centos: ORA-12514: TNS:listener does not currently know of service requested in connect descriptor_centos listenner does not

我们采用静态注册方法将webdb服务注册到监听器中，$Oracle_HOME/network/admin/listener.ora中的内容设置如下：

1. SID_LIST_LISTENER =
2. (SID_LIST =
3. (SID_DESC =
4. (SID_NAME = PLSExtProc)
5. (ORACLE_HOME = /u01/app/oratt/product/10.2.0/dbhome_1)
6. (PROGRAM = extproc)
7. )
8. (SID_DESC =
9. (SID_NAME = webdb)
10. (ORACLE_HOME = /u01/app/oratt/product/10.2.0/dbhome_1)
11. )
12. )
14. LISTENER =
15. (DESCRIPTION_LIST =
16. (DESCRIPTION =
17. (ADDRESS = (PROTOCOL = TCP)(HOST = serv1)(PORT = 1844))
18. (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC0))
19. )
20. )

其中这几行文字是为了静态注册webdb而加入的，如下：

1. (SID_DESC =
2. (SID_NAME = webdb)
3. (ORACLE_HOME = /u01/app/oratt/product/10.2.0/dbhome_1)
4. )

监听器的服务状况一直是UNKNOWN，不管注册使用的数据库实例是否打开。如下所示：

1. oratt@serv1:/home/oratt=>webdb$lsnrctl services
2. LSNRCTL for Linux: Version 10.2.0.4.0 - Production on 07-NOV-201213:37:56
3. Copyright (c) 1991, 2007, Oracle. All rights reserved.
4. Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=serv1)(PORT=1844)))
5. Services Summary...
6. Service "PLSExtProc" has 1 instance(s).
7. Instance "PLSExtProc", status UNKNOWN, has 1 handler(s) for this service...
8. Handler(s):
9. "DEDICATED" established:0 refused:0
10. LOCAL SERVER
11. Service "webdb" has 1 instance(s).
12. Instance "webdb", status UNKNOWN, has 1 handler(s) for this service...
13. Handler(s):
14. "DEDICATED" established:3 refused:0
15. LOCAL SERVER
16. The command completed successfully

因为这个监听器的端口号不是1521(默认注册)，所以采用必须的得采用下面的动态注册方法

动态注册方法 如下所示：

$sqlplus / as sysdba

SQL>alter system set local_listener='(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=TCP)(HOST=192.168.15.90)(PORT=1844))))';

 或者

SQL> alter system set LOCAL_LISTENER='(ADDRESS=(PROTOCOL=TCP)(HOST=192.168.15.90)(PORT=1844))' scope=both;
SQL> alter system register;

修改之后，使用lsnrctl services检查监听器的服务状况，会发现有webdb注册进来，其状态是ready。发现该服务已经注册到监听器。

1. oratt@serv2:/home/oratt=>webdb$lsnrctl services
2. LSNRCTL for Linux: Version 10.2.0.4.0 - Production on 07-NOV-201213:55:38
3. Copyright (c) 1991, 2007, Oracle. All rights reserved.
4. Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=serv2)(PORT=1844)))
5. Services Summary...
6. Service "PLSExtProc" has 1 instance(s).
7. Instance "PLSExtProc", status UNKNOWN, has 1 handler(s) for this service...
8. Handler(s):
9. "DEDICATED" established:0 refused:0
10. LOCAL SERVER
11. Service "webdb" has 1 instance(s).
12. Instance "webdb", status READY, has 1 handler(s) for this service...
13. Handler(s):
14. "DEDICATED" established:0 refused:0 state:ready
15. LOCAL SERVER
16. Service "webdb_XPT" has 1 instance(s).
17. Instance "webdb", status READY, has 1 handler(s) for this service...
18. Handler(s):
19. "DEDICATED" established:0 refused:0 state:ready
20. LOCAL SERVER
21. The command completed successfully