[Pdns-users] Powerdns stops slaving

[Nick Douma]

Hi,

We have a production setup using PowerDNS 3.0-1 static. We're using a
hidden master setup, with three public facing auth servers which
actually serve the data. The hidden master is responsible for slaving
zones from remote masters, and contains the master MySQL db which is
synced to the three public servers using native replication mode.

It occurs that, after an interval I have not yet determined, the pdns
auth server stops slaving. All the usual slaving output (and normal
output) to /var/log/syslog stops, and pdns stops responding to manual
slave update requests using `pdns_control retrieve`. The only fix for
this is restarting powerdns.

For now I have added a monitoring check which generates a monitoring
failure if no powerdns output is detected in syslog for two hours.
However, I would like to understand why this is happening.

As said, the server which is experiencing the problem is running
pdns-static 3.0-1, downloaded from the website some time ago. We're
running in non-dnssec mode, with the appropriate older db schema. The
host system is a physical server running Ubuntu 10.04 LTS with
2.6.32-34-server x64 kernel. MySQL version is 5.1.63-0ubuntu0.10.04.1,
all tables use InnoDB.

Kind regards,

Nick Douma

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