In this post, you’ll learn more about the Oracle ErrorORA-09756: osnpns: no port in the name server. with the details on why you receive this error and the possible solution to fix it.
Oracle Error Description
ORA-09756: osnpns: no port in the name server.
Reason for the Error ORA-09756: osnpns: no port in the name server.
osnpns could not find the given named port in the name server.
How to fix the Error ORA-09756: osnpns: no port in the name server. ?
You can fix this error in Oracle by following the below steps
Check the error code in sercerrno. Make sure the shadow process and network name server are still running.