Monthly Archives: January 2026

Fixing ORA-12514: Listener Does Not Know of Service (Oracle EBS CDB/PDB)

Posted on 5 January 2026 by syedraheeldba.com

The application was down, and a quick SQL*Plus connection was supposed to confirm the database status. Instead of a clean sqlplus login prompt, the screen flashed an error: ORA-12514: TNS: Listener does not currently know of service requested in connect … Continue reading →