[Pdns-users] NOTIFY response timeout value? (repeat NOTIFY slave error)

Remi Gacogne remi.gacogne at powerdns.com
Tue Dec 11 16:03:48 UTC 2018

On 12/7/18 6:10 PM, MRob wrote:
> NOTIFY 3sec timeout is hardcoded? ANyone please confirm?

At a quick glance, it looks like the first attempt has a 3s timeout, the
second one 5s, the third one 9s and the last one 17s:


I did not actually test, though.

Best regards,


> On 2018-12-05 18:43, MRob wrote:
>> Hello, when supermaster send NOTIFY for large number of domain I think
>> some NOTIFYs get re-sent. On first time slave setup that cause errors
>> so I was looking do pdns have setting to delay re-NOTIFY timeout?
>> Loglevel 6 doesnt say "no response so I will re-notify" however I see
>> hint of two notify response in master:
>> 01:19:53 Queued notification of domain 'example.org' to
>> 01:19:57 Removed from notification list: 'example.org' to
>> (was acknowledged)
>> 01:20:13 Received spurious notify answer for 'example.org' from
>> 01:20:31 AXFR happen successfully
>> 01:20:45 Received unsuccessful notification report for 'example.org'
>> from, error: Server Failure
>> 01:20:45 Received spurious notify answer for 'example.org' from
>> Slave show in logs 2 NOTIFY, notice time of number 2 is 1sec before
>> than which master said "removed from notify list (acknowledged)":
>> 01:19:54 Received NOTIFY for example.org from for which we are
>> not authoritative
>> 01:19:56 Received NOTIFY for example.org from for which we are
>> not authoritative
>> 01:20:13 Created new slave zone 'example.org' from supermaster
>> 01:20:31 AXFR happen successfully
>> 01:20:44 Database error trying to create example.org for potential
>> supermaster Database error trying to insert new domain
>> 'example.org.': Could not execute mysql statement: insert into domains
>> (type,name,master,account,last_check,notified_serial)
>> values(?,?,?,?,NULL,NULL): Duplicate entry 'example.org' for key
>> 'name_index'
>> So I guess master wait 3sec for NOTIFY acknowledge then send
>> re-NOTIFY. On slave setup causing database error. Look like operation
>> is normal after so I can ignore but I wonder if there may be setting
>> to increase timeout?
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Remi Gacogne
PowerDNS.COM BV - https://www.powerdns.com/

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