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

[MRob]

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 2.2.2.2:53
01:19:57 Removed from notification list: 'example.org' to 2.2.2.2:53 
(was acknowledged)
01:20:13 Received spurious notify answer for 'example.org' from 
2.2.2.2:53
01:20:31 AXFR happen successfully
01:20:45 Received unsuccessful notification report for 'example.org' 
from 2.2.2.2:53, error: Server Failure
01:20:45 Received spurious notify answer for 'example.org' from 
2.2.2.2:53

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 1.1.1.1 for which we are 
not authoritative
01:19:56 Received NOTIFY for example.org from 1.1.1.1 for which we are 
not authoritative
01:20:13 Created new slave zone 'example.org' from supermaster 1.1.1.1
01:20:31 AXFR happen successfully
01:20:44 Database error trying to create example.org for potential 
supermaster 1.1.1.1: 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?