Correct solution: service_name in tnsnames.ora should actually be monitored by the listener
Services Summary...
Service "PLSExtProc" has 1 instance(s).
Instance "PLSExtProc", status UNKNOWN, has 1 handler(s) for this service...
Service "test.test.doudou.com" has 1 instance(s).
Instance "test", status READY, has 1 handler(s) for this service...
Service "testXDB.test.doudou.com" has 1 instance(s).
Instance "test", status READY, has 1 handler(s) for this service...
Service "test_XPT.test.doudou.com" has 1 instance(s).
Instance "test", status READY, has 1 handler(s) for this service...
The command completed successfully
scene memory
View service_names,db_domain
SQL> show parameter service_names
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
service_names string test
SQL> show parameter db_domain
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
db_domain string test.doudou.com
tnsping , you can ping
[no@dg-ss dbs] $ tnsping test
TNS Ping Utility for Linux: Version 10.2.0.4.0 - Production on 08-AUG-2008 17:23:19
Copyright (c) 1997, 2007, Oracle. All rights reserved.
Used parameter files:
/opt/oracle/product/10.2.0/db_2/network/admin/sqlnet.ora
Used TNSNAMES adapter to resolve the alias
Attempting to contact (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = dg-ss)(PORT = 1521)) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = test)))
OK (0 msec)
User login error ORA-12514
[ora@dg-ss dbs]$ sqlplus doudou/123@test
SQL*Plus: Release 10.2.0.4.0 - Production on Fri Aug 8 17:23:23 2008
Copyright (c) 1982, 2007, Oracle. All Rights Reserved.
ERROR:
ORA-12514: TNS:listener does not currently know of service requested in connect
descriptor
View listener status
[ora@dg-ss dbs]$ lsnrctl status
LSNRCTL for Linux: Version 10.2.0.4.0 - Production on 08-AUG-2008 17:22:00
Copyright (c) 1991, 2007, Oracle. All rights reserved.
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=dg-ss)(PORT=1521)))
STATUS of the LISTENER
------------------------
Alias LISTENER
Version TNSLSNR for Linux: Version 10.2.0.4.0 - Production
Start Date 08-AUG-2008 17:21:35
Uptime 0 days 0 hr. 0 min. 24 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Parameter File /opt/oracle/product/10.2.0/db_2/network/admin/listener.ora
Listener Log File /opt/oracle/product/10.2.0/db_2/network/log/listener.log
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=dg-ss)(PORT=1521)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC0)))
Services Summary...
Service "PLSExtProc" has 1 instance(s).
Instance "PLSExtProc", status UNKNOWN, has 1 handler(s) for this service...
Service "test.test.doudou.com" has 1 instance(s).
Instance "test", status READY, has 1 handler(s) for this service...
Service "testXDB.test.doudou.com" has 1 instance(s).
Instance "test", status READY, has 1 handler(s) for this service...
Service "test_XPT.test.doudou.com" has 1 instance(s).
Instance "test", status READY, has 1 handler(s) for this service...
The command completed successfully
View the tnsnames.ora file
[ora@dg-ss admin]$ cat tnsnames.ora
TEST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = dg-ss)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = test)
)
)
Solution
TEST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = dg-ss)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = test.test.doudou.com)
)
)
User can log in normally
[ora@dg-ss admin]$ sqlplus doudou/123@test
SQL*Plus: Release 10.2.0.4.0 - Production on Fri Aug 8 17:24:14 2008
Copyright (c) 1982, 2007, Oracle. All Rights Reserved.
Connected to:
Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
SQL>
Summarize:
Through this simple mistake, I realized that the study of oracle cannot follow what others say, and it is necessary to study deeper and more clearly through experiments.
Finally remind myself that the service_name in tnsnames.ora is the service_name monitored by the listener and can also be considered as servcie_name=db_name.db_domain