ColdFusion · Database exception
What does ORA-12154: TNS Could Not Resolve The Connect Identifier mean in ColdFusion?
The Oracle JDBC driver can't resolve the connection identifier (SID, service name, or TNS alias) configured in the datasource — common after an Oracle RAC failover, a missing Oracle client patch level, or a tnsnames entry that doesn't match what CF is passing. ColdFusion reports it verbatim as [Macromedia][Oracle JDBC Driver][Oracle]ORA-12154.
The Oracle JDBC driver can't resolve the connection identifier (SID, service name, or TNS alias) configured in the datasource — common after an Oracle RAC failover, a missing Oracle client patch level, or a tnsnames entry that doesn't match what CF is passing. ColdFusion reports it verbatim as [Macromedia][Oracle JDBC Driver][Oracle]ORA-12154.
Verify the identifier with sqlplus directly from the ColdFusion host before touching the CF datasource config, and for RAC environments confirm the Oracle client/JDBC driver is patched to a version compatible with the RAC listener setup.