我正在使用 Spring Boot 1.3.3
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.3.3.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
Edit
我正在使用 Brixton.RC1 作为我的 Spring Cloud 依赖项
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>Brixton.RC1</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
我的应用程序是使用这些注释设置的:
@EnableDiscoveryClient
@SpringBootApplication
public class Application {
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
}
我有一个带有服务的休息控制器:
@RestController
public class MyController {
@Autowired
private MyService myService;
在我的服务中,我尝试使用自动连接的休息模板来调用另一个尤里卡注册服务。
@Service
public class MyServiceImpl {
private final ParameterizedTypeReference<Answer> ANSWER = new ParameterizedTypeReference<Answer>() {};
@Autowired
private DiscoveryClient discoveryClient; //just here for testing
@Autowired
private RestTemplate restTemplate; //
public String someCoolMethod(String input){
log.info("Instance available? " + isInstanceAvailable());
final RequestEntity<String> requestEntity = RequestEntity.post(URI.create("http://myotherservice/othermethod")).accept(MediaType.APPLICATION_JSON).body(input);
final ResponseEntity<String> response = this.restTemplate.exchange(requestEntity, ANSWER);
log.info(response);
return response.getBody();
}
private Boolean isInstanceAvailable(){
List<ServiceInstance> instances = discoveryClient.getInstances("myotherservice");
for(ServiceInstance si : instances){
log.info(si.getUri().toString());
}
return instances.size() > 0;
}
}
我完全困惑了,因为我在另一个项目中工作了。这也是输出:
INFO http://192.168.1.10:1234
INFO Instance available? true
ERROR I/O error on POST request for "http://myotherservice/othermethod": myotherservice; nested exception is java.net.UnknownHostException: myotherservice
所以我可以看到这两个服务都注册到了 Eureka。 MyService 能够:
- 向尤里卡注册
- 查询尤里卡“myotherservice”
- 使用正确的主机和端口获得有效响应
但自动装配的 RestTemplate 抛出 UnknownHostException。