seniorSpring
How does Spring Boot handle circuit breaker internal state transitions?
Updated May 17, 2026
Short answer
Circuit breakers transition between CLOSED, OPEN, and HALF-OPEN states based on failure thresholds.
Deep explanation
In Resilience4j, circuit breaker monitors failure rates. When threshold is exceeded, it opens to stop calls. After a wait period, it transitions to HALF-OPEN to test recovery. If successful, it closes again.
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