-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi,
sometimes the pdns_recursor doesn't send all A or AAAA records where the requested CNAME points to. There are no cascading CNAMES, the CNAME points to an A record. In the first query the A records are missing, some seconds (and several more requests) later the A records were sent, too The TTL shows that the records are fetched by pdns_recursor in the same second. Hint: the 'X' in hostnames and IP addresses is a replacement of other chars and digits. Additional informations: We are running 2 instances of pdns_recursor listening at different ports on this IP to scale the amount of queries. The concerning instance has a load average of round about 1500 qps. There are no error messages in the log - so I wonder what's happened? There is another issue that sometimes existing AAAA records of another host not sent but only the A records. I think, when there was an error condition during recursion the pdns_recursor has to sent a SERVFAIL, but it didn't. So it may be possible that there is an issue in the cache management when a refresh is needed it is not performed immediately? Any idea? - ------------------------------------------------ ~ # dig XXftp.rz-ip.net ; <<>> DiG 9.3.4 <<>> XXftp.rz-ip.net ;; global options: printcmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 36210 ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0 ;; QUESTION SECTION: ;XXftp.rz-ip.net. IN A ;; ANSWER SECTION: XXftp.rz-ip.net. 1545 IN CNAME XXXservices.rz-ip.net. ;; Query time: 2 msec ;; SERVER: 85.214.7.22#53(85.214.7.22) ;; WHEN: Thu Jul 16 00:25:24 2009 ;; MSG SIZE rcvd: 56 - --------------------------------------------- ~ # dig XXftp.rz-ip.net ; <<>> DiG 9.3.4 <<>> XXftp.rz-ip.net ;; global options: printcmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 42761 ;; flags: qr rd ra; QUERY: 1, ANSWER: 3, AUTHORITY: 0, ADDITIONAL: 0 ;; QUESTION SECTION: ;XXftp.rz-ip.net. IN A ;; ANSWER SECTION: XXftp.rz-ip.net. 1510 IN CNAME XXXservices.rz-ip.net. XXXservices.rz-ip.net. 1800 IN A XXX.XXX.XXX.XXX XXXservices.rz-ip.net. 1800 IN A XXX.XXX.XXX.XXX ;; Query time: 1 msec ;; SERVER: 85.214.7.22#53(85.214.7.22) ;; WHEN: Thu Jul 16 00:25:59 2009 ;; MSG SIZE rcvd: 88 - ----------------------------------------------------- Best regards - -- Tom Mueller Entwicklung Dedicated Servers - ------------------------------------------------------------ Telefon: + 49 (0)30 - 398 02 - 0 Telefax: + 49 (0)30 - 398 02 - 222 E-Mail: [email protected] - ------------------------------------------------------------ Strato Rechenzentrum AG Pascalstr. 10 10587 Berlin - ----------------------------- ------------------------------- Aufsichtsrat: Damian Schmidt (Vorsitz), Stephan Esch, Andreas Sand Vorstand: Julien Ardisson, Christian Mueller, Christoph Steffens, Rene Wienholtz Amtsgericht Berlin-Charlottenburg HRB 75629 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFKXxlaboB3gPvObwIRAvCrAJ9EOM8YNYHq+J159rMggyIBQ/Wq5wCfd/+2 QrQrCXr/gsxfA4UvwMcmwTg= =1UMy -----END PGP SIGNATURE----- _______________________________________________ Pdns-users mailing list [email protected] http://mailman.powerdns.com/mailman/listinfo/pdns-users
