Even though a device, upon creation, is known to the Manager, it is not a managed device until it is added to a ManagedSet.
即使一个Device(上面创建的)是Manager所熟悉的,在它被添加到一个ManagedSet之前是不能管理设备的。
This abnormal shutdown prevents the device from being managed by another manager instance.
这种异常关闭阻止设备被另一个管理员实例管理。
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