存储故障导致手动重建创建数据库后，出现通过tns不能连接的问题；检查发现tnsnames.ora中配置的host为scan_ip;但是，如果通过vip则可以访问数据库；那么可以确定是scan ip或scan listener问题；

检查所有listener后，发现LISTENER、LISTENER_SCAN1状态都正常，只是LISTENER_SCAN1没有注册服务；对比重建前后的相关listener参数后，发现新创建的数据库remote_listener参数没有设置，设置后正常，问题解决；下面是测试环境的配置表；

grid用户下$GRID_HOME/network/admin/listener.ora

[grid@db1 admin]$ cat listener.ora

LISTENER_SCAN1=(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=IPC)(KEY=LISTENER_SCAN1)))) # line added by Agent

LISTENER=(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=IPC)(KEY=LISTENER)))) # line added by Agent

ENABLE_GLOBAL_DYNAMIC_ENDPOINT_LISTENER=ON # line added by Agent

ENABLE_GLOBAL_DYNAMIC_ENDPOINT_LISTENER_SCAN1=ON # line added by Agent

grid用户下$GRID_HOME/network/admin/sqlnet.ora

[grid@db1 admin]$ cat sqlnet.ora

# sqlnet.ora.db1 Network Configuration File: /u01/app/11.2.0/grid/network/admin/sqlnet.ora.db1

# Generated by Oracle configuration tools.

NAMES.DIRECTORY_PATH= (TNSNAMES, EZCONNECT)

ADR_BASE = /u01/app/grid

oracle用户下$ORACLE_HOME/network/admin/tnsnames.ora

[oracle@db1 admin]$ cat tnsnames.ora

# tnsnames.ora Network Configuration File: /u01/app/oracle/product/11.2.0/db_1/network/admin/tnsnames.ora

# Generated by Oracle configuration tools.

RACDB =

(DESCRIPTION =

(ADDRESS = (PROTOCOL = TCP)(HOST = rac-scan)(PORT = 1521))

(CONNECT_DATA =

(SERVER = DEDICATED)

(SERVICE_NAME = racdb)

)

此时，如果没有设置remote_listener参数，则不能通过scan ip登录，如：

$sqlplus system/oracle@racdb

报错，不能连接；

设置remote_listener后正常；

SQL>alter system set remote_listener =' rac-scan:1521' scope=both sid='*';

SQL>show parameter listener

NAME TYPE VALUE

------------------------------------ ----------- ------------------------------

listener_networks string

local_listener string (DESCRIPTION=(ADDRESS_LIST=(AD

DRESS=(PROTOCOL=TCP)(HOST=192

.168.1.120)(PORT=1521))))

remote_listener string rac-scan:1521