RCU-6080:Global prerequisite check failed – The selected Oracle database is a multitenant container database (CDB).

Issue:-Error faced while installing 12C RCU

Error:-RCU-6080:Global prerequisite check failed – Check requirement for specified database

          The selected Oracle database is a multitenant container database (CDB). 

          Connecting to a multitenant container database (CDB) is not supported. 

          Instead, connect to a valid pluggble database (PDB)

Solution 1:-

1.) Check where are your PDB installed(below my example):

SQL> select name from v$services;

NAME

pdborcl

weblogicXDB

weblogic

SYS$BACKGROUND

SYS$USERS

2) Alter your database:

 SQL> alter pluggable database all open;

 3) Insert the correct service name. On my case, is pdborcl:

      Try to re run RCU

Or

Solution 2:-

Note:- Make sure you are entering correct SID.

when i installed oracle database 12c i left global database name as default (orcl) and during  RCU run, i was entering global database name at the place of SID information.

Then i re-installed database and changed my global database name same as SID and re-run RCU,it was successful.

if u see above error make sure you are entering correct database information when running RCU

Thanks,

Aditya.