DNS delay on first lookup, Ubuntu 19.10 but not earlier versions

[Chris Green]

On Wed, Apr 01, 2020 at 08:29:56PM +1100, Karl Auer wrote:
> On Wed, 2020-04-01 at 09:19 +0100, Chris Green wrote:
> > The Raspberry Pi on the LAN runs dnsmasq which provides DHCP and DNS
> > so when a system asks for the address of esprimo.zbmc.eu the
> > Raspberry Pi answers.
> 
> Unless you are running that domain ON the Pi, the Pi will have to
> forward the query outside your network to get any answers about it.
> 
> Once obtained, the answers will remain valid for a period of time (the
> TTL) before the Pi asks again. 
> 
> That particular name doesn't seem to resolve on the normal DNS, and
> five seconds seems a long delay for an authoritative response (and too
> short for a failover).
> 
> Post the output of "dig esprimo.zbmc.eu"...
> 
zbmc.eu is the local domain.  All systems on the LAN register (using
DHCP) with the Pi so it knows about all the systems on the LAN.  The
bug only affects my two systems running xubuntu 19.10, all other
systems (Debian, xubuntu 18.04, MS Windows) work with no delay.

-- 
Chris Green