com.netflix.client.ClientExcepti

1.问题描述
再给feign客户端配置熔断器时报错。

2.代码展示

• application.properties文件

spring.application.name=feign-consumer
server.port=4444
eureka.client.serviceUrl.defaultZone=http://localhost:1111/eureka/
eureka.instance.prefer-ip-address=true
eureka.instance.instance-id=${spring.cloud.client.ip-address}:${server.port}

• 启动类

···

@EnableFeignClients
@EnableEurekaClient
@SpringBootApplication
public class SpringCloudFeignCusApplication {

    public static void main(String[] args) {
        SpringApplication.run(SpringCloudFeignCusApplication.class, args);
    }

}

• 控制器

···

@RestController
public class ConsumerController {

    @Autowired
    ComputeClient computeClient;

    @RequestMapping("/add")
    public Integer add(){
        return computeClient.add(10,20);
    }
}

• feign客户端

···

@FeignClient(value = "compute-service",fallback = ComputeClientHystrix.class)
public interface ComputeClient {

    @RequestMapping(value = "/add",method = RequestMethod.GET)
    Integer add(@RequestParam("a") Integer a,@RequestParam("b") Integer b);
}

• ComputeClientHystrix.class

···

@Component
public class ComputeClientHystrix implements ComputeClient {
    @Override
    public Integer add(@RequestParam("a") Integer a,@RequestParam("b") Integer b) {
        return -99999;
    }
}

3.解决办法
在application.properties文件中添加feign.hystrix.enabled=true,开启熔断器，默认为false。

4.页面访问
在关闭依赖服务（compute-service）后，访问http://localhost:4444/add,页面正常显示