dig . NS (responds with only one root server, A record)

[Håkan Ahlström]

Hi!

I've recently installed a couple of new slave servers (Bind 9.2.3). 
Everything seems ok except for one thing:

When I run 'dig . NS @localhost' immediately after starting named I get 
this output:

----------------------
; <<>> DiG 9.2.3 <<>>
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 29676
;; flags: qr rd ra; QUERY: 1, ANSWER: 13, AUTHORITY: 0, ADDITIONAL: 13

;; QUESTION SECTION:
;.                              IN      NS

;; ANSWER SECTION:
.                       427646  IN      NS      H.ROOT-SERVERS.NET.
.                       427646  IN      NS      C.ROOT-SERVERS.NET.
.                       427646  IN      NS      G.ROOT-SERVERS.NET.
.                       427646  IN      NS      F.ROOT-SERVERS.NET.
.                       427646  IN      NS      B.ROOT-SERVERS.NET.
.                       427646  IN      NS      J.ROOT-SERVERS.NET.
.                       427646  IN      NS      K.ROOT-SERVERS.NET.
.                       427646  IN      NS      L.ROOT-SERVERS.NET.
.                       427646  IN      NS      M.ROOT-SERVERS.NET.
.                       427646  IN      NS      I.ROOT-SERVERS.NET.
.                       427646  IN      NS      E.ROOT-SERVERS.NET.
.                       427646  IN      NS      D.ROOT-SERVERS.NET.
.                       427646  IN      NS      A.ROOT-SERVERS.NET.

;; ADDITIONAL SECTION:
H.ROOT-SERVERS.NET.     514046  IN      A       128.63.2.53
C.ROOT-SERVERS.NET.     514046  IN      A       192.33.4.12
G.ROOT-SERVERS.NET.     514046  IN      A       192.112.36.4
F.ROOT-SERVERS.NET.     514046  IN      A       192.5.5.241
B.ROOT-SERVERS.NET.     514046  IN      A       192.228.79.201
J.ROOT-SERVERS.NET.     514046  IN      A       192.58.128.30
K.ROOT-SERVERS.NET.     514046  IN      A       193.0.14.129
L.ROOT-SERVERS.NET.     514046  IN      A       198.32.64.12
M.ROOT-SERVERS.NET.     514046  IN      A       202.12.27.33
I.ROOT-SERVERS.NET.     514046  IN      A       192.36.148.17
E.ROOT-SERVERS.NET.     514046  IN      A       192.203.230.10
D.ROOT-SERVERS.NET.     514046  IN      A       128.8.10.90
A.ROOT-SERVERS.NET.     514046  IN      A       198.41.0.4

;; Query time: 1 msec
;; SERVER:  127.0.0.1#53(localhost)
;; WHEN: Tue Oct 25 11:06:56 2005
;; MSG SIZE  rcvd: 436
----------------------

This is fine but when I run the same command after a couple of minutes 
all servers, except J.ROOT-SERVERS.NET, have disappeared under 
'ADDITIONAL SECTION'.

My master server runs Bind v8 and have never had this problem. The 
configuration is the same on both except for the master/slave specific 
configuration. I've updated the named.root file and I haven't found any 
error messages in my logs.

Is this a bug or a feature? Or maybe some misconfiguration...?

Any ideas are appreciated! Thanks in advance!

-Håkan