I've run into a problem with named and timeouts primarily with MX
lookups. When a MX query fails the first time, i have to restart the
named process before it will return a successful query. Again, its
mainly with MX lookups but it also happens with A records as well. The
problem subsides for 1-2 hours and starts happening again - basically i
look in the mailq for deferred messages with MX lookup failures.
This box is a Gentoo install running a medium volume (500K per day) mail
server - lots of dns queries due to rbl's, spamassassin, etc. This
problem started showing up around mid-may. Since then, i have
re-installed bind and bind-tools several times, updated the kernel,
linux headers to 2.6.29, recompiled glibc, etc....
I just updated to 9.6.0-P1 from 9.4.3-P2 - same problem exists. When
doing a manual MX lookup (dig MX isc.org) - it takes around 45 seconds
on the first attempt. If it fails the first time, it will never return
a positive query, just "connection timed out; no servers could be
reached" until i restart named. I can't say for sure but the bind
application was updated around the time i noticed this problem. All
versions of bind i have tried (in gentoo portage) have the same problem.
Can anyone help me find where this problem might be? I've google'd
until my eyes are red and throbbing.
Thanks
Vernon
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