In this post, you’ll learn more about the Oracle ErrorORA-12619: TNS:unable to grant requested service with the details on why you receive this error and the possible solution to fix it.
Oracle Error Description
ORA-12619: TNS:unable to grant requested service
Reason for the Error ORA-12619: TNS:unable to grant requested service
The connect request failed because requested service could not be provided by the local TNS software.
How to fix the Error ORA-12619: TNS:unable to grant requested service ?
You can fix this error in Oracle by following the below steps
If appropriate, reexecute with reduced service requirements.