Interactive 3-State FSM Debugger & Probing Engine
Normal State
CLOSED
Requests execute downstream. Errors tracked in sliding ring buffer.
Trip Rule:>=50% fail
Tripped State
OPEN
Downstream protected! Invocations short-circuit directly to fallback in <1ms.
Cooldown:5s
Canary Probing
HALF-OPEN
Permitted trial calls probe downstream recovery. Single failure re-opens.
Trial Budget:3 trial calls
Inspection Target:CLOSED
Threshold condition: Trips to OPEN if failure rate exceeds 50% and call volume satisfies >=10 calls. Currently at 0% across 0 calls.
Failure RateThreshold: 50%
0%(0 / 0 calls)
Slow Call Rate>1500ms
0%(0 calls)
Calls Short-Circuited
0Shed load returned in <1ms
Thread pool exhaustion eliminatedBlast Radius Contained
0%Normal downstream pass-through
State: CLOSEDDispatch Invocations
Single Request
Automated Workloads (15 Calls)
Trip Failure Threshold50%
Open State Cooldown5s
Half-Open Trial Probes3
State Transition Audit StreamClick event to inspect trigger
Circuit breaker has remained in initial CLOSED state. No state migrations triggered.
Recent Invocations (0)
Last 200 calls cachedNo requests dispatched yet. Use the buttons on the left to trigger invocations.
Export Production Breaker Configurations
Production-grade configurations for Resilience4j, Polly, Opossum, and Go-Hystrix using current thresholds.
# Resilience4j Circuit Breaker (application.yml)
resilience4j.circuitbreaker:
instances:
paymentService:
slidingWindowType: TIME_BASED
slidingWindowSize: 10
minimumNumberOfCalls: 10
failureRateThreshold: 50
slowCallRateThreshold: 50
slowCallDurationThreshold: 1500ms
waitDurationInOpenState: 5000ms
permittedNumberOfCallsInHalfOpenState: 3
automaticTransitionFromOpenToHalfOpenEnabled: true
ignoreExceptions:
- com.aventine.exception.ClientBadRequestExceptionPreventing Retries From Becoming Thundering Herds
Circuit breakers stop backend collapse, but callers who retry immediately without exponential backoff or token bucket rate limiting will overwhelm services the moment the breaker attempts to HALF-OPEN.