setsockopt log messages

[Anne-Marie Collins]

What are these messages indicating?

   02:11:40 named: setsockopt(rfd, KEEPALIVE): Invalid argument

   11:09:35 named: setsockopt(rfd, SO_SNDBUF, 16384): Invalid argument
            [message repeated 2 times until 22:11:04]

This is named 8.2.2-P5 on Solaris 2.6.

thanks,
  anne-marie