Hi Marcello, It looks like this is the same issue which I reported already:
https://github.com/PowerDNS/pdns/issues/9112 Maybe you can report your observations there as well. Winfried Am 28. Dezember 2020 21:41:21 MEZ schrieb Marcello Lupo via Pdns-users <pdns-users@mailman.powerdns.com>: >Hello, >I have configured a PDNS Authoritative server (v 4.4.0) with many slave >zones provisioned with superslave and supermasters mechanism. >At the moment I have around 1400 zones provisioned from 5 bind master >servers. > >I’m getting a lot of: > >Dec 28 21:00:02 pdns-db2 pdns_server-global[6838]: Received serial >number updates for 374 zones, had 19 timeouts >Dec 28 21:05:23 pdns-db2 pdns_server-global[6838]: Received serial >number updates for 395 zones, had 47 timeouts >Dec 28 21:06:34 pdns-db2 pdns_server-global[6838]: Received serial >number updates for 303 zones, had 15 timeouts >Dec 28 21:16:07 pdns-db2 pdns_server-global[6838]: Received serial >number updates for 394 zones, had 43 timeouts >Dec 28 21:21:25 pdns-db2 pdns_server-global[6838]: Received serial >number updates for 599 zones, had 66 timeouts >Dec 28 21:22:41 pdns-db2 pdns_server-global[6838]: Received serial >number updates for 521 zones, had 22 timeouts >Dec 28 21:26:56 pdns-db2 pdns_server-global[6838]: Received serial >number updates for 455 zones, had 28 timeouts >Dec 28 21:28:08 pdns-db2 pdns_server-global[6838]: Received serial >number updates for 235 zones, had 26 timeouts > >I checked with tcpdump on both the master DNS and the powerdns itself >and all answers to the AXFR requests starting from pdns server are >correctly received on the pdns server but seems that are not handled by >the system and give the timeout error. The udp-in-errors counter is >raising every time of the exact number of the timeouts received. As the >documentation says the udp-in-errors value seems to be related to >packet received but cannot be handled from the pdns server itself. >I’m almost sure that it is a problem of resource tuning but I haven’t >idea of what I should tune to avoid this behavior. >In the short future we will need to reach around 15k domains managed by >this DNS server and I would like to do not have this issue. >In my scenario this server is dedicated only to the provisioning of >domains and it do not answer to requests coming from internet. Requests >coming from internet are handled from many servers balanced that rely >on the mariadb replication of the PDNS DB main server. >Do you have any ideas? >Thank you >Bye >Marcello >_______________________________________________ >Pdns-users mailing list >Pdns-users@mailman.powerdns.com >https://mailman.powerdns.com/mailman/listinfo/pdns-users
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