During the upgrade of Oracle from version 11g to 12c (18.104.22.168) , a TNS error occurs and the process cannot be continued.
The error is the following:
TNS-01189: The listener could not authenticate the user
Another possible symptom to the issue is the error 'Listener "LISTENER" already exists.'
- SAP Products based on NetWeaver
- Oracle Database
LISTENER, ADMIN_RESTRICTIONS_LISTENER, TNS, LSNRCTL, 1104, 121, 11.2, 1189, 01189, TNS-1189, authentication , KBA , BC-DB-ORA , Oracle , Problem
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