[Dovecot] auth: Error: LDAP: Connection lost to LDAP server, reconnecting

Angel L. Mateo amateo at um.es
Mon Aug 29 12:44:50 EEST 2011

El 29/08/11 05:26, Timo Sirainen escribió:
> On Fri, 2011-08-26 at 13:01 +0200, Angel L. Mateo wrote:
>> El 25/08/11 12:10, Timo Sirainen escribió:
>>> On 25.8.2011, at 13.04, Angel L. Mateo wrote:
>>>> Aug 24 23:07:32 myotis28 dovecot: auth-worker(default): LDAP: Connection lost to LDAP server, reconnecting
>>>> 	I have seen in the mail list a patch for 1.2 (http://hg.dovecot.org/dovecot-1.2/rev/355d5a40f7a7) to ignore these logs when the disconnection is because of idle timeouts. As far as I could see in this patch and 2.0.13 source code, this patch is already applied in 2.0. So I guess that the disconnection is for other problem, isn't it?
>>> I had completely forgotten I had added such a feature :) See what it logs with attached patch.
>> 	I have tried the patch. It confirms my hypothesis, the connection is
>> closed by my load balancer:
>> Aug 26 12:55:27 myotis31 dovecot: auth: Error: LDAP: Connection lost to
>> LDAP server, reconnecting (1 requests, 3603 idle secs)
> Ah. So this is noticed only when Dovecot tries to use the LDAP
> connection that it's been disconnected.
>> 	Is there any way to configure ldap connection with a keepalive, so I
>> don't need a reconnection?
> Nope. But you could configure your LDAP server to idle-disconnect after
> some amount of time.
	I know it, but configuring LDAP server does not resolve the problem, 
because the error (in fact it's just an informational message) still 

	I think the solution is to configure the dovecot auth_cache_ttl to a 
value less than the idletimeout of the ldap server.

Angel L. Mateo Martínez
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