Oracle® Database 11g / 12c / 18c error codes ORA-32827: Messaging Gateway agent must be shut down

ORA-32827: Messaging Gateway agent must be shut down

Oracle Error Code: ORA-32827

Cause: An operation was attempted that requires the Messaging Gateway agent to be shut down.

Action: Issue SHUTDOWN, wait for MGW_GATEWAY view to show a NOT_STARTED status, and retry the operation. CLEANUP_GATEWAY may need to be issued to reset the gateway state if the agent fails to shut down after a reasonable time period.