[Pdns-users] Bad cache TTL with pdns-resursor

[bert hubert]

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 at 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 at 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 at 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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