我使用的是春天啓動1.3.3春天開機自動裝配Autowired DiscoveryClient RestTemplate的UnknownHostException
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.3.3.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
編輯
我使用Brixton.RC1我春雲依賴
<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>
我的應用程序設置了這些註釋:
@EnableDiscoveryClient
@SpringBootApplication
public class Application {
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
}
我在它與服務休息控制器:
@RestController
public class MyController {
@Autowired
private MyService myService;
而在我的服務,我嘗試使用自動裝配Autowired休息模板調用另一個尤里卡註冊服務。
@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,因爲我在另一個項目中工作。這裏也是輸出:
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,這兩個服務都註冊了尤里卡。爲MyService能夠:
- 與尤里卡
- 查詢尤里卡寄存器 'myotherservice'
- 得到與正確的主機和端口
但是,自動裝配Autowired RestTemplate拋出的UnknownHostException有效響應。
您使用的是什麼版本的Spring Cloud?顯示您的春天雲依賴關係。您的'RestTemplate'未正確配置發現。 – spencergibb