登录数据库服务器，执行：

     $ lsnrctl status

Listening Endpoints Summary...
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=192.168.155.100)(PORT=1525)))
  (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...

居然没有service注册上。检查数据库service配置：

sql> show parameter service_names

service_names                        string      dg1.oracle.com,hr,oa 

sql>show parameter instance_name

instance_name                        string      dg

sql> show parameter domian_name

db_domain                            string      oracle.com

 

检查listener.ora

SID_LIST_LISTENER =
  (SID_LIST =
    (SID_DESC =
      (SID_NAME = PLSExtProc)
      (ORACLE_HOME = /u01/app/oracle/product/10.2.0/db_1)
      (PROGRAM = extproc)
    )
  )

LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.155.100)(PORT = 1521))
    )
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC0))
    )
  )

配置无问题

 

检查tnsnames.ora

OA =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.155.100)(PORT = 1521))
    )
    (CONNECT_DATA =http://www.mamicode.com/
      (SERVER = DEDICATED)
      (SERVICE_NAME = oa.oracle.com)
    )
  )

HR =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.155.100)(PORT = 1521))
    )
    (CONNECT_DATA =http://www.mamicode.com/
      (SERVICE_NAME = hr.oracle.com)
    )
  )

DG =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.155.100)(PORT = 1521))
    )
    (CONNECT_DATA =http://www.mamicode.com/
      (SERVER = DEDICATED)
      (SERVICE_NAME = dg1.oracle.com)
    )
  )

也没发现有问题，但是通过tns登录：sqlplus user/user@oa报错：

TNS-12514: TNS:listener does not currently know of service requested in connect descriptor

手工注册service:

sql> alter system register

服务仍然不能注册到listener。

这时突然想到了local_listner参数，

sql> show parameter local_listener

(address=(protocol=tcp)(host=192.168.129.201)(port=1521))

而listener实际用的ip是192.168.155.100。

发现这台机器有两张网卡，ip分别为：192.168.155.100和192.168.129.201，之前有维护人员大概想将listener绑定到192.168.129.201这个ip上，但采用的方法不对。

修改local_listener参数，sql> alter system set local_listener=‘‘;

再重新注册服务，sql> alter system register;

查看注册情况，$ lsnrctl status

Service "PLSExtProc" has 1 instance(s).
  Instance "PLSExtProc", status UNKNOWN, has 1 handler(s) for this service...
Service "dg1.oracle.com" has 1 instance(s).
  Instance "dg", status READY, has 4 handler(s) for this service...
Service "dg1_XPT.oracle.com" has 1 instance(s).
  Instance "dg", status READY, has 4 handler(s) for this service...
Service "hr.oracle.com" has 1 instance(s).
  Instance "dg", status READY, has 4 handler(s) for this service...
Service "oa.oracle.com" has 1 instance(s).
  Instance "dg", status READY, has 4 handler(s) for this service...

service_names中定义的服务都成功动态注册到listener。

远程pl/sql连接数据库成功。

 

--本篇文章转自：http://blog.sina.com.cn/s/blog_8345cdd90100v6wx.html