Unable to sign into active database AS SYSDBA after applying Patch 30502041
On our 12.1.0.2 database, Non RAC, stand alone server:
After installing the Jan 2020 patch 30502041 for OJVM, and executing datapatch, attempting to sign into the database using SQLPLUS / AS SYSDBA returns the error ORA-12545: Connect failed because target host or object does not exist.
I am able to connect in this way if the database is idle (i.e. when starting in Upgrade mode).
if I attempt CONNECT / AS SYSDBA from within SQLPLUS the following error appears: ORA-01017: invalid username/password; logon denied
I am very new to DBA functions so please keep language in any answers simple.
Thank you