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Database Startup Fails With Ora-439: feature not enabled: Real Application Clusters (Doc ID 1373499.1)

Last updated on AUGUST 04, 2018

Applies to:

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


Database startup fails with an ORA-439 error.

SQL> Connected to an idle instance.
SQL> ORA-00439: feature not enabled: Real Application Clusters
SQL> Disconnected


After applying a CPU patch, mistakenly ran the following command.

alter system set cluster_database=TRUE scope=spfile;


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