How can I configure Spring Boot 3 with Micrometer and Spring Stream (with RabbitMQ) that does not separate trace HTTP and MQ in Zipkin?

Question

I configured a basic Spring Boot with Micrometer and Spring Stream (with RabbitMQ). I would like to configure that traceId can be passed into another service through Spring Stream.

I understand it loses trace info when I use tryNextEmit. So it will generate a new. I also understand, RabbitMQ messages get a "traceparent" header with "00-xxxxxx-xxx-01" new value.

So my question: How can I connect both traces that Spring Stream uses older trace information and one record appear in Zipkin?

Example code: https://github.com/Numichi/stackoverflow-question-micrometer-with-stream

Answer 1

Use StreamBridge to send the message to Cloud Stream bindings instead of using Sink. As you have mentioned, Sink does not allow Observation Context to propagate. I am not aware of any direct way of propagating the context when using sinks which will allow parent Observation to be passed down.

If you send message to Stream binding using streambridge.send then message to rabbitMQ comes under parent observation as expected and shown below