备库alert日志如下：

Errors in file /data/app/oracle/diag/rdbms/standby/orcl/trace/orcl_m000_31006.trc:

ORA-00313: open failed for members of log group 3 of thread 1

ORA-00312: online log 3 thread 1: '/data/oradata/orcl/redo03.log'

ORA-27037: unable to obtain file status

Linux-x86_64 Error: 2: No such file or directory

Additional information: 7

并且 /data/oradata/orcl/ 目录下并无 online redo log存在。

解决办法：

备库修改参数

alter system set log_file_name_convert='/data/oradata/orcl','/data/oradata/orcl' scope=spfile ;

然后重启备库。