如何解决“服务超时且没有可用的备用”错误Zuul

Question

我正在尝试通过Zuul代理将请求路由到Spring Cloud Eureka发现的REST服务。

#CandidateRESTAPI

@RestController

@RequestMapping(value = "/api/candidates")

public class CandidatRestAPI {

    @PostMapping

    @ResponseStatus(HttpStatus.CREATED)
    public ResponseEntity<Candidate> createCandidat(@RequestBody Candidate candidate){
        return new ResponseEntity<>(candidatService.addCandidat(candidate) , HttpStatus.OK);
    }

    @PutMapping(value = "/{id}" , produces = MediaType.APPLICATION_JSON_VALUE)
    @ResponseStatus(HttpStatus.OK)
    public ResponseEntity<Candidate> updateCandidat(@PathVariable(value = "id") int id , @RequestBody Candidate candidate){
        return new ResponseEntity<>(candidatService.updateCandidat(id, candidate), HttpStatus.OK);
    }

    @DeleteMapping(value="/{id}" , produces = MediaType.APPLICATION_JSON_VALUE)
    @ResponseStatus(HttpStatus.OK)
    public ResponseEntity<String> deleteCandidate(@PathVariable(value = "id") int id){
        return new ResponseEntity<>(candidatService.deleteCandidat(id), HttpStatus.OK);
    }
}

----------------------------------------------------

#Service Candidate : Application.properties
spring.application.name=candidat_service

eureka.client.service-url.default-zone=http://localhost:8761/eureka-server

eureka.client.register-with-eureka=true


#Eureka server : application.properties

spring.application.name=eureka-server

server.port=8761

eureka.client.register-with-eureka=false

eureka.client.fetch-registry=false

#Eureka server : Function

@SpringBootApplication

@EnableEurekaServer

public class EurekaServerApplication {

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

}

-----------------------------------------------------------

#ZuulProxy : application.properties

spring.application.name=zuul-gateway

server.port=8762

eureka.instance.prefer-ip-address=true

eureka.client.register-with-eureka=true

eureka.client.fetch-registry=true

eureka.client.service-url.default-zone=http://localhost:8761/eureka-server


zuul.routes.job-service.path=/job_service/*

zuul.routes.job-service.service-id=job_service


zuul.routes.candidat-service.path=/candidat_service/*

zuul.routes.candidat-endpoint.service-id=candidat_service

zuul.routes.candidat-service.service-id=candidat_service

#ZuulProxy : function 

@SpringBootApplication

@EnableDiscoveryClient

@EnableZuulProxy

public class GatewayApplication {

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

}

我希望使用zuul访问候选服务，但是我遇到了超时错误：

候选服务超时，没有可用的后备