Question

我在尝试通过监听器连接到Oracle数据库XE时遇到问题：

 sqlplus system/my_password@XE

我收到以下错误：

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

我使用的是Ubuntu 12.10和Oracle Express Edition 11g。

我的主要目标是将java + oracle db与jdbc连接，但是我得到了同样的错误。

这是我的listener.ora

# listener.ora Network Configuration File:

SID_LIST_LISTENER =
  (SID_LIST =
    (SID_DESC =
      (SID_NAME = PLSExtProc)
      (ORACLE_HOME = /u01/app/oracle/product/11.2.0/xe)
      (PROGRAM = extproc)
    )
  )

LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC_FOR_XE))
      (ADDRESS = (PROTOCOL = TCP)(HOST = watson)(PORT = 1521))
    )
  )

DEFAULT_SERVICE_LISTENER = (XE)

和tnsnames.ora

# tnsnames.ora Network Configuration File:

XE =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = watson)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = XE)
    )
  )

EXTPROC_CONNECTION_DATA =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC_FOR_XE))
    )
    (CONNECT_DATA =
      (SID = PLSExtProc)
      (PRESENTATION = RO)
    )
  )

和

lsnrctl service

LSNRCTL for Linux: Version 11.2.0.2.0 - Production on 04-FEB-2014 17:01:44
Copyright (c) 1991, 2011, Oracle.  All rights reserved.
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC_FOR_XE)))
Services Summary...
Service "PLSExtProc" has 1 instance(s).
  Instance "PLSExtProc", status UNKNOWN, has 1 handler(s) for this service...
    Handler(s):
      "DEDICATED" established:0 refused:0
         LOCAL SERVER
The command completed successfully

Answer 1

假设您的数据库即使在侦听器运行一段时间后仍未注册，听起来您的local_listener参数未明确设置，因此您的数据库正在尝试注册on a default address;并且因为它没有注册，所以它所使用的任何地址似乎与听众不同。

假设watson正在解析一个有用的外部IP地址，如果你能够从你的盒子外面得到那个TNS错误，那么你可以告诉数据库使用相同的地址来注册：

alter system set local_listener = '(ADDRESS=(PROTOCOL=TCP)(HOST=watson)(PORT=1521))' scope=memory;
alter system register;

如果有效且lsnrctl services现在显示XE并且您对此感到满意，则可以将memory更改为both并重新执行so it persists across the next DB restart }。

或者，如果您只尝试在同一个框内进行连接，则watson可能会解析为无用的内容，例如127.0.0.1，如果它已设置为在/etc/hosts中执行此操作;或者您的/etc/hosts地址可能与您的DNS条目不一致。您可以将listener.ora和tnsnames.ora更改为“正确的”FQDN或IP地址，只要该匹配数据库认为的网络名称。

Answer 2

tnsnames.ora很好，它用于sqlplus客户端。 listener.ora并不好。键入lsnrctl服务时，您缺少XE服务很难相信你必须设置listener.ora才能安装Oracle Express。

以下是我测试VM的一个示例。

Service "PEXPROC" has 1 instance(s).
  Instance "PEXPROC", status UNKNOWN, has 1 handler(s) for this service...
    Handler(s):
      "DEDICATED" established:0 refused:0
         LOCAL SERVER
Service "ocmdb" has 1 instance(s).
  Instance "ocmdb", status UNKNOWN, has 1 handler(s) for this service...
    Handler(s):
      "DEDICATED" established:29 refused:0
         LOCAL SERVER
The command completed successfully

我在listener.ora中的示例段

SID_LIST_LISTENER_OCM =
  (SID_LIST =
    (SID_DESC =
      (GLOBAL_DBNAME = ocmdb)
      (ORACLE_HOME = /u01/app/oracle/product/11.2.0/db_1)
      (SID_NAME = ocmdb)
    )
  )

Answer 3

我不得不在Windows服务中重新启动OracleServiceXE服务，并且该服务再次正常工作。

ORA-12514：TNS：监听器当前不知道连接描述符中请求的服务

3 个答案: