@CircuitBreaker annotation does not works with a @FeignClient annotation

Hi,

I have created a FeignClient (using resilience4j-spring-boot2 and resilience4j-feign) as follows

 @FeignClient(name = "myFeignClient", url = "localhost:8080/resilience4j")
 @CircuitBreaker(name = "MyFeignClient", fallbackMethod = "fallBack")
 public interface MyFeignClient {
 
     @GetMapping(path = "/errorAlways")
     String feignMessage();
 
     default String fallBack() {
         return "This is a fallback";
     }
}

And I have used the following properties in application.yml

  configs:
    default:
      registerHealthIndicator: true
      ringBufferSizeInClosedState: 4
      ringBufferSizeInHalfOpenState: 2
      automaticTransitionFromOpenToHalfOpenEnabled: true
      waitDurationInOpenState: 20s
      failureRateThreshold: 50
      eventConsumerBufferSize: 10
      ignoreExceptions:
        - com.resilience4j.exception.BusinessException

The issue is that the @CircuitBreaker annotation have no impact when I keep it on my FeignClient. But if I create a normal Spring configuration like below, the circuit breaking operations works fine:

    @Bean
    public MyFeignClient myFeignClient() {
        CircuitBreaker circuitBreaker = CircuitBreaker.of("myFeignClient", CircuitBreakerConfig.custom()
                .ringBufferSizeInClosedState(4)
                .failureRateThreshold(50)
        .ringBufferSizeInHalfOpenState(2)
        .waitDurationInOpenState(Duration.ofSeconds(20))
        .build());
        FeignDecorators decorators = FeignDecorators.builder()
                .withCircuitBreaker(circuitBreaker)
                .withFallback(MyFeignClient.class)
                .build();
        return Resilience4jFeign.builder(decorators).contract(new SpringMvcContract())
                .target(MyFeignClient.class, "http://localhost:8080/resilience4j");
    }

Is it a bug with @CircuitBreaker annotation or it is designed to be used this way only?

PS: Please note that the annotation works perfectly fine when I use it on any normal service class.

[RobWin]

Hi, the annotation can’t be used together with Feign, at the moment…

You can only use Resilience4jFeign in your code. But you should inject the CircuitBreakerRegistry to retrieve a CircuitBreaker instance. That way you can still configure the CircuitBreakers in your Spring Boot application.yml file.

[harishmbm]

Submitted the PR here