ORA-15316: Previous client instance string has not fully exited.
Cause: One or more processes from a prior instantiation of this client were not fenced.
Action: Make sure all processes belonging to the client instance exited. Check the client alert log and the trace file of the process that terminated the instance.
ORA-15316 错误表明 Oracle 数据库在重新配置网络服务之前没有正确执行一个正在此网络服务上的客户实例。官方的说明是：
ORA-15316: Previous client instance string has not fully exited.
Cause: The error is raised when the Oracle server is trying to configure the requested service and finds that a previously used client instance is still running on the same service.
1. 检查是否有任何其他客户端实例运行
2. 关闭在该服务上运行的所有客户端实例
3. 重新配置相应的服务