https://bugs.openldap.org/show_bug.cgi?id=10604
--- Comment #2 from Ondřej Kuzník ondra@mistotebe.net --- On Tue, Sep 22, 2026 at 11:35:28AM +0000, openldap-its@openldap.org wrote:
We are not certain of the exact internal root cause. We are reporting this because the minimal reproduction below is clean, small, and - in our testing
reliably triggers the symptom at or above roughly 1000 sequential Addoperations on a single provider/single consumer pair, with no crash, no network impairment, and no other variable we have been able to identify as causal (see "Ruled out" below).
Dear Elia, since you say this is reproducible in a synthetic test environment, even if you reproduce this under 2.6.15, we would need to see the stats+sync logs from both provider/consumer affected. Even with 2.6.10, you can check for yourself whether messages with a new cookie have been transmitted in CSN order. That would point at which party is at fault here and help investigate the issue.
Thanks,