This is on a non-ha controller, recently upgraded from 2.7.6 to 2.8.3. But the timestamps show these logs before and after the upgrade:
2020-10-12 22:19:05 ERROR juju.core.raftlease store.go:277 command Command(ver: 1, op: setTime, new time: 0002-10-02 08:39:05.716668447 +0000 UTC): clock was updated concurrently, retry 2020-10-13 04:11:06 ERROR juju.core.raftlease store.go:277 command Command(ver: 1, op: setTime, new time: 0002-10-02 14:22:47.694097189 +0000 UTC): clock was updated concurrently, retry
[...]
2020-10-20 14:39:57 ERROR juju.core.raftlease store.go:277 command Command(ver: 1, op: setTime, new time: 0001-01-01 00:00:01.015763373 +0000 UTC): clock was updated concurrently, retry
This is on a non-ha controller, recently upgraded from 2.7.6 to 2.8.3. But the timestamps show these logs before and after the upgrade:
2020-10-12 22:19:05 ERROR juju.core.raftlease store.go:277 command Command(ver: 1, op: setTime, new time: 0002-10-02 08:39:05.716668447 +0000 UTC): clock was updated concurrently, retry
2020-10-13 04:11:06 ERROR juju.core.raftlease store.go:277 command Command(ver: 1, op: setTime, new time: 0002-10-02 14:22:47.694097189 +0000 UTC): clock was updated concurrently, retry
[...]
2020-10-20 14:39:57 ERROR juju.core.raftlease store.go:277 command Command(ver: 1, op: setTime, new time: 0001-01-01 00:00:01.015763373 +0000 UTC): clock was updated concurrently, retry