In a hub-and-spoke multi-agent architecture, what structural weakness — Agentic Systems Engineer Practice — Claude Cert Academy

In a hub-and-spoke multi-agent architecture, what structural weakness can cause a complete system failure?

• Worker agents become unavailable when overloaded
• The hub becomes a single point of failure — if it crashes, all task routing stops
• Worker agents cannot communicate directly, so latency is always higher than in swarms
• The spoke topology prevents horizontal scaling beyond 10 workers

Answer: The hub becomes a single point of failure — if it crashes, all task routing stops

In hub-and-spoke architectures, all task routing flows through the central hub (coordinator). If the hub crashes or becomes unavailable, no worker agent receives tasks, and the entire system halts. This is a fundamental structural weakness of centralized coordination. Worker unavailability is a partial failure; the system degrades but does not halt entirely. Latency and scaling limits are operational concerns, not structural failure modes.

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