In this post, you’ll learn more about the Oracle ErrorPGA-21451: SNA Server is shutting down with the details on why you receive this error and the possible solution to fix it.
Oracle Error Description
PGA-21451: SNA Server is shutting down
Reason for the Error PGA-21451: SNA Server is shutting down
Cause: SNA Server is being shut down and sent a SIGUSR1 to the RRM.
How to fix the Error PGA-21451: SNA Server is shutting down ?
You can fix this error in Oracle by following the below steps
Action: The RRM must terminate when this occurs. Contact the system administrator to determine the cause of the SNA Server shutdown. Restart the RRM after SNA Server has been restarted.