72003: LiveSync connector cannot reach the database

A LiveSync database connector could not establish a connection to the database it reads from. This often points to the database being unreachable, or to incorrect connection details or credentials in the connector configuration.

What you should do

Check that the database is running and reachable from Ably, and that the connection details and credentials in the connector's configuration are correct. This includes the host and port, and any network or firewall rules that must allow Ably to connect.

Why it happens

The connector could not open a connection to the database it reads from. Common causes are the database being down or unreachable, network or firewall rules blocking Ably, or incorrect connection details or credentials in the configuration.

What you'll see

The error is reported with code 72003 and HTTP status 500. The message is of the form unable to connect to database: <detail> or unable to start change stream: <detail>.