Version: 1:9.5.1.dfsg.P1-2 Hi,
Just suffered the same problem! It sounds pretty nasty if you run a
busy nameserver or just set a low cache size to restrict memory usage.
I had max-cache-size 1m; which I think triggers the problem sooner.
My best guess is that the cache becomes exhausted after several
hours/days of running; old entries are purged from the cache, but
unfortunately this includes the root hints. Is that a bug or
misconfiguration on my part? It causes recursive queries to fail,
although answers are still given from authoritative zones.
My configuration is a little complicated: split-horizon with
internal/external views, but only the internal view allows recursion and
that's where I had problems.
Relevant global options:
options {
// ...
max-cache-size 1m;
recursive-clients 256;
};
Internal view options:
view "internal" {
match-clients { 192.168.0.0/16; 127.0.0.1/16; };
recursion yes;
notify no;
// prime the server with knowledge of the root servers
zone "." {
type hint;
file "/etc/bind/db.root";
};
// ...
};
My root hints file was the 2008020400-serial that shipped with the
Debian package, but I'll be updating that now.
My workaround will be to set max-cache-size unlimited; for the time being.
Regards,
--
Steven Chamberlain
ste...@pyro.eu.org
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