1.找不到交换机exchange
Channel shutdown: channel error; protocol method: #
method<channel.close>(reply-code=404, reply-text=NOT_FOUND - no exchange 'amq.direct' in vhost 'testhost', class-id=60, method-id=40)
原因：查看下图红框中是否有exchange ‘amq.direct’，没有则会报错，添加即可
2.同一个Vhost下不可添加相同类型（Type）的exchange
channel is already closed due to channel error; protocol method: #
method(reply-code=406, reply-text=PRECONDITION_FAILED - cannot switch from tx to confirm mode, class-id=85, method-id=10)
原因：添加相同类型（Type）的exchange
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