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I suspect the problem is that the topic name is not simply "test", but some string that has a prefix which associates it with IoT services. I can't find any documentation to this effect, though.
Hi Frank. There is no prefix, so something else must be going on. You can both publish and subscribe within the console's MQTT client to confirm this.
Could it be that your Java client has connected to the endpoint for a different region?
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Thanks, it turned out I had an authentication problem that I didn't notice because I wasn't waiting for the connection to complete. Once I did that, I could see what was wrong and when I fixed it, the queues worked as I was expecting.