ora-12514：tns；listener does not currently know of service requested in connect descriptor

这个错误通常是由于连接描述符中指定的服务名称与数据库实例中的服务名称不匹配导致的。您可以尝试以下步骤来解决此问题：

1. 确认您的连接描述符中指定的服务名称是否正确。
2. 确认您的数据库实例中是否存在该服务名称。您可以使用以下命令来列出所有可用的服务名称：

   lsnrctl services

3. 如果您的数据库实例中确实不存在该服务名称，则需要创建该服务。您可以使用以下命令来创建一个名为`ORCL`的服务：

   lsnrctl start
   lsnrctl services

4. 如果您的数据库实例中存在该服务名称，但仍然无法连接，请尝试重新启动监听器。您可以使用以下命令来停止和启动监听器：

   lsnrctl stop
   lsnrctl start

相关问题

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

ORA-12514 is an error that occurs when the Oracle listener is not able to find the requested service in the connect descriptor provided. This error typically indicates that the service name or SID specified in the connection string is incorrect or not known by the listener.

To resolve this issue, you can try the following steps:

1. Verify the service name or SID: Double-check the service name or SID specified in the connect descriptor. Make sure it matches the service name or SID defined in the Oracle database.

2. Check listener status: Ensure that the Oracle listener is running and listening for incoming connections. You can use the following command to check the listener status:

   lsnrctl status

If the listener is not running, start it using the following command:

   lsnrctl start

3. Register the service: If the service name or SID is correct, but still not known by the listener, you can try registering the service manually with the following command:

   lsnrctl services

This command will reload the listener configuration and make it aware of any new services.

4. Check network connectivity: Ensure that there is no network issue between the client and the Oracle server. Check if you can ping the server from the client machine and vice versa.

If none of these steps resolve the ORA-12514 error, it might be helpful to provide more information about your specific setup, such as the version of Oracle Database, operating system, and how you are connecting to the database.

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

ORA-12514错误通常在尝试连接Oracle数据库时发生，表明客户端无法找到服务器上注册的服务名（Service Name）。这个错误意味着Listener（监听器）未接收到客户端的请求，因为该服务没有在Listener配置文件中列出，或者Listener当前的状态不支持该连接。

解决这个问题，你可以按照以下步骤操作：

1. **检查Listener配置**：确认Listener是否已配置了正确的tnsnames.ora文件，并且服务名（SERVICE_NAME）在其中存在。打开`LISTENER.ORA`文件，查看对应的服务描述符部分。

2. **重启Listener**：有时Listener可能由于临时故障而没有更新配置，尝试重启Listener服务。

3. **验证TNS名称**：确保你在应用程序（如SQL*Plus、PL/SQL Developer等）中使用的TNS连接字符串语法正确，包括主机名、端口和服务名。

4. **运行tnsping命令**：在命令行输入`tnsping <service_name>`，如果返回成功，则说明网络连接正常，可能是Listener配置的问题。

5. **检查防火墙设置**：确保防火墙没有阻止数据库服务的通信。

6. **检查服务状态**：确认Oracle服务（如ORCL）正在运行。

如果你需要进一步帮助，可以提供更详细的错误信息，以便更好地定位问题。