap ldap2
auth_bind = yes
ldap_version = 3
base = cn=accounts, dc=foo
user_attrs = postalAddress=domain, homeDirectory=/imap/spool/%d/%1n/%n,
myMailQuota=quota_rule=*:storage=%$M
user_filter = (&(objectClass=posixAccount)(uid=%n))
pass_attrs = postalAddress=domain, uid=user, userPassword=password
pass_filter = (&(objectClass=posixAccount)(uid=%n))
default_pass_scheme = MD5

any suggestions?

cu denny

ps. when does dovecot switches to ldap2? 
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hi,

I enabled a bit more logging and it seems, that "auth" try to connect
without anything:

# grep conn=1103 local4.log

http://pastebin.com/a1h1YE8P


cu denny
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On 2010-09-29 10:09 AM, Denny Schierz wrote:
> My DoveCot Config:
> 
> http://pastebin.com/W7zHf4fT
Please don't do this (it makes it harder to help you) - just paste the
output in the email body...

-- 

Best regards,

Charles

On 2010-09-29 10:26 AM, Denny Schierz wrote:
> # grep conn=1103 local4.log
> 
> http://pastebin.com/a1h1YE8P
Same for this...

-- 

Best regards,

Charles

On Wed, 2010-09-29 at 16:09 +0200, Denny Schierz wrote:
> Sep 29 15:33:43 auth(default): Error: LDAP: Connection lost to LDAP
> server, reconnecting
> Sep 29 15:34:15 auth(default): Error: LDAP: Connection lost to LDAP
> server, reconnecting
You've configured LDAP server to have a really small connection idle
timeout?
> hosts = ldap ldap2
> 
> ps. when does dovecot switches to ldap2? 
Dovecot doesn't switch. OpenLDAP library switches. I don't know what its
internal log is. My guess is it first always connects to ldap, and if
that fails then it connects to ldap2 (and never switches back, until
connection is lost).