BIND error: opcode: QUERY, status: SERVFAIL

[Mark Andrews]

goelexports is served by:

goelexports.com.	86400	IN	NS	ns5.webcomindia.net.
goelexports.com.	86400	IN	NS	ns4.webcomindia.net.

ns4.webcomindia.net and ns5.webcomindia.net are served by:

webcomindia.net.	172800	IN	NS	ns9.hostsearchindia.com.
webcomindia.net.	172800	IN	NS	ns10.hostsearchindia.com.

ns9.hostsearchindia.com and ns10.hostsearchindia.com are served by:

hostsearchindia.com.	172800	IN	NS	ns.hostsearchindia.com.
hostsearchindia.com.	172800	IN	NS	ns2.hostsearchindia.com.

according to COM and don't exist other than as glue records.  This
leads to intermittent failures as records timeout and cannot be
refreshed named has been told that the zones don't exist.

; <<>> DiG 9.6.0-APPLE-P2 <<>> ns.hostsearchindia.com @69.16.253.121
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 58722
;; flags: qr aa rd; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0
;; WARNING: recursion requested but not available

;; QUESTION SECTION:
;ns.hostsearchindia.com.		IN	A

;; AUTHORITY SECTION:
hostsearchindia.com.	86400	IN	SOA	ns4.webcomindia.net. amit.sood.webcomindia.net. 2011042804 86400 7200 3600000 86400

;; Query time: 324 msec
;; SERVER: 69.16.253.121#53(69.16.253.121)
;; WHEN: Sat Jun  4 13:31:16 2011
;; MSG SIZE  rcvd: 105

Now the hostsearchindia.com zone says it is served by:

hostsearchindia.com.	86400	IN	NS	ns4.webcomindia.net.
hostsearchindia.com.	86400	IN	NS	ns5.webcomindia.net.

don't match the records listed in COM.  The fix is to make sure that
the delegation is constitent and that all nameservers have address
records.

Mark
-- 
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: marka at isc.org