Comment 2 for bug 1907202

I ran into this whilst doing charm-upgrades from stable->next for 21.01 testing. It's possible that during the upgrade all the units got restarted which means that the cluster went US. I'll do some further testing to verify.

In order to get this back, I needed to run:

cluster = dba.reboot_cluster_from_complete_outage()

from the mysqlsh utility (after connection). Then the database came back.

Note. the LC_ALL was a red-herring; it doesn't affect operations, it just generates the error message.