Been upgrading a base installation of ArcGIS Enterprise from 10.7.1 to 10.8. Everything was going great until I tried to upgrade the Datastore component - which has both a Relational Datastore as well as a Spatio-temporal Datastore. The relational store seems to be running ok but the Spatio-temporal store failed with the following error:
Attempt to configure data store failed. Caused by: HTTP GET request '/_cluster/health?wait_for_status=yellow&timeout=5m' failed. Code 503.
Any ideas what the issue could be?