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ORA-12520: Listeners Running on VIP Address in 10g or Newer RAC (Doc ID 342419.1)

Last updated on MARCH 31, 2022

Applies to:

Oracle Net Services - Version to [Release 10.1 to 11.1]
Information in this document applies to any platform.

This issue is limited to 10g through The issue described here is fixed in 11.2.


The REMOTE_LISTENER parameter is set to an alias which is defined in the Tnsnames.ora file on both the nodes.

In the Tnsnames.ora file , the hostname is defined with proper domain name.

The IP / VIP and hostname are properly defined in the /etc/hosts file on both nodes.

On the server when trying to log on to database using SQL*Plus, you see the following error:



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