Cola Stack:
C=Coldfusion (11)
O=Oracle (12c)
L=Linux (Oracle Linux 6.5)
A=Apache (HTTPD 2.2.x)

This error is annoying me:
Connection verification failed for data source: voucher
java.sql.SQLNonTransientConnectionException: [macromedia][Oracle JDBC Driver]Error establishing socket to host and port: localhost:1521. Reason: Connection refused
The root cause was that: java.sql.SQLNonTransientConnectionException: [macromedia][Oracle JDBC Driver]Error establishing socket to host and port: localhost:1521. Reason: Connection refused

Oracle 12c
Container = orcl
Pluggable = pdb1

I can log into sqlplus using user@pdb1. The service name is working. How do you translate the service name to Coldfusion 11?