Executive Summary
Synchronous HTTP call-chains between internal services create cascading failure domains, tight coupling, and difficult rollbacks. For small-to-midsize engineering teams, microservice hype frequently outpaces operational capabilities.
The Perils of Synchronous Service Chains
When Service A calls Service B, which sequentially queries Service C, overall system availability is the product of individual service availabilities. A 99.9% uptime across four sequential dependencies degrades effective uptime to 99.6%.
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