I want to use ALPN protocol. But when I connect via passing this protocol name “x-amzn-mqtt-ca”, then mqtt does not connect and return this error
com.hivemq.client.mqtt.exceptions.ConnectionFailedException: java.lang.IllegalArgumentException: protocol x-amzn-mqtt-ca is not supported.
Hi @ranaaamer ,
Nice to see you back on your community forum! ALPN is not supported with the HiveMQ MQTT client or broker. The application layer protocol is always MQTT. I’m curious: What is your use case of trying to use ALPN?
Best, Florian
Because on some network, 8883 port blocked. So I want to 443 port. Can you tell me how we can use MQTT over WebSocket using header and token?