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

[Colin Law]

On Tue, 31 Mar 2020 at 22:32, Chris Green <cl at isbd.net> wrote:
>
> On Tue, Mar 31, 2020 at 10:19:38PM +0100, Colin Law wrote:
> > On Tue, 31 Mar 2020 at 21:28, Chris Green <cl at isbd.net> wrote:
> > >
> > > I have a small home LAN with dnsmasq running on a Raspberry Pi to
> > > provide DHCP and DNS services.  I have two systems running xubuntu
> > > 19.10 and on these systems I see a 5 second delay the *first* time I
> > > look up the address of a local host.  Subsequent lookups are fast but
> > > if the system is idle for a long time (I haven't quite fathomed out
> > > how long) I see the 5 second delay again.
> >
> > Do you see anything relevant in syslog at this time?
> > I think I have seen something like this before.  I have pushed the
> > problem into my subconscious and hope that when I wake up in the
> > morning the memory will be recalled.  Or maybe not .....
> >
> No, nothing of great relevance.  It only confirms what my tcpdump
> output shows really.

Could you post what you see in syslog please, it may trigger my memory recall.

Colin