check_root diagnostic in bind8

[Ted_Rule at flextech.co.uk]

I found this somewhat worrying looking missive in the logs today.

Nov 17 15:27:40 intranot named[490]: check_root: 1 root servers after query to
root server < min

Looking back at this months logs I only found one other instance

Nov  3 14:55:56 fttvgpsutil3 named[430]: check_root: 1 root servers after query
to root server < min

All timestamps are GMT - should anyone have spotted something similar at the
same time.

Both of these servers are internal bind-8.2.2-P5 set to forward-only to an
instance of bind running on
a Borderware Firewall - which didn't itself seemingly complain at the same time
- which is odd in itself.

I can only assume at the moment that the root server queried - or perhaps the
instance of bind on the Borderware
Firewall - managed to return a response containing only "itself".

Whilst nothing obviously seems to have broken as a result, it occurs to me that
a little extra diagnostic
in this message wouldn't go amiss - I'm unaware whether any extra diagnostic has
 been added to bind9
in this regard.

My suggested enhancement would be:

Nov 17 15:27:40 intranot named[490]: check_root: 1 root servers [198.41.0.4]
after query to root server (a.root-servers.net [198.41.0.4])< minroots(2)

but obviously I'm open to other thoughts on the matter, and I fully realise it
would be difficult to code listing all the server addresses returned in this
instance:

Nov 17 15:27:40 intranot named[490]: check_root: 2 root servers [198.41.0.4],
[128.9.0.107] after query to root server (a.root-servers.net [198.41.0.4]) <
minroots(3)

as it leads to all sorts of dynamic string memory allocation fun and games....



Ted


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