Resilient Retries, Circuit Breakers, and Bulkheads

Overview

Polly-style patterns are easy to cargo-cult. Here you tune jittered backoff, half-open probes, and bulkhead pools against simulated slow dependencies. You will read graphs, not slogans, and write postmortems that cite actual integration timelines.

What you practice

• Retry budget simulator with competing clients
• Circuit breaker tuning against flaky HTTP mocks
• Bulkhead pool sizing spreadsheet you can reuse
• Thread-pool vs async IO tradeoff lab
• Operator dashboard fields for half-open transitions
• Chaos session with controlled dependency latency

Outcomes

• Pick backoff parameters with written rationale
• Tune a breaker for a partner SLA document you provide
• Draft an integration incident narrative with graphs