[AWS IOT CORE] Got unexpected status 426 with statusLine:HTTP/1.1 426 Upgrade Required

[Sylvain V]

Hello,

Context:

I’m trying to use Jmeter for some tests on my AWS iot core MQTT server.

I’m connecting on it using “wss” (MQTT over WSS)

Error:

“Upgrade” header seems to be correctly set (based on debug log levels)

Do you have an idea how to fix this, please?

Thanks !

[Peter Doornbosch]

Does the server not send a Upgrade header to indicate the required protocol? This would help to understand what’s going on.

[Peter Doornbosch]

Maybe you need to specify MQTT as (ws) subprotocol.

According to http://docs.oasis-open.org/mqtt/mqtt/v3.1.1/os/mqtt-v3.1.1-os.html#_Toc398718127 it should.

[Sylvain V]

Hello!
Thanks for your reactivity!

Your guess was right (to specify “mqtt” in the headers)

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After adding that, everything worked perfectly !

Thanks for your help :)

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[Peter Doornbosch]