MQTT Subscribe Error

[ZhangArt]

I use tsung1.7.0 as mqtt client to connect to thingboard and connect msg is ok, but the subscribe message is liked this: MqttMessage[fixedHeader=, variableHeader=, payload=], no any useful parameters. xml is

   <thinktime value="10" />
        <request subst="true">
            <mqtt type="subscribe" topic="test_topic" qos="1"></mqtt>
        </request>

<request>
    <!-- wait for 60s -->
    <mqtt type="waitForMessages" timeout="60"></mqtt>
</request>

<request subst="true">
    <mqtt type="unsubscribe" topic="test_topic"></mqtt>
</request>

    </session>

How can I use subscribe function?

[ZhangArt]

Netty error is io.netty.handler.codec.DecoderException: SUBSCRIBE message must have QoS 1. Actually, I have added qos='1'.

[caijinfa-jm]

Did you solve it?