When creating a backup of the Tableau Server Repository using tsm maintenance backup -po -f <filename> on a multi-node cluster with no File Store or Repository on the Tabadmincontroller node, the job returns the below error message, and no .tsbak is created:
"An error occurred on the server generating the backup."
Alternatively, when upgrading a Tableau Server from v2018.3 to v2019.2 with this configuration, the upgrade will not complete, with the following output:
61% - Uninstalling backup services.
Repository backup failed.
An error occurred during installation.
An error occurred during repository backup.
However, creating a full backup using tsm maintenance backup -f <filename> still works as expected.