problem resolving domains with bind9.5.0-P2

Matthias Brehm Matthias.Brehm at
Wed Sep 9 09:34:26 UTC 2009

Dear all,


we use bind9.5.0-P2 for the internet dns server. 

Sometimes we get no response for some domains, like this:


; <<>> DiG 9.3.2 <<>>

;; global options:  printcmd

;; Got answer:

;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 34869

;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0



;   IN      A


;; Query time: 166 msec


;; WHEN: Fri Aug 21 11:00:01 2009

;; MSG SIZE  rcvd: 45


If we ask the same question a few seconds later, we get a correct
answer. ( e.g. two out-of ten we get an error)

Then we stop and start the named daemon and it works fine for a while.


Any ideas?

How can we debug this issue? 


Thanks in advance.


Greets, Matthias




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