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

ORA-12514是Oracle数据库常见的错误之一，表示客户端尝试连接到的服务名称或者服务别名在监听器中不存在。这个错误通常会在以下情况下出现：

1. 服务名或者服务别名被拼写错误或者大小写不正确。
2. 监听器没有启动或者没有监听到该服务。
3. 服务名或者服务别名没有在tnsnames.ora文件中正确定义。

要解决这个问题，你可以尝试以下步骤：

1. 确认服务名或者服务别名的拼写和大小写是否正确。
2. 确认监听器是否已经启动，并且在监听该服务。
3. 确认tnsnames.ora文件中是否正确定义了服务名或者服务别名。
4. 可以通过使用IP地址代替服务名或者服务别名进行连接来排除服务名或者服务别名的问题。

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。