Getting beyond 10k qps?

Using rsntp, has anybody seen EINVAL/os error 22 errors? I get anywhere from 4-12 / hour, eg:

Jun 14 21:32:11 minime rsntp[6490]: Thread #2 failed to send packet: Invalid argument (os error 22)
Jun 14 21:32:31 minime rsntp[6490]: Thread #2 failed to send packet: Invalid argument (os error 22)
Jun 14 21:52:20 minime rsntp[6490]: Thread #2 failed to send packet: Invalid argument (os error 22)
Jun 14 21:52:40 minime rsntp[6490]: Thread #2 failed to send packet: Invalid argument (os error 22)
Jun 14 22:22:12 minime rsntp[6490]: Thread #2 failed to send packet: Invalid argument (os error 22)
Jun 14 22:22:12 minime rsntp[6490]: Thread #2 failed to send packet: Invalid argument (os error 22)
Jun 14 22:54:01 minime rsntp[6490]: Thread #2 failed to send packet: Invalid argument (os error 22)
Jun 14 22:54:21 minime rsntp[6490]: Thread #2 failed to send packet: Invalid argument (os error 22)
Jun 14 23:05:21 minime rsntp[6490]: Thread #1 failed to send packet: Invalid argument (os error 22)
Jun 15 00:10:39 minime rsntp[6490]: Thread #3 failed to send packet: Invalid argument (os error 22)

Everything seems to be working okay, so I’m trying to figure out if it’s a bad/bonus source IP in a packet or if for some reason some of the time data in the buffer is wrong… I’m guessing IP…