When creating a database using the DBCA from the General_Pupose.dbc or Data_Warehouse.dbc templates (or from the Seed Database) using the 12.2.0.1 Production SH in Linux and Solaris platform, the following errors in the database alert log are returned:

ORA-12012 , ORA-20001 AND ORA-06512 FROM ORA$AT_OS_OPT_SY_XXX

Platforms : Linux 12.2.0.1 Production SH
            Solaris 12.2.0.1 Production SH

The database alert log contents are:

Errors in file
/u01/app/oracle/diag/rdbms/orcl/ORCL1/trace/ORCL1_j000_73185.trc:
ORA-12012: error on auto execute of job "SYS"."ORA$AT_OS_OPT_SY_936"
ORA-20001: Statistics Advisor: Invalid task name for the current user
ORA-06512: at "SYS.DBMS_STATS", line 47207
ORA-06512: at "SYS.DBMS_STATS_ADVISOR", line 882
ORA-06512: at "SYS.DBMS_STATS_INTERNAL", line 20059
ORA-06512: at "SYS.DBMS_STATS_INTERNAL", line 22201
ORA-06512: at "SYS.DBMS_STATS", line 47197
2017-03-13T00:47:21.394481+00:00

This issue is happening because of the unavailability of the Stats Advisor Tasks from the created database:

SQL> select name, ctime, how_created
from sys.wri$_adv_tasks
where owner_name = 'SYS'
and name in ('AUTO_STATS_ADVISOR_TASK','INDIVIDUAL_STATS_ADVISOR_TASK');  2  
 3    4

Workaround:

Connect to the created database using the SYSDBA privilege and run the following command:

SQL> select name, ctime, how_created
from sys.wri$_adv_tasks
where owner_name = 'SYS'
and name in ('AUTO_STATS_ADVISOR_TASK','INDIVIDUAL_STATS_ADVISOR_TASK');  2  
 3    4  

no rows selected

SQL> EXEC dbms_stats.init_package();

PL/SQL procedure successfully completed.

Now there are rows in these queries:

SQL> select name, ctime, how_created from sys.wri$_adv_tasks where owner_name
= 'SYS' and name in
('AUTO_STATS_ADVISOR_TASK','INDIVIDUAL_STATS_ADVISOR_TASK');

NAME
------------------------------------------------------------------------------


--
CTIME     HOW_CREATED
--------- ------------------------------
AUTO_STATS_ADVISOR_TASK
13-MAR-17 CMD

INDIVIDUAL_STATS_ADVISOR_TASK
13-MAR-17 CMD

Once the Stats Advisor Tasks are available in database, the database alert log no longer has:

ORA-06512 FROM ORA$AT_OS_OPT_SY_XXX

Oracle Database Configuration Assistant (DBCA) incorrectly reports a failure with the following error message when you are creating a version earlier than Oracle Database 12c Release 2 (12.2.0.1) of a pluggable database (PDB) in a multitenant container database (CDB):

ORA-65107: Error encountered when processing the current task on instance:1

Workaround:

This error message can be ignored and you may proceed upgrading the PDB.