Comment 5 for bug 1874939

I redid the whole upgrade:
* do-release-upgrade and finished without reboot (all 4 nodes)
** so ceph daemons should not have been restarted
* restarted all ceph mons sequentially
** verified I get octopus as min mon release
* restarted all ceph-mgrs sequentially
** verified that all ceph-mgr daemons are running
* restarted all OSDs
** OSDs show
"2020-04-29T16:25:52.132-0700 7f43d2788700 1 osd.4 16945 tick checking mon for new map"
* All the logs are full of failed futex requests (connection timed out / unfinished'