[Pdns-users] servfail-packets>0 but no data in servfail-queries ring buffer

Martin Kellermann kellermann at sk-datentechnik.com
Thu Apr 9 07:56:42 UTC 2020


PowerDNS Auth Server 4.3.0 with PostgreSQL backend

I'm facing the fact, that sometimes the servfail-packets counter increases and i would debug this and find the reason why PowerDNS sends out a "servfail" packet.

Actually today the counter increased from 0 to 2 and i don't know why!

https://doc.powerdns.com/authoritative/performance.html#servfail-packets tells me, that this is due to a database problem.

https://doc.powerdns.com/authoritative/performance.html#ring-buffers tells me that the servfail-queries ring-buffer shows which queries have been causing servfails.

But when i look at this ring-buffer (server:8081/?ring=servfail-queries) there are no entries - it's empty.

can someone please explain, what am i missing or not understanding correctly?

I noticed this behaviour for a long time and over different versions (4.1, and 4.2).

Last time i asked, there was no answer: https://mailman.powerdns.com/pipermail/pdns-users/2019-February/025767.html



-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.powerdns.com/pipermail/pdns-users/attachments/20200409/aaacccde/attachment.htm>

More information about the Pdns-users mailing list