[Pdns-users] Pdns-recursor non-responsive after running dnscheck script

Peter van Dijk peter.van.dijk at netherlabs.nl
Thu Feb 9 09:50:50 UTC 2012

Hello Judith,

On Feb 8, 2012, at 14:57 , Judith Mink wrote:

> For checking our domains we try to use the dnscheck tool by iis.se. When we run it against our authoritive nameservers it runs fine. But when we run it against our recursor, things go terribly wrong. The dnscheck script just runs on, without noticeable problems, but, resolving domains on the recursor fails. The recursor responds with serv fail, and even nxdomain. A restart is necessary to get it op and running again.
> I increased the values for the number of mthreads, threads, and stack size per mthread . Also Although it does seem to help; it does take longer for the server to fail. But it doesn’t fix it.
> As I understand the only thing the dnscheck script does is run dig, nothing funny.
> We run the powerdns recursor, version 3.3 on a 64  bit Centos (6.0) OS, for our authoritive nameservers we run version 2.9.22 on a 32 bit (5.6) OS.
> Is this a bug, or am I missing something here?

It was a bug! We believe it is fixed in SVN revision http://wiki.powerdns.com/trac/changeset/2380

Kind regards,
Peter van Dijk

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