一个Pub发布，Sub订阅的 Response Body 有重复的消息，导致Beanshell断言失败

[tiandikuan]

使用Jmeter做MQTT设备的接口测试；添加MQTT Sub Sampler(Payload内容正确)，MQTT Sub Sampler订阅的 Response Body 有重复的消息，导致Beanshell断言失败；然后查看设备及MQTT Broker返回的消息只有1条。

例：设备只返回1条信息，MQTT Broker上面看大的也是一条信息，Jmeter Response Body 显示3条一模一样的信息
{"reqId":3,"cmdId":"Lamp","cmdData":{at":"24-07-19 14:33:58","srcType":"CAT1","elec":{"current":0,"voltage":216,"factor":0,"power":0}}}
{"reqId":3,"cmdId":"Lamp","cmdData":{at":"24-07-19 14:33:58","srcType":"CAT1","elec":{"current":0,"voltage":216,"factor":0,"power":0}}}
{"reqId":3,"cmdId":"Lamp","cmdData":{at":"24-07-19 14:33:58","srcType":"CAT1","elec":{"current":0,"voltage":216,"factor":0,"power":0}}}