On Wed, 2019-07-03 at 23:51 +0000, Sam Gilson wrote: > My hypothesis is that is that our service loops for a long time (30 > min usually) while waiting for a new DHCP lease to come in, and once > that is completed, a time sync w/NTP occurs which causes the > ExecMainStartTimestamp to be rewritten. Why I think this is the case I do not believe NTP time changes are relevant. Try checking the journal to see if something triggers the start of a process belonging to the service at the time the timestamp is reset. Enabling debug logging for systemd might help if you don't see anything at normal level. _______________________________________________ systemd-devel mailing list systemd-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/systemd-devel