BTW here is where I am getting stuck: I was assuming that brokers must somehow learn about consumers on other brokers. I looked at the code of org.apache.activemq.network.ConduitBridge and later org.apache.activemq.network.DemandForwardingBridge and it seemed to me that the means by which the brokers learn about consumers is by sending and receiving instances of org.apache.activemq.command.ConsumerInfo. So I put a breakpoint in org.apache.activemq.transport.TransportSupport#doConsume and I log every instance of ConsumerInfo. But I am only seeing ConsumerInfo's for some advisory topics and not for the topic which I am sending messages to. So either I don't have the tracing setup right or there is some other channel via which brokers exchange information about consumers.
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