Deep Diving into Dapr Workflows and OpenTelemetry – Tracing the Invisible Parts of Asynchronous Communication

Tracing asynchronous workflows is one of the hardest observability problems to solve. In this post, we dive deep into how Dapr Workflows actually execute, why distributed tracing breaks across long-lived gRPC streams, and how we fixed it using OpenTelemetry and W3C Trace Context. The result: a single, end-to-end trace that follows a request from the frontend, through workflow orchestration, all the way to activity code and outbound calls—without requiring developers to write custom tracing logic.