咨询个问题：oracle 11.2.0.0.0 双机热备（一主一备） 升级11.2.0.4.0 第一台升级成功；第二台报ora-01041内部错误，hostdef扩展名不存在；第二台：可以mount, 但open;报错：SQL> alter database open;
alter database open
*
第 1 行出现错误:

ORA-01092: ORACLE instance terminated. Disconnection forced 
 ORA-00704: bootstrap process failure 
 ORA-39700: database must be opened with UPGRADE option 

处理：startup upgrade 执行catupgrd.sql 报错：