搭建hadr备库切换主库报错SQL1770N

[db2inst2@localhost ~]$ db2 TAKEOVER HADR ON DATABASE MYDB3

SQL1770N  Takeover HADR cannot complete. Reason code = "5".

[db2inst2@localhost ~]$ db2 ? SQL1770N

5                   Activate the standby database, then issue the takeover command.

[db2inst2@localhost ~]$ db2 connect to mydb3

SQL1776N  The command cannot be issued on an HADR standby database. Reason code = "1".

[db2inst2@localhost ~]$ db2 takeover hadr on database mydb3 by force

SQL1770N  Takeover HADR cannot complete. Reason code = "5".