Package: pdns-server
Version: 2.9.20-5
Severity: normal

I have server B slave a bunch of zones from server A, and every 1-2
days, server B will complain:

  Error trying to retrieve/refresh 'my.zone.net': Timeout waiting
  for answer

I just captured what's going on on A and B at the time with tcpdump:

B:
  IP 82.197.162.59.14354 > 213.203.238.82.53:  38606 SOA? debian-system.info. 
(36)
  IP 82.197.162.59.19421 > 213.203.238.82.53:  53145 SOA? debian-system.info. 
(36)
  IP 213.203.238.82.53 > 82.197.162.59.19421:  53145*- 1/0/0 SOA[|domain] 

A:
  IP 82.197.162.59.14354 > 213.203.238.82.53:  38606 SOA? debian-system.info. 
(36)
  IP 213.203.238.82.53 > 82.197.162.59.14354:  38606*- 1/0/0 SOA[|domain]
  IP 82.197.162.59.19421 > 213.203.238.82.53:  53145 SOA? debian-system.info. 
(36)
  IP 213.203.238.82.53 > 82.197.162.59.19421:  53145*- 1/0/0 SOA[|domain]

As you can see from the query IDs, B sent a query, A answered, but
B did not get this answer (it's UDP after all...). B sends another
request two seconds later, which A again answers; this time, the
answer arrives.

Nevertheless, B has written the above warning to the logs.

I would suggest that it did not write this warning until 2-3 retries
have failed. As it stands, I got the warning but the
retrieve/refresh did actually work.

-- System Information:
Debian Release: 4.0
  APT prefers unstable
  APT policy: (500, 'unstable'), (500, 'testing'), (1, 'experimental')
Architecture: amd64 (x86_64)
Shell:  /bin/sh linked to /bin/dash
Kernel: Linux 2.6.17-2-amd64
Locale: LANG=en_GB, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8)

-- 
 .''`.   martin f. krafft <[EMAIL PROTECTED]>
: :'  :  proud Debian developer, author, administrator, and user
`. `'`   http://people.debian.org/~madduck - http://debiansystem.info
  `-  Debian - when you have better things to do than fixing systems

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