Hello Grant, I was hoping for a somewhat smaller capture. Hints about where in this capture the issue occurs are welcome :)
Kind regards, Peter van Dijk On Oct 5, 2011, at 2:16 AM, Grant Keller wrote: > Here are the pcaps from the server in question. > > ftp://ftp.sonic.net/pub/users/gkeller/tcp_pcap > > Thank you for your help so far. > > >> Hello Grant, >> >> On Sep 30, 2011, at 7:12 PM, Grant Keller wrote: >> >>> We have been having this problem with TCP queries timing out on one of our >>> nameservers running pdns 3. We have a monitor that runs every two minutes, >>> and every half hour or so it times out on its query. I can reproduce this >>> by running the following: >>> >>> while [ 1 ]; do >>> dig schwer.us +recurse +tcp +short +time=1 +retry=1 @c.ns.sr.sonic.net >>> date >>> sleep 1 >>> done >>> >>> If I let that run for a while, it will capture several timeouts: >>> >>> ;<<>> DiG 9.7.3<<>> schwer.us +recurse +tcp +short +time=1 +retry=1 >>> @c.ns.sr.sonic.net >>> ;; global options: +cmd >>> ;; connection timed out; no servers could be reached >>> >>> The pdns.log has no significant entries at the times that this occures. I >>> have watched iptraf as I recieve the timeouts, and It dosn't seem that we >>> are hitting our max number of tcp connections (1000). This problem first >>> started in pdns-2.9.22, and continued after the upgrade. None of our other >>> name servers have this problem. >>> >>> What would be the next step in troubleshooting this? Are there any extra >>> logging options I can turn on? Thanks in advance. >> >> Most important to know, of course, is whether the queries even reach pdns. >> Are you in a position to run tcpdump/tshark on c.ns.sr.sonic.net, to monitor >> requests from a test run like the one described above? >> >> Kind regards, >> Peter van Dijk > > > > -- > Grant Keller > > > _______________________________________________ > Pdns-users mailing list > Pdns-users@mailman.powerdns.com > http://mailman.powerdns.com/mailman/listinfo/pdns-users _______________________________________________ Pdns-users mailing list Pdns-users@mailman.powerdns.com http://mailman.powerdns.com/mailman/listinfo/pdns-users
