If you suspect a Java environment issue, write a small Java program on the Cognos server that uses the same JDBC driver and URL. This isolates Cognos framework problems.
If your database enforces SSL, the JDBC URL must include SSL parameters. For PostgreSQL: If you suspect a Java environment issue, write
For further investigation, check the cogserver.log file in your Cognos installation logs directory for a more detailed stack trace. A typo in the connection string is a
Short connection timeouts (e.g., connectTimeout=5000 ms) may cause the application to give up before the server can respond, especially under heavy load or high latency. For PostgreSQL: For further investigation
If telnet succeeds (you see a blank screen or a database banner), the network layer is fine – move to the next step.
A typo in the connection string is a frequent cause of the xqe-jdb-0001 error. Go to your Data Source properties in Cognos (or your specific application) and check the connection string.