Microservices - Resilience Patterns
A developer implemented a circuit breaker but notices it never transitions from OPEN to HALF_OPEN. What is the most likely cause?
A developer implemented a circuit breaker but notices it never transitions from OPEN to HALF_OPEN. What is the most likely cause?
medium📝 Analysis Q14 of 15
Step-by-Step Solution
Solution:
Step 1: Understand OPEN to HALF_OPEN transition
The circuit breaker moves from OPEN to HALF_OPEN after a timeout period to test recovery.Step 2: Identify cause of no transition
If the timeout is missing or set too long, the breaker stays OPEN indefinitely.Final Answer:
The timeout to switch from OPEN to HALF_OPEN is missing or too long -> Option AQuick Check:
Missing timeout blocks OPEN -> HALF_OPEN transition [OK]
Quick Trick: Check timeout settings for OPEN to HALF_OPEN switch [OK]
Common Mistakes:
MISTAKES- Assuming success of service calls affects OPEN state
- Confusing CLOSED and OPEN states
- Ignoring timeout mechanism
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