由于支持故障转移，所以在rac端完成恢复后(即已为业务打开Oracle rac)，Oracle JDBC驱动程序将从rac - node2提供连接。
Since failover is enabled, the Oracle JDBC driver will provide the connection from rac-node2 after recovery is done on the rac side (that is, Oracle rac is open for business).
在失败的事件中，客户端应用一旦重新连接上服务器就可以恢复已订阅的数据。
In the event of a failure, client applications can recover the subscribed data once they reconnect to the server.
在给定的节点上停止所有的集群成员，使应用程序客户端恢复到其他节点上的集群成员。
Stop all cluster members on a given node, enabling the application clients to failover to cluster members on other nodes.
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