In this post, you’ll learn more about the Oracle ErrorTNS-12542: TNS:address already in use with the details on why you receive this error and the possible solution to fix it.
Oracle Error Description
TNS-12542: TNS:address already in use
Reason for the Error TNS-12542: TNS:address already in use
Cause: Specified listener address is already being used.
How to fix the Error TNS-12542: TNS:address already in use ?
You can fix this error in Oracle by following the below steps
Action: Start your listener with a unique address.