BIND 9.16.25 "file descriptor exceeds limit" messages

[Petr Špaček]

On 28. 01. 22 16:28, Tony Finch wrote:
> Anand Buddhdev <anandb at ripe.net> wrote:
>>
>> The server has many IP addresses. In named.conf, there are 129 IPv6 addresses
>> in the "listen-on-v6" option and 128 IPv4 addresses in the "listen-on" option.
>> The server begins running, but then repeatedly emits this log:
>>
>> general: error: socket: file descriptor exceeds limit (46474/21000)
> 
> Hmm, (128+129)*88*2 == 45232, (2 == UDP + TCP) so the big number looks
> plausible.
> 
> The 21000 limit comes from a hardcoded value for ISC_SOCKET_MAXSOCKETS.
> 
> You can adjust -U (number of listeners) on the command line to avoid
> hitting the fixed MAXSOCKETS limit, and leave -n (max sockets) unset, at
> its default. You can also set ISC_SOCKET_MAXSOCKETS at build time, if you
> can work out how to wrangle the build system :-)

Or go for 9.18.0 which does not have this limit anymore.

-- 
Petr Špaček  @  Internet Systems Consortium