在阶段1，协调器沿着所有与该事务有关的参与者(在本实例中是Database - 1和Database - 2)的列表向下，请求每个参与者准备。
In Phase 1, the coordinator goes down the list of all participants (Database-1 and Database-2 in this example) who expressed interest in this transaction, asking each one to Prepare.
当完成指令被请求，一个协调器将向所有的事务参与应用程序发出一个Prepare消息。
When completion is requested, a coordinator sends any participant a Prepare-message.
这可能导致将请求路由到运行状况更好的服务器，从而导致协调应用服务器崩溃。
This can cause requests to be routed to healthier servers and result in coordinated application server crashes.
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