SpringCloud 消费请求Eureka调用服务提供者报错

SpringCloud 消费请求Eureka调用服务提供者报错

 

springCloud 2022.0.1

springboot 3.0.2

 

 

消费程序 通过eureka集群查询服务，根据eureka中注册的服务名称请求最终的服务，

//eureka 注册的服务名称， 
 public static final String PAYMENT_URL="http://PAYMENT-SERVICE";

@Resource
private RestTemplate restTemplate;

 

@RequestMapping("/consumer/payment/get/{id}")
    public CommonResult<Payment>   getPaymentById(@PathVariable("id") Long id)
    {

        return restTemplate.getForObject(PAYMENT_URL+"/payment/get/"+id

                ,CommonResult.class);
    }

报错：

java.net.UnknownHostException: PAYMENT-SERVICE
at java.base/sun.nio.ch.NioSocketImpl.connect(NioSocketImpl.java:560)
at java.base/java.net.Socket.connect(Socket.java:666)
at java.base/java.net.Socket.connect(Socket.java:600)
at java.base/sun.net.NetworkClient.doConnect(NetworkClient.java:183)
at java.base/sun.net.www.http.HttpClient.openServer(HttpClient.java:531)

 

在restTemplate bean上增加注解 @LoadBanlanced

@Configuration

public class AppContextConfig {
    @Bean
    @LoadBalanced
    public RestTemplate getRestTmp()
    {

        return new RestTemplate();

    }

}

 

原因：

服务有多个， 如果不开启负载均衡，eureka不知道是分配哪一个 ,会报这个错误 ERROR:java.net.UnknownHostException: