Oracle : Ошибка ORA-16535

"Oracle Restart or Oracle Clusterware prevented completion of broker operation"
*Cause: The broker could not complete the operation because Oracle Restart
(for single instance databases) or Oracle Clusterware (for RAC
databases) could not stop services or instances on this database.
*Action: Check the Data Guard broker log file for more information and
stop the appropriate services or instances using SRVCTL. Then
retry the broker operation.

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