On 16/04/2012 8:52 p.m., Vincent Miszczak wrote:
Hello,
I have a strange issue with at least one URL :
http://d.businessinsider.com/
The host does not exist and cannot be resolved. But instead of telling me that Squid cannot resolve the host (as it does for example for the non existing http://zfsdfo.sdfdsfrgq.com/ ), Squid gives no response, and make the browser wait forever. This URL is included in the page : http://www.businessinsider.com/best-company-perks-2011-5 which never loads.
While accessing the non existing URL, cache.log gives :
2012/04/16 10:48:06| ipcacheParse: No Address records in response to 'd.businessinsider.com'
No message is logged when accessing another non existing host.
Do I have a configuration issue or is this a Squid issue ?
This is a DNS configuration issue. Squid is a DNS client, not a
recursive resolver. It relies on your DNS server to perform all DNS
recursive lookups and identify the full response.
"No Address records in response" means that Squid received a possitive
response (domain *does* exist), but no IP addresses were supplied in
that response.
A quick dig shows:
"
; <<>> DiG 9.3.6-P1 <<>> d.businessinsider.com
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 34561
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 1, ADDITIONAL: 0
;; QUESTION SECTION:
;d.businessinsider.com. IN A
;; ANSWER SECTION:
d.businessinsider.com. 86230 IN CNAME
businessinsider-d.openxenterprise.com.
;; AUTHORITY SECTION:
openxenterprise.com. 10630 IN SOA ns1-208.akam.net.
systems.openx.org. 2011062950 10800 3600 2678400 10800
;; Query time: 2 msec
;; SERVER: 209.169.0.1#53(209.169.0.1)
;; WHEN: Mon Apr 16 06:14:12 2012
;; MSG SIZE rcvd: 156
"
You will see this recorded as CNAME-only response count in your DNS stats.
Why its hanging I'm not sure. You should be getting that resolver error
page back from these as well.
Amos
