While the message specifically mentions “please check the database server,” the root cause often lies somewhere between the application server and the database—or even within the application’s own configuration.
Confirm the database server is listening on the expected port (e.g., 1433 for SQL Server) and that no firewall is blocking the traffic.
Ensure the JDBC connection string is formatted correctly for the database type. While the message specifically mentions “please check the
Open the data source configuration in your BI tool or application properties file.
Let’s break down what this error means, why it happens, and—most importantly—how to fix it. Open the data source configuration in your BI
Verify if the connection string was updated to use an if the database requires it.
: Confirm the database server is running and accessible from the Cognos application server using a standard ping or a native database tool. : Confirm the database server is running and
To verify the database server status, perform the following: