XQE-JDB-0001

The error in IBM Cognos is a generic "Problem establishing connection" message that typically indicates the Cognos Query Service is unable to communicate with your target database server using a JDBC driver.

But sometimes, late at night, when the wind rattled the data center windows, she’d pull up the old logs and stare at the timestamps. Those seven failed connections from 02:41. They all came from a server that had been decommissioned six months ago. A server whose MAC address she’d never seen before that night. A server whose hostname, according to the archived inventory, was xqe-jdb-0001 .

• Review client connection timeouts, pool max wait, and retry policies.