Since exchange are named entities the attempt to declare a previously existing exchange with a different type results in an error.
因为交换器是命名实体,所以声明一个已经存在的交换器,但是试图赋予不同类型是会导致错误。
The measurement error may well offset the effectiveness of carbon exchange.
其误差足以抵消交易机制的有效性。
Passive exchanges and queues will not be redeclared, but the broker will throw an error if the exchange or queue does not exist.
被动模式的交换机和队列不能被重新定义,但是如果交换机和队列不存在,代理将扔出一个错误提示。
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