ORA-19550: cannot use backup/restore functions while using dispatcher

文档解释

ORA-19550: cannot use backup/restore functions while using dispatcher

Cause: Attempted to use backup/restore functions while connected to the dispatcher in a shared server. This is not allowed because the device that is used for backup and restore must remain allocated to a single process.

Action: Connect directly to the instance then re-execute the backup or restore function.

ORA-19550: cannot use backup/restore functions while using dispatcher错误是当一个数据库实例正在使用分发器时，不能使用备份/恢复功能，这是由于备份/恢复操作导致实例无响应，并且关闭分发器会中断客户机与数据库实例之间的连接。

官方解释

常见案例

一般处理方法及步骤

1、若需要进行备份/恢复操作，应首先关闭数据库实例上的分发器。

2、在分发器被关闭后，可以进行备份/恢复操作。

3、在操作完成后，可重新启动分发器以通知客户机和数据库实例之间的连接。