ORACLE11g ORA 12514 TNS 监听程序当前无法识别连接描述符中请求的服务

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1、TNS连接错误

同事跟我说连接oracle数据库报错ORA-12514: TNS: 监听程序当前无法识别连接描述符中请求的服务，如下所示：

2、查看本地TNSPING

查看本地的tns配置：

WXX =

(DESCRIPTION =

(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.121.58)(PORT = 1521))

(CONNECT_DATA =

(SERVER = DEDICATED)

(SERVICE_NAME = orcl)

)

查看本地的tnsping是ok的

C:\Users\Administrator>tnsping WXX

TNS Ping Utility for 32-bit Windows: Version 11.2.0.1.0 - Production on 26-10月-2016 11:31:04

已使用的参数文件:

D:\app\Administrator\product\11.2.0\client_2\network\admin\sqlnet.ora

已使用 TNSNAMES 适配器来解析别名

尝试连接 (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.121.58)(PORT = 1521)) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = orcl)))

OK (30 毫秒)

C:\Users\Administrator>

本地的tnsping暂时看来是正常的，是ok的。

3、查看网络连接

telnet 192.168.121.58 1521，也是能进去的，证明网络ok

oracle服务器的iptables也是关闭的

文章来源地址：http://blog.csdn.net/mchdba/article/details/52949382 ，博主mchdba（黄杉）谢绝转载。

4、查看服务器的lsnrctl服务

去服务器看lsnrctl状态：

[oracle@iZ23vluqpmmZ admin]$ lsnrctl status

LSNRCTL for Linux: Version 11.2.0.1.0 - Production on 26-OCT-2016 11:33:32

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1521)))

STATUS of the LISTENER

------------------------

Alias LISTENER

Version TNSLSNR for Linux: Version 11.2.0.1.0 - Production

Start Date 26-OCT-2016 11:09:33

Uptime 0 days 0 hr. 23 min. 59 sec

Trace Level off

Security ON: Local OS Authentication

SNMP OFF

Listener Parameter File /usr/oracle/app/product/11.2.0/dbhome_1/network/admin/listener.ora

Listener Log File /usr/oracle/app/diag/tnslsnr/iZ23vluqpmmZ/listener/alert/log.xml

Listening Endpoints Summary...

(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521)))

(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=192.168.121.58)(PORT=1521)))

The listener supports no services

The command completed successfully

[oracle@iZ23vluqpmmZ admin]$

看到no services，也就是说lsnrctl监听服务启动起来，没有任何oracle实例的，所以问题就来了，没有oracle实例，客户端通过lsnrctl监听的话，就连接不到实例信息。所以这里我们需要添加实例信息，添加实例信息，就在listener.ora配置文件里面。

5、在listener.ora里面添加实例信息

完善listener.ora配置：

[oracle@iZ23vluqpmmZ admin]$ cp listener.ora z_listener.ora.bak

[oracle@iZ23vluqpmmZ admin]$ vim listener.ora

[oracle@iZ23vluqpmmZ admin]$

[oracle@iZ23vluqpmmZ admin]$ more listener.ora

# listener.ora Network Configuration File: /usr/oracle/app/product/11.2.0/dbhome_1/network/admin/listener.ora

# Generated by Oracle configuration tools.

LISTENER =

(DESCRIPTION_LIST =

(DESCRIPTION =

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

(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.121.58)(PORT = 1521))

)

) # 下面就是添加的新实例信息

SID_LIST_LISTENER =

(SID_LIST =

(SID_DESC =

(GLOBAL_DBNAME = orcl)

(SID_NAME = orcl)

)

ADR_BASE_LISTENER = /usr/oracle/app

[oracle@iZ23vluqpmmZ admin]$

设置完后，重启监听lsnrctl服务，可以看到会有一个instance服务启动起来了：

[oracle@iZ23vluqpmmZ admin]$ lsnrctl stop

LSNRCTL for Linux: Version 11.2.0.1.0 - Production on 26-OCT-2016 11:38:29

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1521)))

The command completed successfully

[oracle@iZ23vluqpmmZ admin]$ lsnrctl start

LSNRCTL for Linux: Version 11.2.0.1.0 - Production on 26-OCT-2016 11:38:33

Starting /usr/oracle/app/product/11.2.0/dbhome_1/bin/tnslsnr: please wait...

TNSLSNR for Linux: Version 11.2.0.1.0 - Production

System parameter file is /usr/oracle/app/product/11.2.0/dbhome_1/network/admin/listener.ora

Log messages written to /usr/oracle/app/diag/tnslsnr/iZ23vluqpmmZ/listener/alert/log.xml

Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521)))

Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=192.168.75.58)(PORT=1521)))

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1521)))

STATUS of the LISTENER

------------------------

Alias LISTENER

Version TNSLSNR for Linux: Version 11.2.0.1.0 - Production

Start Date 26-OCT-2016 11:38:33

Uptime 0 days 0 hr. 1 min. 3 sec

Trace Level off

Security ON: Local OS Authentication

SNMP OFF

Listener Parameter File /usr/oracle/app/product/11.2.0/dbhome_1/network/admin/listener.ora

Listener Log File /usr/oracle/app/diag/tnslsnr/iZ23vluqpmmZ/listener/alert/log.xml

Listening Endpoints Summary...

(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521)))

(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=192.168.75.58)(PORT=1521)))

Services Summary...

Service "orcl" has 1 instance(s).

Instance "orcl", status UNKNOWN, has 1 handler(s) for this service...

The command completed successfully

[oracle@iZ23vluqpmmZ admin]$

OK，在问下同事，同事说能连接上了，问题解决。

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