Clock drift

I keep getting the following message in my appdaemon.log file

2017-02-17 19:52:09.764959 WARNING Scheduler clock skew detected - delta = 3.764897108078003 - resetting
2017-02-17 19:52:09.866586 WARNING Scheduler clock skew detected - delta = 1.133476972579956 - resetting
2017-02-17 19:52:09.967400 WARNING Scheduler clock skew detected - delta = 1.0326650142669678 - resetting

Other than the obvious, what’s the deal?

i missed this one.
but the only time i get this is when my cpu is to busy.