My tail -F log shows a lot of activity like this. Is this normal?
2018-02-09 20:45:45.373 [vent.ItemStateChangedEvent] - ntp_ntp_local_dateTime changed from 2018-02-09T20:44:45.347-0500 to 2018-02-09T20:45:45.353-0500
2018-02-09 20:46:45.384 [vent.ItemStateChangedEvent] - ntp_ntp_local_dateTime changed from 2018-02-09T20:45:45.353-0500 to 2018-02-09T20:46:45.359-0500
2018-02-09 20:47:45.395 [vent.ItemStateChangedEvent] - ntp_ntp_local_dateTime changed from 2018-02-09T20:46:45.359-0500 to 2018-02-09T20:47:45.365-0500
2018-02-09 20:48:45.403 [vent.ItemStateChangedEvent] - ntp_ntp_local_dateTime changed from 2018-02-09T20:47:45.365-0500 to 2018-02-09T20:48:45.376-0500
2018-02-09 20:49:45.409 [vent.ItemStateChangedEvent] - ntp_ntp_local_dateTime changed from 2018-02-09T20:48:45.376-0500 to 2018-02-09T20:49:45.387-0500
2018-02-09 20:50:45.424 [vent.ItemStateChangedEvent] - ntp_ntp_local_dateTime changed from 2018-02-09T20:49:45.387-0500 to 2018-02-09T20:50:45.393-0500
2018-02-09 20:51:45.433 [vent.ItemStateChangedEvent] - ntp_ntp_local_dateTime changed from 2018-02-09T20:50:45.393-0500 to 2018-02-09T20:51:45.407-0500
2018-02-09 20:52:45.439 [vent.ItemStateChangedEvent] - ntp_ntp_local_dateTime changed from 2018-02-09T20:51:45.407-0500 to 2018-02-09T20:52:45.413-0500
2018-02-09 20:53:45.451 [vent.ItemStateChangedEvent] - ntp_ntp_local_dateTime changed from 2018-02-09T20:52:45.413-0500 to 2018-02-09T20:53:45.425-0500
2018-02-09 20:54:45.465 [vent.ItemStateChangedEvent] - ntp_ntp_local_dateTime changed from 2018-02-09T20:53:45.425-0500 to 2018-02-09T20:54:45.438-0500
2018-02-09 20:55:45.471 [vent.ItemStateChangedEvent] - ntp_ntp_local_dateTime changed from 2018-02-09T20:54:45.438-0500 to 2018-02-09T20:55:45.444-0500
2018-02-09 20:56:45.474 [vent.ItemStateChangedEvent] - ntp_ntp_local_dateTime changed from 2018-02-09T20:55:45.444-0500 to 2018-02-09T20:56:45.450-0500