On Sun, Aug 26, 2018 at 08:23:24PM -0500, Jon Schewe wrote: > I run a caching DNS server locally and it also serves up the domain for my > house. Since I upgrade from Ubuntu 16.04 to Ubuntu 18.04 I started seeing a > number of errors from named like this: > > 26-Aug-2018 08:05:21.536 general: error: > ../../../../lib/isc/unix/socket.c:2135: unexpected error: > 26-Aug-2018 08:05:21.537 general: error: internal_send: > 192.168.42.11#44893: Invalid argument > > I have done some Google searching and haven't found a way to track down > what these errors are about. The hosts giving the errors vary. I've turned > on some more logging and gotten a little more information, but nothing that > I know how to act on yet. Hi Jon You might get more information using strace. You can attach to a running process using -p <PID>. Andrew