Mssql: Failed To Fetch Info Data (or - No Data For 30m)

Firewalls or network security groups may be blocking the connection on port 1433 or other custom ports.

If the connection reaches the server but fails to authenticate, the fetch will fail. mssql: failed to fetch info data (or no data for 30m)

The most basic cause is a service interruption or blocked communication path. Firewalls or network security groups may be blocking

On Linux-based monitoring agents, the ODBC Driver for SQL Server and mssql-tools must be correctly installed to execute remote queries. mssql: failed to fetch info data (or no data for 30m)

It sounds obvious, but verify the service is actually running.