How to fix the Oracle error TNS-01106: Listener using listener name string has already been started?

In this post, you’ll learn more about the Oracle ErrorTNS-01106: Listener using listener name string has already been started with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

TNS-01106: Listener using listener name string has already been started

Reason for the Error TNS-01106: Listener using listener name string has already been started

Cause: Another listener is already listening on one of the ADDRESSes specified.

How to fix the Error TNS-01106: Listener using listener name string has already been started ?

You can fix this error in Oracle by following the below steps

Action: Shutdown the previous listener specified by the listener name before starting this one.