说明：在DataGuard的搭建中，运行rman恢复的时候报错ORA-12528的错误；
脚本如下：RMAN> connect auxiliary sys/Oracle@SCMPRD02
解决步骤：
1、检查监听是否启动，脚本：tnsping SCMPRD02
方法一：配置数据库的监听为静态参数步骤：在ORACLE_HOME/network/admin 下面检查是否有listener.ora参数文件，如果没有的话运行netca创建数据库的监听，配置完成的监听文件如下：
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = SCMPRDDB02)(PORT = 1521))
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
)
)
ADR_BASE_LISTENER = /u01/app/oracle
方法二：修改tnsnames.ora文件
SCMPRD02 =
(DESCRIPTION =
(ADDRESS =
(PROTOCOL = TCP)(HOST = WELL)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED) (
SERVICE_NAME = SCMPRD02)
(UR = A) //增加该备注//
)
)
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = SCMPRDDB02)(PORT = 1521))
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
)
)
ADR_BASE_LISTENER = /u01/app/oracle
方法二：修改tnsnames.ora文件
SCMPRD02 =
(DESCRIPTION =
(ADDRESS =
(PROTOCOL = TCP)(HOST = WELL)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED) (
SERVICE_NAME = SCMPRD02)
(UR = A) //增加该备注//
)
)
总结：ORA-12528: TNS:listener: all appropriate instances are blocking new connections
因为我们复制数据库只是在nomount下打开，而数据库并没有mount,在11g下所有的监听都是动态监听，而只有在数据库mount以后，PMON进程起来以后，才能动态注册。所以对辅助数据库没有办法注册，只能被锁住。所以修改数据库的监听为静态监听，或者增加（UR=A)即可解决问题。谢谢阅读，希望能帮到大家，请继续关注服务器之家，我们会努力分享更多优秀的文章。
