Design Microservices Architecture with Patterns and Principles - Retry + Circuit Breaker Pattern

The video tutorial explains the use of circuit breaker and retry patterns in microservice architecture. It begins with an introduction to both patterns, followed by a detailed implementation of the retry pattern. The limitations of the retry pattern are discussed, especially when microservices are unresponsive. To address these issues, the circuit breaker pattern is introduced, which prevents repeated failed requests by blocking traffic to down services. The mechanism of the circuit breaker is explained, including its periodic checks to determine service availability. Finally, the tutorial demonstrates how to combine both patterns to enhance system reliability and performance.

What is a potential risk of using the retry pattern when a microservice is completely down?

• It will improve the service availability.

• It may cause resource exhaustion and irrelevant failures.

• It ensures all requests are eventually successful.

• It can lead to increased response times.

How does the circuit breaker pattern help when a service is down?

• It increases the number of retries.

• It redirects requests to another service.

• It opens the circuit to prevent further requests.

• It retries the request indefinitely.

What is the purpose of the circuit check time in the circuit breaker pattern?

• To increase the response time.

• To periodically check if the service is back up.

• To decrease the number of failed requests.

• To determine the number of retries.

In what way does the retry pattern differ from the circuit breaker pattern?

• Retry pattern attempts to succeed after an exception.

• Circuit breaker pattern retries indefinitely.

• Retry pattern prevents broken communication.

• Circuit breaker pattern ensures all requests succeed.

Why is it beneficial to use both retry and circuit breaker patterns together?

• To ensure all requests are successful.

• To handle performance issues and ensure reliable communication.

• To decrease the response time.

• To increase the number of retries.