Attempt to configure data store failed. Connection timed out while waiting for relational data store machine to start in ArcGIS Data Store

Error Message

During an attempt to upgrade ArcGIS Data Store, the process fails, and the following error message is returned:

Error: 
Attempt to configure data store failed. Connection timed out while waiting for relational data store machine to start.

Cause

The ArcGIS Data Store service is unable to start due to a corrupted configuration directory or residual files from a previous upgrade attempt. This condition causes the relational data store to become unresponsive during initialization.

Solution or Workaround

1. Sign in to the machine hosting the ArcGIS Data Store.
2. Type Services in the Windows search bar and click the Services icon. In the Services window, navigate to the ArcGIS Data Store service and click Stop.
3. In ArcGIS Server Manager, navigate to Site > Data Stores and click Unregister on the data store with the 'Relational' type.
4. Navigate to the installation directory on the machine and rename the arcgisdatastore folder to arcgisdatastore_old. The installation directory is located in:

C:\arcgisdatastore

5. In the Services window, navigate to the ArcGIS Data Store service and click Restart.
6. Type Command Prompt in the Windows search box, right-click Command Prompt and click Run as administrator.
7. In the Command Prompt window, change the directory to restore the relational data store, as shown below, and press Enter. For more information, refer to How To: Restore ArcGIS Data Store.

restoredatastore --store relational --target most-recent --source-loc \\myserver\backups\spatiotemporal --data-dir C:\arcgisdatastore --server-url https://gisserver.domain.com:6443 --server-admin siteadmin --server-password MySApw

8. Attempt the data store upgrade.