[Xymon] Odd named errors, perhaps related to Xymon or Devmon?

[Berkley, Simeon]

We've been getting an average of 40+/day of these messages from the
caching nameserver process on one of our Xymon/Devmon servers:

 named[N]: sockmgr 0xN: maximum number of FD events (64) received

This server is running bind-9.3.6-16.P1 (old, I know, but it's the
latest for the distro we are using). I was wondering if anyone else
out there was seeing the same errors? I'm making an assumption that
Xymon/Devmon (or one of our ext scripts) might be inducing this
condition, since this server doesn't have any other processes on it
that would be doing a large amount of DNS lookups. This server has
over 600 entries in hosts.cfg and 92 entries in the Devmon hosts.db. I
have tried reproducing the problem by making a large amount of DNS
lookups as simultaneously as possible, but with no luck. The xymonnet
status only lists 42 failed DNS lookups out of 797 calls to
dnsresolve. Any suggestions on how to find out what specific process
is causing named to make periodic high demands for sockets?

-- 
S i m e o n  B e r k l e y

Systems Engineer
McClatchy Interactive
phone:  919-861-1244
fax:    919-861-1300
mobile: 919-302-3063
e-mail: sberkley at mcclatchyinteractive.com
AIM:    sberkleymi
www.mcclatchyinteractive.com