Hi Ondřej,
A byzantine java application connects to the LDAP server, and somehow uses the information
presented to trigger API requests to business logic, eventually resulting in the data
being replicated to a relational database. If olcSpNoPresent is honoured, this works. It
it’s ignored, it dies with an error. I have, as yet, been unable to find an engineer who
can explain this behaviour to me, and this code is largely forgotten.
It seems reasonable to me that if I configure slapd to not do a Present phase, then it
shouldn’t do a Present phase? Am I wrong?
Thanks!
Lisa
From: Ondřej Kuzník <ondra(a)mistotebe.net>
Date: Wednesday, 9 March 2022 at 16:32
To: Lisa Parratt <Lisa.Parratt(a)bjss.com>
Cc: Quanah Gibson-Mount <quanah(a)fast-mail.org>, openldap-technical(a)openldap.org
<openldap-technical(a)openldap.org>
Subject: Re: syncprov olcSpNoPresent not being honoured
On Wed, Mar 09, 2022 at 09:04:49AM +0000, Lisa Parratt wrote:
Hi Quanah,
It’s not a replication setup. The consumer is a relatively ancient
proprietary implementation of the syncrepl protocol, over which I have
very influence.
I believe the problem is syncprov.c lines 3335 and 3341, which appear
to be setting `do_present = SS_PRESENT;` while simultaneously ignoring
the value of si->si_nopres. Replacing the lines above with `if (
!si->si_nopres ) do_present = SS_PRESENT;` appears to fix the problem
for my use case, and is closer to how the logic worked in previous
versions of slapd.
Hi Lisa,
I find it strange that you maintain a sessionlog (or use accesslog to host
it) yet don't want to host a present/delete phase which is where they
are useful. Could you explain what you're trying to achieve with your
set up?
--
Ondřej Kuzník
Senior Software Engineer
Symas Corporation
http://www.symas.com
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