ORA-12514: TNS: 监听程序当前无法识别连接描述符中请求的服务解决【转载】

问题：Oracle主服务和监听器服务已经启动，使用SQL Plus能够正常连接，使用PL SQL Developer连接报次错误：ORA-12514: TNS: 监听程序当前无法识别连接描述符中请求的服务。如图：



解决方法：

解决：

打开H:\Oracle\product\11.2.0\dbhome_1\NETWORK\ADMIN（不同机器目录可能不同）目录下的listener.ora文件，发现此文件内容如下：

#listener.ora Network Configuration File:
H:\Oracle\product\11.2.0\dbhome_1\network\admin\listener.ora
#Generated by Oracle configuration tools.

SID_LIST_LISTENER=
(SID_LIST =
(SID_DESC =
(SID_NAME = CLRExtProc)
(ORACLE_HOME =H:\Oracle\product\11.2.0\dbhome_1)
(PROGRAM = extproc)
(ENVS ="EXTPROC_DLLS=ONLY:H:\Oracle\product\11.2.0\dbhome_1\bin\oraclr11.dll")
)
)

LISTENER=
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = IPC)(KEY =EXTPROC1521))
(ADDRESS = (PROTOCOL = TCP)(HOST =localhost)(PORT = 1521))
)
)

ADR_BASE_LISTENER= H:\Oracle

修改成如下内容（注意红色部分的内容）：

#listener.ora Network Configuration File:

H:\Oracle\product\11.2.0\dbhome_1\network\admin\listener.ora

#Generated by Oracle configuration tools.

SID_LIST_LISTENER=

(SID_LIST =

(SID_DESC =

(GLOBAL_DBNAME = ORCL)

(ORACLE_HOME =H:\Oracle\product\11.2.0\dbhome_1)

(SID_NAME = ORCL)

)

(SID_DESC =

(SID_NAME = CLRExtProc)

(ORACLE_HOME = H:\Oracle\product\11.2.0\dbhome_1)

(PROGRAM = extproc)

(ENVS ="EXTPROC_DLLS=ONLY:H:\Oracle\product\11.2.0\dbhome_1\bin\oraclr11.dll")

)

)

LISTENER=

(DESCRIPTION_LIST =

(DESCRIPTION =

(ADDRESS = (PROTOCOL = IPC)(KEY =EXTPROC1521))

(ADDRESS = (PROTOCOL = TCP)(HOST =localhost)(PORT = 1521))

)

)

ADR_BASE_LISTENER= H:\Oracle

转载地址：http://www.linuxidc.com/Linux/2012-09/69678.htm