今天做Linux下DG配置的时候，遇到一个现象，tnsname.ora文件配置都正常，tnsping也正常，监听也正常，但是仍然报ORA-12514错误：
SQL> set lin 130 pages 130
SQL> select dest_id,error from v$archive_dest;
DEST_ID ERROR
---------- -----------------------------------------------------------------
1
3
4
5
6
7
8
9
10
--查看主库监听
SQL> !lsnrctl status
LSNRCTL for Linux: Version 10.2.0.5.0 - Production on 08-OCT-2014 12:31:46
Copyright (c) 1991, 2010, Oracle. All rights reserved.
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=prd)(PORT=1521)))
STATUS of the LISTENER
------------------------
Alias LISTENER
Version TNSLSNR for Linux: Version 10.2.0.5.0 - Production
Start Date 08-OCT-2014 10:34:51
Uptime 0 days 1 hr. 56 min. 54 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Parameter File /u01/app/oracle/product/10.2.0/db_1/network/admin/listener.ora
Listener Log File /u01/app/oracle/product/10.2.0/db_1/network/log/listener.log
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=prd)(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...
has 1 instance(s).
, status READY, has 1 handler(s) for this service...
Service "prdXDB" has 1 instance(s).
Instance "prd", status READY, has 1 handler(s) for this service...
Service "prd_XPT" has 1 instance(s).
Instance "prd", status READY, has 1 handler(s) for this service...
The command completed successfully
--tnsnames.ora文件内容
# tnsnames.ora Network Configuration File: /u01/app/oracle/product/10.2.0/db_1/network/admin/tnsnames.ora
# Generated by Oracle configuration tools.
EXTPROC_CONNECTION_DATA =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC0))
)
(CONNECT_DATA =
(SID = PLSExtProc)
(PRESENTATION = RO)
)
)
=
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = prd)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
()
)
)
=
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = std)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
()
)
)
--主库tnsping测试网络服务名是否正常
SQL> !tnsping
TNS Ping Utility for Linux: Version 10.2.0.5.0 - Production on 08-OCT-2014 12:32:35
Copyright (c) 1997, 2010, Oracle. All rights reserved.
Used parameter files:
Used TNSNAMES adapter to resolve the alias
Attempting to contact (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = prd)(PORT = 1521)) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = prd)))
SQL> !tnsping
TNS Ping Utility for Linux: Version 10.2.0.5.0 - Production on 08-OCT-2014 12:32:43
Copyright (c) 1997, 2010, Oracle. All rights reserved.
Used parameter files:
Used TNSNAMES adapter to resolve the alias
Attempting to contact (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = std)(PORT = 1521)) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = prd)))
--查看备库监听
[oracle@std ~]$ lsnrctl status
LSNRCTL for Linux: Version 10.2.0.5.0 - Production on 08-OCT-2014 12:29:52
Copyright (c) 1991, 2010, Oracle. All rights reserved.
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=std)(PORT=1521)))
STATUS of the LISTENER
------------------------
Alias LISTENER
Version TNSLSNR for Linux: Version 10.2.0.5.0 - Production
Start Date 08-OCT-2014 09:41:41
Uptime 0 days 2 hr. 48 min. 11 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Parameter File /u01/app/oracle/product/10.2.0/db_1/network/admin/listener.ora
Listener Log File /u01/app/oracle/product/10.2.0/db_1/network/log/listener.log
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=std)(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...
has 1 instance(s).
, status READY, has 1 handler(s) for this service...
Service "std_XPT" has 1 instance(s).
Instance "prd", status READY, has 1 handler(s) for this service...
The command completed successfully
--查看备库远程归档路径
SQL> set lin 130 pages 130
SQL> col error for a20
SQL> select dest_id,error,status from v$archive_dest;
DEST_ID ERROR STATUS
---------- -------------------- ---------
1 VALID
3 INACTIVE
4 INACTIVE
5 INACTIVE
6 INACTIVE
7 INACTIVE
8 INACTIVE
9 INACTIVE
10 INACTIVE
11 VALID
--备库tnsping测试网络服务器名是否正常
SQL> !tnsping
TNS Ping Utility for Linux: Version 10.2.0.5.0 - Production on 08-OCT-2014 12:39:40
Copyright (c) 1997, 2010, Oracle. All rights reserved.
Used parameter files:
Used TNSNAMES adapter to resolve the alias
Attempting to contact (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = prd)(PORT = 1521)) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = prd)))
SQL> !tnsping
TNS Ping Utility for Linux: Version 10.2.0.5.0 - Production on 08-OCT-2014 12:39:44
Copyright (c) 1997, 2010, Oracle. All rights reserved.
Used parameter files:
Used TNSNAMES adapter to resolve the alias
Attempting to contact (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = std)(PORT = 1521)) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = prd)))
tnsping测试下来也都是通的，这就比较奇怪了，但是ORA-12514错误很明显是指监听方面的问题，导致服务名无法解析，由于主备库采用的是同一个实例名，因此两边的instance_name用的都是prd，乍一看好像很正常，但是解析确实出现了问题，那么怎么办呢？
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