摘要：
OERR: ORA-12519 TNS:no appropriate service handler found客户端连接间歇性失败，报错ORA-12519Cause: the listener could not find any available service handlers that are appropriate for the client connection.Action: 检查lsnrctl service ，instance已经注册，状态显示ready时，可以连接。When the listener believes the current number of conn 阅读全文
