Have you really disabled all caches? Also 
https://doc.powerdns.com/authoritative/settings.html#zone-cache-refresh-interval
 ?
regards
Klaus

-----Ursprüngliche Nachricht-----
Von: Pdns-users <pdns-users-boun...@mailman.powerdns.com> Im Auftrag von Andrea 
Biscuola via Pdns-users
Gesendet: Donnerstag, 24. Februar 2022 15:12
An: pdns-users@mailman.powerdns.com
Betreff: [Pdns-users] Negative cache upon zone creation

Hello.

In our PowerDNS setup, all of the PowerDNS authoritative server caches are 
turned off, apart for the max-packet-cache-entries setting that is set to the 
default, as the same service is given by a series of DNSDist daemons running on 
top of the PowerDNS ones.

However, querying one of the PowerDNS servers directly for a zone that does not 
exists, extends the negative response way after we created the zone. This 
affects some automated systems, where the DNS servers are automatically changed 
a the registrar, causing the registrar verification process to fail.

So, to recap:

1 - We query PowerDNS (NOT DNSDist) for a non existing zone.
2 - Correctly, PowerDNS responds that the zone does not exists.
3 - In the meantime we create the zone.
4 - PowerDNS continues to respond with a negative response after the zone is 
created.
5 - PowerDNS gives us the proper response, only after we stop querying it for 
some time.

Are we missing something? Or is it expected to work just like that? Then we 
could accomodate our software for that.

Thank you.

Andrea
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