当代理释放器命令队列上的输入句柄时，则队列管理器检测到命令队列有一个大于0的深度，从而发出一个新的触发器事件，然后代理重新启动。

As soon as the agent releases the input handle on its command queue, the queue manager detects that the command queue has a depth greater than zero, fires a new trigger event, and the agent restarts.

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