كيف تتتالى الأعطال

في هذا الدرس

see how one slow dependency takes down callers.

الموضوعات المخطط لها

• A slow service is worse than a dead one: callers wait, threads pile up, and pools fill.
• Little's law: concurrent requests = arrival rate × latency; latency rising 10× means 10× threads held.
• Once the caller's pool is full it fails for every endpoint, even those not using the slow dependency.
• Retries multiply load on the struggling service (retry storm).
• Defenses: timeouts, bounded retries, circuit breakers, bulkheads, fallbacks.