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ORA-12504 When connecting using UCP to Single Instance Databases (Doc ID 2774602.1)

Last updated on AUGUST 09, 2023

Applies to:

Universal Connection Pool - Version 18.11 and later
Information in this document applies to any platform.


Application using JDBC and UCP version 18c fails to connect due to error: ORA-12504, TNS:listener was not given the SID in CONNECT_DATA

This issue is specific to using UCP and specific to single instance databases  ( It does not happen on RAC databases)

sample stack:




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