[Pdns-users] recursor 4.0.4 and SERVFAIL

bitsof info bitsofinfo.g at gmail.com
Mon Sep 10 15:41:28 UTC 2018

Thanks Bert

1. Yes the setting was done via the console on a running server with the
command below

rec_control trace-regex

2. the recursor.conf has "#trace=yes" comented out, but not sure if this
has to be active for the trace-regex to work, doc was not clear on that.

3. The fqdn "api.my.domain.com" is the one listed w/ SERVFAILs (it returns
a CNAME for "some.other.address.domain.com")

4. The logs do show what appears to be pretty detailed info about cache
hits/missies (when trace-regex is on) and the recursion done to fine the
CNAME address etc. But despite failures in clients and SERVFAIL counter
going up for the address, I don't see any errors or anything related to
SERVFAIL ion the logs (looking at var/logs/messages)

5. the recursor.conf has no log level set so I assume the daemon is using
the syslog default *.info and greater. The logs in var log messages give
not severity but I assume the logging is working as I see messages there
just nothing pertaining to SERVFAIL


On Sat, Sep 8, 2018 at 10:16 AM bert hubert <bert.hubert at powerdns.com>

> Dear mr "Bits of Info G" (is it ok if I call you that? you do realise it is
> somewhat rude to show up with an obvious fake name?)
> Can you share your trace-regex setting please?  How did you set it, with
> rec_control?  Can you also check your loglevel, these traces are logged at
> Warning level.
>         Bert
> On Fri, Sep 07, 2018 at 06:10:54PM -0600, bitsofinfo wrote:
> > Hi,
> >
> > Running pdns-recursor 4.0.4
> >
> > In the web interface UI we see many "Servfail Domain" entries listed
> > with counts
> >
> > For some of these names/domains we have set trace-regex from the command
> > line.
> >
> > The issue is that we can find nothing in the logs showing any SERVFAIL
> > errors, but only successful cache hits and lookups yet this number
> > increments.
> >
> > How can we get to the bottom of this or see the reasons and debug
> > information that is generating these SERVFAILs?
> >
> > thanks
> >
> > _______________________________________________
> > Pdns-users mailing list
> > Pdns-users at mailman.powerdns.com
> > https://mailman.powerdns.com/mailman/listinfo/pdns-users
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