In this post, you’ll learn more about the Oracle ErrorORA-12642: No session key with the details on why you receive this error and the possible solution to fix it.
Oracle Error Description
ORA-12642: No session key
Reason for the Error ORA-12642: No session key
A process has no session key associated with it because the authentication service being used does not use one.
How to fix the Error ORA-12642: No session key ?
You can fix this error in Oracle by following the below steps
If a session key is required, use another authentication service.