DBUA 12.2 Failed while PDBS Recompile Invalid Objects

When upgrading 12.1 database to 12.2 with DBUA, got following error,

Server errors encountered during the execution of "PDBS Recompile Invalid Objects".

Following information is found in DBUA log file,

SQL> EXECUTE dbms_registry_sys.validate_components;
...(20:04:27) Starting validate_apex for APEX_180200
ORA-20001: MISSING GRANT: grant execute on "MDSYS"."SDO_DIM_ARRAY" to APEX_180200
ORA-20001: MISSING GRANT: grant execute on "MDSYS"."SDO_DIM_ELEMENT" to APEX_180200
ORA-20001: MISSING GRANT: grant execute on "MDSYS"."SDO_ELEM_INFO_ARRAY" to APEX_180200
ORA-20001: MISSING GRANT: grant execute on "MDSYS"."SDO_GEOMETRY" to APEX_180200
ORA-20001: MISSING GRANT: grant execute on "MDSYS"."SDO_ORDINATE_ARRAY" to APEX_180200
ORA-20001: MISSING GRANT: grant execute on "MDSYS"."SDO_POINT_TYPE" to APEX_180200

These privileges were granted by SYS (SYS is grantor) in original database, and missing during upgrading.

Object privileges in original database,

SQL> select GRANTEE,GRANTOR,OWNER,TABLE_NAME,PRIVILEGE from dba_tab_privs
  2   where owner='MDSYS' and grantee='APEX_180200'
  3   order by grantor,table_name;

GRANTEE        GRANTOR    OWNER     TABLE_NAME                     PRIVILEGE
-------------- ---------- --------- ------------------------------ ----------------------
APEX_180200    MDSYS      MDSYS     MDERR                          EXECUTE
APEX_180200    MDSYS      MDSYS     SDO_GEOM_METADATA_TABLE        DELETE
APEX_180200    MDSYS      MDSYS     SDO_GEOM_METADATA_TABLE        SELECT
APEX_180200    MDSYS      MDSYS     SDO_GEOM_METADATA_TABLE        INSERT
APEX_180200    MDSYS      MDSYS     SDO_META                       EXECUTE
APEX_180200    MDSYS      MDSYS     SDO_UTIL                       EXECUTE
APEX_180200    MDSYS      MDSYS     USER_SDO_INDEX_INFO            SELECT
APEX_180200    SYS        MDSYS     SDO_DIM_ARRAY                  EXECUTE
APEX_180200    SYS        MDSYS     SDO_DIM_ELEMENT                EXECUTE
APEX_180200    SYS        MDSYS     SDO_ELEM_INFO_ARRAY            EXECUTE
APEX_180200    SYS        MDSYS     SDO_GEOMETRY                   EXECUTE
APEX_180200    SYS        MDSYS     SDO_ORDINATE_ARRAY             EXECUTE
APEX_180200    SYS        MDSYS     SDO_POINT_TYPE                 EXECUTE

Object privileges in current (partly upgraded) database,

SQL> select GRANTEE,GRANTOR,OWNER,TABLE_NAME,PRIVILEGE from dba_tab_privs
  2   where owner='MDSYS' and grantee='APEX_180200'
  3   order by grantor,table_name;

GRANTEE        GRANTOR    OWNER      TABLE_NAME                     PRIVILEGE
-------------- ---------- ---------- ------------------------------ --------------------
APEX_180200    MDSYS      MDSYS      MDERR                          EXECUTE
APEX_180200    MDSYS      MDSYS      SDO_GEOM_METADATA_TABLE        DELETE
APEX_180200    MDSYS      MDSYS      SDO_GEOM_METADATA_TABLE        INSERT
APEX_180200    MDSYS      MDSYS      SDO_GEOM_METADATA_TABLE        SELECT
APEX_180200    MDSYS      MDSYS      SDO_META                       EXECUTE
APEX_180200    MDSYS      MDSYS      SDO_UTIL                       EXECUTE
APEX_180200    MDSYS      MDSYS      USER_SDO_INDEX_INFO            SELECT

Workaround

Manually grant the missing privileges and click retry in DBUA.