今天遇到一個比較奇怪的問題，在sqlplus通過OS認證登陸數據庫服務器是正常的
[oracle@localhost ~]$ sqlplus / as sysdba
SQL*Plus: Release 10.2.0.4.0 - Production on Thu Jul 3 11:23:35 2014
Copyright (c) 1982, 2007, Oracle. All Rights Reserved.
Connected to:
Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
SQL> select status from v$instance;
STATUS
------------------------------------
OPEN
如果通過服務名登陸，就會提示下面錯誤
[oracle@localhost ~]$ sqlplus test/test@orcl
SQL*Plus: Release 10.2.0.4.0 - Production on Thu Jul 3 11:04:19 2014Copyright (c) 1982, 2007, Oracle. All Rights Reserved.
ERROR:
ORA-01034: ORACLE not available
ORA-27101: shared memory realm does not exist
Linux-x86_64 Error: 2: No such file or directory
查看ORACLE_HOME、ORACLE_SID沒有問題
[oracle@localhost ~]$ echo $ORACLE_HOME
/oracle/product/10.2.0/db_1
[oracle@localhost ~]$ echo $ORACLE_SID
orcl
查看監聽沒有問題
[oracle@localhost ~]$ lsnrctl status
LSNRCTL for Linux: Version 10.2.0.4.0 - Production on 03-JUL-2014 11:25:17
Copyright (c) 1991, 2007, Oracle. All rights reserved.
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=192.168.0.147)(PORT=1521)))
STATUS of the LISTENER
------------------------
Alias LISTENER
Version TNSLSNR for Linux: Version 10.2.0.4.0 - Production
Start Date 03-JUL-2014 11:14:46
Uptime 0 days 0 hr. 10 min. 30 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Parameter File /oracle/product/10.2.0/db_1/network/admin/listener.ora
Listener Log File /oracle/product/10.2.0/db_1/network/log/listener.log
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=192.168.0.147)(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 "orcl" has 1 instance(s).
Instance "orcl", status UNKNOWN, has 1 handler(s) for this service...
The command completed successfully
查看tnsnames.ora文件配置
[oracle@localhost ~]$ cat /oracle/product/10.2.0/db_1/network/admin/tnsnames.ora
# tnsnames.ora Network Configuration File: /oracle/product/10.2.0/db_1/network/admin/tnsnames.ora
# Generated by Oracle configuration tools.
ORCL =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.0.147)(PORT = 1521))
)
(CONNECT_DATA =
(SERVICE_NAME = orcl)
)
)
查看sqlnet.ora文件配置
[oracle@localhost ~]$ cat /oracle/product/10.2.0/db_1/network/admin/sqlnet.ora
#sqlnet.authentication_services=(NONE)
#names.directory_path=(tnsnames,onames,hostname)
查看listener.ora文件配置
[oracle@localhost ~]$ cat /oracle/product/10.2.0/db_1/network/admin/listener.ora
# listener.ora Network Configuration File: /oracle/product/10.2.0/db_1/network/admin/listener.ora
# Generated by Oracle configuration tools.
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = /oracle/product/10.2.0/db_1)
(PROGRAM = extproc)
)
(SID_DESC =
(GLOBAL_DBNAME = orcl)
(ORACLE_HOME = /oracle/product/10.2.0/db_1/)
(SID_NAME = orcl)
)
)
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.0.147)(PORT = 1521))
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC0))
)
)
經過仔細查找，終於發現問題，原來是listener.ora文件中ORACLE_HOME路徑最後多了個斜槓，去掉後重啓監聽解決。
[oracle@localhost ~]$ sqlplus test/test@orcl
SQL*Plus: Release 10.2.0.4.0 - Production on Thu Jul 3 11:40:29 2014
Copyright (c) 1982, 2007, Oracle. All Rights Reserved.
Connected to:
Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
SQL>