OGG-00868 The number of Oracle redo threads (3) is not the same as the number of checkpoint threads (2).

2022-11-30 00:06:33 ERROR OGG-00868 The number of Oracle redo threads (3) is not the same as the number of checkpoint threads (2).
EXTRACT groups on RAC systems should be created with the THREADS parameter (e.g., ADD EXT <group name>, TRANLOG, THREADS 3, BEGIN...).

--主库
select THREAD#,STATUS,ENABLED,LAST_REDO_SEQUENCE# from v$thread;
THREAD# STATUS ENABLED LAST_REDO_SEQUENCE#
------- --------------- -------- -------------------
1 OPEN PUBLIC 21
2 OPEN PUBLIC 7
3 CLOSED DISABLED 0

set liens 999 pages 999
select * from v$log;
select * from v$standby_log;

alter database drop logfile group 31;
alter database drop logfile group 32;
alter database drop logfile group 33;
alter database drop logfile group 34;

alter database drop logfile group 35;
alter database drop logfile group 36;
alter database drop logfile group 37;
alter database drop logfile group 38;
alter database drop logfile group 39;

drop tablespace UNDOTBS3;

select THREAD#,STATUS,ENABLED,LAST_REDO_SEQUENCE# from v$thread;
THREAD# STATUS ENABLED LAST_REDO_SEQUENCE#
------- --------------- -------- -------------------
1 OPEN PUBLIC 21
2 OPEN PUBLIC 7

--备库
alter database recover managed standby database cancel;
alter system set standby_file_management=manual;

alter database drop logfile group 31;
alter database drop logfile group 32;
alter database drop logfile group 33;
alter database drop logfile group 34;

alter database drop logfile group 35;
alter database drop logfile group 36;
alter database drop logfile group 37;
alter database drop logfile group 38;
alter database drop logfile group 39;

alter system set standby_file_management=auto;
alter database recover managed standby database using current logfile disconnect from session;

--重新启动进程
alter EHSSP, begin now
start EHSSP
start PHSSP