Re: Connection Stability Troubles with LDAP

[Oliver Egginger <Oliver.Egginger@dvz.fh-giessen.de>]

1. I suppose you do (some of) your tests direct on the local machine.
(So we could exclude a network problem.)

2. When the problem appears:
There are unusually messages in the slapd (debug) output ?
What says the system event log ? (I know there exist something like this under Windows). 

3. What happens if you run the tests, which comes with the OpenLDAP packet.

4.  Do the problem (still) exist if you change the backend ?


- oliver



> We are running OpenLDAP 2.0.7 on Windows 2000 with a Berkley DB (ldbm)
> backend.
>
> The problem we are having is that connections fail for an unknown reason.
> The service is still running, but connections to the LDAP service are
> rejected with "ldap_bind: Can't contact LDAP server".  It is not a
> configuration problem because we performed successful ldapsearch commands
> just prior to the problem occurring.  The same ldapsearch command failed
> when the problem occurred.  After I stopped/restarted the openldap service,
> the ldapsearch worked again.  Stopping the service took a long time - 1 or
> 2 minutes.  It normally takes seconds.  Also, if we leave it alone (i.e.
> don't stop/restart the service) connections to LDAP are successful again
> after a short period of time.
>
> I tried running a load test with several clients sending endless ldapsearch
> commands, but LDAP responded to each client without a hiccup.  We are
> thinking that it is a combination of requests within our code that is
> causing the problem, but can't track it down yet.  We do not perform any
> modifies within the code.  The code that is running when the connections
> are lost only performs searches.  The only updates we do are in a
> completely separate application that is not running at the time of our
> problems.
>
> Are there any known connection stability issues with the version of
> openldap we are using or the platform on which we are running?  Does anyone
> have any insight into the problems we are encountering?
>
> Thanks for any help you may have.
>
> --
> Shane C. Marshall
> Database Administrator
> smarshall@softricity.com
>
>
> Softricity, Inc.
> 332 Congress Street
> Boston, MA 02210
> ph 617.695.0336 x169
> fx 617.338.7769
> www.softricity.com - Powering Software as a Service

-- 
Oliver Egginger
FH Giessen-Friedberg
DV-Zentrum
Wiesenstrasse 14
35390 Giessen
Tel. +49 641 309-1283
Fax  +49 641 309-2908
Mail: Oliver.Egginger@dvz.fh-giessen.de


****************************************************
Sprechzeiten des DV-Zentrums fuer 
E-Mail-Angelegenheiten:

Mo	11:30 - 15:30 Uhr
Di	13:15 - 15:30 Uhr
Do	 9:30 - 16:00 Uhr
Fr	 9:45 - 11:45 Uhr
****************************************************