I am now running Symas openldap 2.5.11 with the same config and database in an "one producer / one consumer" setup.
The same vm:s are used (Rocky Linux 8) and this setup is working.

I do not have the possibility to test the debug/core-dump until next week, but I will try to do it.
(I probably need some intructions...)

Thanks for your help so far.

Från: Quanah Gibson-Mount <quanah@fast-mail.org>
Skickat: den 27 april 2022 17:06
Till: Ulrich Windl <Ulrich.Windl@rz.uni-regensburg.de>; Magnus Morén <magnus.moren@hh.se>; openldap-technical@openldap.org <openldap-technical@openldap.org>
Ämne: Re: Antw: [EXT] slapd (Symas 2.6.1) does not start with syncprov

--On Wednesday, April 27, 2022 9:41 AM +0200 Ulrich Windl
<Ulrich.Windl@rz.uni-regensburg.de> wrote:

>> 0).
>> Apr 26 18:31:27 apollo11 systemd‑coredump[1381]: Resource limits
>> disable
> core
>> dumping for process 1377 (slapd).
> So maybe enable core dumps and show the backtrace.

Yep, assuming it's not an issue with the VM software being used, this would
be the next general step.  I would note that installing the relevant debug
symbol packages for slapd will be necessary as well.

It may be needed to attach to the slapd process with GDB prior to running
the syncprov change as well, since core dumps often lose useful information
that the running process has.