On Thu, Feb 24, 2011 at 01:20:13PM -0500, Charles Sprickman wrote: > Howdy, > > I'm seeing an issue with tcp queries on powerdns recursor 3.2. We run two > instances of pdns recursor on an internal network and it's mainly hit by > lots of qmail delivery servers. They are doing a ton of lookups, I think > we peak around 4000 queries/second. With more people using dnssec, many > providers returning insanely huge lists of mxers, and qmail's propensity > for "any" queries, we're finding that our tcp queries are going way up. > > What we are seeing is that when "max-tcp-clients" is exceeded, it appears > that pdns is not properly closing sockets. We then get a pile-up of > qmail-remotes that are "stuck" and deliveries stop until pdns is restarted. > netstat shows the connections in state "CLOSED". > > We're running FreeBSD 8.1 on all the hosts involved. This mailing list > post is interesting, and explains why these "CLOSED" sockets are in that > state: > > http://lists.freebsd.org/pipermail/freebsd-net/2008-June/018544.html > > Any pointers on how to troubleshoot this further? > > Thanks, > > Charles
There is not much to troubleshoot. This is a known bug. Try running the latest release instead. They really do fix bugs. :) Cheers, Ken _______________________________________________ Pdns-users mailing list [email protected] http://mailman.powerdns.com/mailman/listinfo/pdns-users
