I didn’t notice this message popping up until I upgraded a couple machines to Lion, however once they were upgraded I began to see this message repeatedly in the log, roughly every 10 seconds.
com.apple.launchd:(com.apple.Kerberos.kdc) Throttling respawn: Will start in 10 seconds
launchd spawns a process that continually attempts to authenticate with resources on the network.
I haven’t done enough digging to know what exactly caused this change. Regenerating the localKDC stopped this message all together so far. You can do that by running this command.
Some people over on the Apple forums have seemed to point out that the launchd rule defined in…
is broke, I haven’t checked any newer installations but I would have to think that this is fixed in Mountain Lion and Mavericks.