NSD 3: slave too agressive

Wouter Wijngaards wouter at NLnetLabs.nl
Fri Jan 12 09:36:12 CET 2007


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Hi,

I've fixed it, so that for secondary zones without any data, it will do
exponential backoff from about 10 seconds to about 4 hours maximum. It
is randomized to approximately those numbers.

For zones that have content (thus SOA) or had ever had content, the
retry value from the SOA is used. Without exponential backoff - as per
the specs in rfc1034.

The fix is slated for 3.0.4.

Best regards,
   Wouter

Paul Wouters wrote:
> On Sat, 16 Dec 2006, Stephane Bortzmeyer wrote:
> 
>> I test NSD on a machine which is secondary for ~ 500 zones, many of
>> them lame (for instance, the master no longer replies).
>>
>> When it occurs, nsd keeps asking and asking again and logs every
>> attempt:
>>
>> [1166301627] nsd[21603]: error: xfrd: zone 202.16.192.in-addr.arpa received error code REFUSED from 137.39.1.3
> 
>> Three requests, every ten seconds, and it does not stop even after
>> several hours! Is it normal?
> 
> Unfortunately yes. NSD handles missing secondaries/primaries pretty badly. I was
> hoping nsd3, which i haven't tested yet, would handle this better.
> 
> Paul
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> nsd-users at NLnetLabs.nl
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