ORAD: Switchover not supported for this configuration.
In an Oracle Data Guard environment, PowerExchange Express CDC for Oracle detected that the database role changed. However, the PowerExchange Express CDC configuration prevents the capture process from switching to the newly active primary database. This problem can occur if the PowerExchange Express CDC configuration file specifies the STANDBY statement or if the thread counts for the standby database and primary database are different.
The PowerExchange Express CDC session ends abnormally.
In the PowerExchange Express CDC configuration file, remove the STANDBY statement if defined and update the RAC MEMBERS statement to reflect the current thread count. For more information about these statements, see the
PowerExchange CDC Guide for Linux, UNIX, and Windows