round-robin bug in 9.12.1-P2 for rDNS?

[Mark Boolootian]

Hi folks,

I have a funny issue that looks buggish
to me. I have an RRSET with two
A records that our auth DNS servers happily
round-robin, which can be observed with

dig unix.lt.ucsc.edu @adns1.ucsc.edu

However, our recursive DNS servers, with
the same rrset-order config will not round-robin
these records.

BUT, if I add a third A record, the rDNS servers
then round-robin.

I can punch in some config elements here if
it is useful, but this smells like a bug, and
maybe I should be reporting on gitlab.

Thoughts?

mark
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[Michał Kępień]

Post by Mark Boolootian
I have a funny issue that looks buggish
to me. I have an RRSET with two
A records that our auth DNS servers happily
round-robin, which can be observed with
However, our recursive DNS servers, with
the same rrset-order config will not round-robin
these records.
BUT, if I add a third A record, the rDNS servers
then round-robin.
I can punch in some config elements here if
it is useful, but this smells like a bug, and
maybe I should be reporting on gitlab.
Thoughts?

This sounds a bit like #336 [1], but you mentioned rrset-order being
explicitly set in your configuration, so it might be something else. If
you can still reproduce this with current master (or with current v9_12
branch), please open a new GitLab issue. Thanks!

[1] https://gitlab.isc.org/isc-projects/bind9/issues/336

[Mark Boolootian]

Hi Michał,

Thanks for the ack.

Post by Michał Kępień
This sounds a bit like #336 [1],

Nope - we got bit by that when we upgraded
to 9.12, which is what resulted in the explicit
config for rrset-order.

Post by Michał Kępień
If you can still reproduce this with current
master (or with current v9_12 branch), please
open a new GitLab issue.

Please forgive my ignorance on this point,
but is running the FreeBSD package for
9.12.1-P2 sufficient to meet this? We don't
usually build directly from source (for operational
reasons).

Many thanks and best regards,
mark
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[Michał Kępień]

Post by Mark Boolootian

Post by Michał Kępień
This sounds a bit like #336 [1],

Nope - we got bit by that when we upgraded
to 9.12, which is what resulted in the explicit
config for rrset-order.

Post by Michał Kępień
If you can still reproduce this with current
master (or with current v9_12 branch), please
open a new GitLab issue.

Please forgive my ignorance on this point,
but is running the FreeBSD package for
9.12.1-P2 sufficient to meet this?

It probably is, the #336 bit above was a long shot. Please open a
GitLab issue, supplying version information and a configuration which
allows reproducing this behavior.

Thanks!