After openfeign sets circuitbreaker=true, feign's readtimeout expires

Because I use 2021 Version of Cloud, So start on the main configuration class Hystrix The annotation of has been changed ,

@EnableCircuitBreaker obsolete , The solution can be seen directly at the end .

And yml The configuration mode of the file has also changed , The configuration is as follows ：

feign:
  client:
    config:
      default:
        connectTimeout: 5000
        readTimeout: 5000
  circuitbreaker:
    enabled: true

Open the annotation on the main configuration class @EnableHystrix( replace @EnableCircuitBreaker) 、@EnableFeignClients

@SpringBootApplication
@EnableFeignClients
@EnableHystrix
public class HystrixOpenFeign80 {
    public static void main(String[] args) {
        SpringApplication.run(HystrixOpenFeign80.class, args);
    }
}

Use @FeignClient Note on service Layer interface

@Component
@FeignClient(value = "CLOUD-PROVIDER-HYSTRIX-PAYMENT", fallback = PaymentHystrixServiceImpl.class)
public interface PaymentHystrixService {
   

When calling the specified service , The server takes time 3 second .

As a result, a service degradation call occurred fallback in PaymentHystrixServiceImpl Methods , That is to say, we configured readTimeout: 5000 It didn't work .

explain ： Actually readTimeout: 5000 It has come into effect, but there is another judgment .

I thought the call ：

By readTimeout To decide Feign Timeout of calling the server controller method , That's right , But before that, there is another place to determine whether the call timed out .

After the timeout DEBUG In the process of source code discovery ：

Created through the factory HystrixCircuitBreaker object

The conclusion is that ：Hystrix Timeout judgment of in Feign Timeout judgment time ,Hystrix The default timeout is 1 second .

So modify yml File to change Hystrix The default timeout of can solve the problem .

feign:
  client:
    config:
      default:
        connectTimeout: 5000
        readTimeout: 5000
  circuitbreaker:
    enabled: true

hystrix:
  command:
    default:
      execution:
        isolation:
          thread:
            timeoutInMilliseconds: 5000