In failure situations, an error is returned to the calling user at the passthrough request.
Backend fails or shuts down
If the backend data server fails or shuts down (all connections are terminated), the next passthrough request fails on the broken connection and an error is returned to the user. The status of passthrough changes to CONNECTION BROKEN and all active connections from the solidDB® server are closed.
To recover:
1 Restart the backend data server.
2 Execute a statement to be passed through.
3 The first passthrough request invokes a new successful connection and the passthrough state changes to CONNECTED.
4 If after the backend failure you set the Passthrough.PassthroughEnabled parameter to no, errors are not returned when statements to be passed through are executed.