So, I start seeing on my alert log:
2019-12-26T00:42:03.543268-05:00 Errors in file /u01/app/oracle/diag/rdbms/cdb1/CDB1/trace/CDB1_j000_89793.trc: ORA-12012: error on auto execute of job "SYS"."ORA$AT_OS_OPT_SY_36807" ORA-20001: Statistics Advisor: Invalid task name for the current user ORA-06512: at "SYS.DBMS_STATS", line 47207 ORA-06512: at "SYS.DBMS_STATS_ADVISOR", line 882 ORA-06512: at "SYS.DBMS_STATS_INTERNAL", line 20059 ORA-06512: at "SYS.DBMS_STATS_INTERNAL", line 22201 ORA-06512: at "SYS.DBMS_STATS", line 47197
After some research I found Bug 22879263 – BETA 12.2 – ORA-12012 , ORA-20001 AND ORA-06512 FROM ORA$AT_OS_OPT_SY_88 JOB.
This was suppose to be fixed on 184.108.40.206, however I’m still getting. Anyway, I executed the below and it got fixed:
Ref: Recurring ORA-12012, ORA-20001, ORA-06512 In Container Database (Doc ID 2420581.1)
Hope it helps!