com.netflix.hystrix.contrib.javanica.exception.FallbackDefinitionException

源代码：

/**
 * @Author: 98
 * @Date: 2019-8-29 20:23
 */
@RestController
public class DemoController {

    @Reference(version = "${user.service.version}")
    private DemoService demoService;

    @HystrixCommand(fallbackMethod = "hiHystrix")
    @GetMapping("hi/{name}")
    public String sayHi(@PathVariable("name") String name){
        //return demoService.sayHello(name);
        throw  new RuntimeException("熔断触发");
    }

    public String hiHystrix(){
        return "Hello Hystrix";
    }

}

异常信息：

错误原因

从异常信息可以知道，Hystrix的熔断回调方法无法找到，但是@HystrixCommand(fallbackMethod = “hiHystrix”)也配置了回调的方法名。

最后发现Hystrix熔断回调方法的参数列表需要和熔断方法的参数列表相同，把两个方法的参数列表修改一致即可！！！

/**
 * @Author: 98
 * @Date: 2019-8-29 20:23
 */
@RestController
public class DemoController {

    @Reference(version = "${user.service.version}")
    private DemoService demoService;

    @HystrixCommand(fallbackMethod = "hiHystrix")
    @GetMapping("hi/{name}")
    public String sayHi(@PathVariable("name") String name){
        //return demoService.sayHello(name);
        throw  new RuntimeException("熔断触发");
    }

    public String hiHystrix(@PathVariable("name") String name){
        return "Hello Hystrix";
    }
}

重新启动服务提供者和服务调用者，通过api方法成功！！