Hi bert,
Thanks for the answer I've uderstand the strange ttl response when the
answer come from the paquet cache.
Now here is a little more strange problem
########################################
;; QUESTION SECTION:
;s4.noelshack.com. IN A
;; ANSWER SECTION:
s4.noelshack.com. 3600 IN CNAME noelshack.com.
noelshack.com. 3600 IN A 91.121.63.175
########################################
;; QUESTION SECTION:
;s4.noelshack.com. IN NS
;; ANSWER SECTION:
s4.noelshack.com. 2175 IN CNAME noelshack.com.
noelshack.com. 85974 IN NS ns1.afraid.org.
noelshack.com. 85974 IN NS ns4.afraid.org.
noelshack.com. 85974 IN NS ns2.afraid.org.
noelshack.com. 85974 IN NS ns3.afraid.org.
########################################
;; QUESTION SECTION:
;noelshack.com. IN SOA
;; ANSWER SECTION:
noelshack.com. 3535 IN SOA ns1.afraid.org.
dnsadmin.afraid.org. 1110170003 86400 7200 2419200 3600
########################################
The zone noelshack.com. have moved since more than a week at
ns-01.odysseeinteractive.com
The correct answer from another pdns_recursor :
#########################################
;; QUESTION SECTION:
;noelshack.com. IN SOA
;; ANSWER SECTION:
noelshack.com. 86281 IN SOA
ns-01.odysseeinteractive.com. noc.odysseeinteractive.com. 2011122801
86400 7200 604800 86400
#########################################
The ttl on this zone nerver goes to 0 and moreover after 1 hour ( the
paquet cache duration) is sometime increased.
We have around 100 servers and half are affected by this problem... The
only solution I've find is to wipe the cache for this dns entrie.
There is no reason to do this since 1 week as the TTL on the soa is only
86400...
Any ideas?
Kind regards
Michael
On 12/29/2011 04:20 PM, bert hubert wrote:
Hi Michael,
The SOA will indeed probably not go to zero because it will have been
renewed in that time. PowerDNS Recursor 3.3 and later take care to decrement
the TTL when serving contents from the packet cache.
So when you don't see it going down in 3.2, that is correct, and maybe a bit
strange, but not a bug.
Bert
On Thu, Dec 29, 2011 at 10:08:53AM +0100, Michael FROMENT wrote:
Hi,
I have some strange cached TTL on my pdns-recursor ( version 3.2-4 under
debian ).
When I query my recursor the TTL doesn't decrease by 1 second. Moreover the
TTL never goes to 0 so the zone never expire in cache.
As an example:
root@BBK2NS:~# dig soa google.com @89.2.0.1
;; ANSWER SECTION:
google.com. 569 IN SOA ns1.google.com.
dns-admin.google.com. 1472387 7200 1800 1209600 300
;; Query time: 0 msec
;; SERVER: 89.2.0.1#53(89.2.0.1)
;; WHEN: Thu Dec 29 10:02:46 2011
;; MSG SIZE rcvd: 78
root@BBK2NS:~# dig soa google.com @89.2.0.1
;; ANSWER SECTION:
google.com. 40 IN SOA ns1.google.com.
dns-admin.google.com. 1472388 7200 1800 1209600 300
;; Query time: 0 msec
;; SERVER: 89.2.0.1#53(89.2.0.1)
;; WHEN: Thu Dec 29 10:02:47 2011
;; MSG SIZE rcvd: 78
root@BBK2NS:~# dig soa google.com @89.2.0.1
;; ANSWER SECTION:
google.com. 562 IN SOA ns1.google.com.
dns-admin.google.com. 1472388 7200 1800 1209600 300
;; Query time: 0 msec
;; SERVER: 89.2.0.1#53(89.2.0.1)
;; WHEN: Thu Dec 29 10:04:08 2011
;; MSG SIZE rcvd: 78
Is this a known bug on the recursor?
Kind Regards
Michael
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