PROBLEM
When working with ArcGIS Data Store, the standby machine does not automatically replicate the primary Data Store. Additionally, a notification may be returned indicating "Incomplete startup packet".
Communication between the primary and standby data store cannot be established. For example, the data stores are attempting to establish a connection with each other through port 9876, but the port is not available.
The notification is often returned if a client machine makes a connection to the database server, but sends no traffic. The client machine intermittently checks if a connection can be established with the database server using the defined ports.
Remove the standby data store from the server site where the data store is hosted, and re-register the standby data store.
Note: To start or stop a data store service, refer to ArcGIS Help: ArcGIS Data Store REST commands.
C:\arcgisdatastoreOr​, if ArcGIS Enterprise Builder was used to install the data store (available from version 10.5.1):
C:\arcgis\arcgisdatastore
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