spring-cloud-feign-hystrix-timeout-problem

StackOverflow question: Spring Cloud Feign client with Hystrix circuit-breaker timeout defaults in 2 seconds.

Problem

The configured Feign client and Hystrix on unavailable endpoint falls correctly to fallback, however too early, after 2 seconds although the configuration (application.yml) says different:

feign:
  client:
    config:
      default:
        connectTimeout: 5000
        readTimeout: 5000
  hystrix:
    enabled: true
    
hystrix:
  command:
    default:
      execution:
        timeout:
          enabled: true
        isolation:
          thread:
            timeoutInMilliseconds: 60000

How to reproduce

1. Make sure nothing runs on localhost:8080 (this application) and localhost:9090 ( used as a "unavailable service")
2. Run the Spring Boot application org.example.Application. It starts on the default port 8080.
3. Call the following CURL:

   curl --request GET --url http://localhost:8080/feign/api/dto
   

The result might be the following log which clearly shows that the fallback was triggered too way early in 2 seconds however it is configured to 5.

• Calling feign client is logged right after calling the CURL invoking MyRestController::get.
• Fallback is logged right after the request falls into fallback MyFallbackFactory::create.

2020-08-10 19:19:04.254  INFO 15368 --- [nio-8080-exec-2] org.example.MyRestController             : Calling feign client
2020-08-10 19:19:06.276  INFO 15368 --- [trix-my-feign-2] org.example.MyFallbackFactory            : Fallback
2020-08-10 19:19:06.277  INFO 15368 --- [trix-my-feign-2] org.example.MyFallbackFactory            : Fallback caught FeignException, no status
2020-08-10 19:19:06.287 ERROR 15368 --- [nio-8080-exec-2] o.a.c.c.C.[.[.[/].[dispatcherServlet]    : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is com.netflix.hystrix.exception.HystrixRuntimeException: MyFeignClient#getDto() failed and fallback failed.] with root cause

java.net.ConnectException: Connection refused: connect
	at java.base/java.net.PlainSocketImpl.waitForConnect(Native Method) ~[na:na]
	at java.base/java.net.PlainSocketImpl.socketConnect(PlainSocketImpl.java:107) ~[na:na]
	at java.base/java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:399) ~[na:na]
    ...