My Oracle Support Banner

EM Cloud Control Connection to PDB fails with Error: ORA-12523, TNS:listener could not find instance appropriate for the client connection (Doc ID 2124711.1)

Last updated on MARCH 08, 2017

Applies to:

Enterprise Manager for Oracle Database - Version and later
Information in this document applies to any platform.


EM connects to Container database successfully.
But connection to Pluggable database fails with following error:


- If SID is kept as, the connection to CDB works but connection to PDB fails. 

- If SID is kept as cddbp, the connection to PDB works but connection to CDB fails


To view full details, sign in with your My Oracle Support account.

Don't have a My Oracle Support account? Click to get started!

In this Document

This document is being delivered to you via Oracle Support's Rapid Visibility (RaV) process and therefore has not been subject to an independent technical review.
My Oracle Support provides customers with access to over a million knowledge articles and a vibrant support community of peers and Oracle experts.