ORA-12576: TNS:handoff not supported for this session
Cause: Handoff of a established session was attempted which either had tcps as its transport or NA options were enabled for this session.
Action: Check the transport setting as well as NA options. If error persists, contact Oracle Customer Support.
ORA-12576: TNS:handoff not supported for this session表示TNS连接失败，无法进行Handoff会话。
ORA-12576: TNS:handoff not supported for this session.
Cause: TNS failed to make the Handoff session.
Action: See trace file for further details.
在ORACLE运行中，客户端和服务器之间发生临时断开，但在客户端继续发送消息而服务器端发生变化后，可能会出现ORA-12576。
1.检查TNSNAMES.ORA文件和相关的服务配置，确保其中的配置信息正确无误。
2.检查服务器端是否被更新或发生变化，如果是，需要重新配置客户端的TNS信息；
3.使用tnsping进行客户端和服务器的连接测试，如果出现ORA-12576，则检查TNSNAMES.ORA文件或服务器端配置，并尝试重新配置；
5.重启ORACLE服务器，并确认客户端再正确连接服务器。