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One JSON blob born at Pacco's gateway rides the Correlation-Context HTTP header into services and the message_context AMQP header across the bus, surfacing in SignalR pushes - carried by a class copy-pasted into eleven repos and a broker that forwards exactly one header.
FeedR threads a correlation ID from a YARP transform through HTTP middleware and into Pulsar message metadata - and quietly loses it at the Redis hop in the middle. Tracing exactly where the chain holds and where it breaks is the best observability lesson in the sample. Part 8 of the FeedR deep dive.
How Convey stitched one Jaeger trace across HTTP, a command handler and a RabbitMQ hop years before OpenTelemetry - and the six-line catch block in its tracing plugin that can silently eat your failures.
