I have Oracle Database 12.1.0.2 version and when refreshing a materialized view the following error appears:
BEGIN DBMS_MVIEW.REFRESH(list=>'GENERADOR',method=>'C',atomic_refresh=>FALSE); END;
*
ERROR at line 1:
ORA-12008: error in materialized view or zonemap refresh path
ORA-06512: at "SYS.DBMS_SNAPSHOT_KKXRCA", line 3012
ORA-06512: at "SYS.DBMS_SNAPSHOT_KKXRCA", line 2424
ORA-08176: consistent read failure; rollback data not available
ORA-02063: preceding line from GISP
ORA-06512: at "SYS.DBMS_SNAPSHOT_KKXRCA", line 88
ORA-06512: at "SYS.DBMS_SNAPSHOT_KKXRCA", line 253
ORA-06512: at "SYS.DBMS_SNAPSHOT_KKXRCA", line 2405
ORA-06512: at "SYS.DBMS_SNAPSHOT_KKXRCA", line 2968
ORA-06512: at "SYS.DBMS_SNAPSHOT_KKXRCA", line 3255
ORA-06512: at "SYS.DBMS_SNAPSHOT_KKXRCA", line 3287
ORA-06512: at "SYS.DBMS_SNAPSHOT", line 16
ORA-06512: at line 1