RestTemplate 以 Spring Cloud 域名方式（http://application-name）实现负载均衡调用，错误信息：
Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed;
nested exception is org.springframework.web.client.ResourceAccessException: I/O error on GET request for "http://appblog-provider/add": appblog-provider;
nested exception is java.net.UnknownHostException: appblog-provider] with root cause
java.net.UnknownHostException: appblog-provider解决方法：加上@LoadBalanced
@Configuration
public class CommonConfig {
@Bean
@LoadBalanced //增加 load balance 特性
public RestTemplate restTemplate() {
ClientHttpRequestFactory factory = simpleClientHttpRequestFactory();
return new RestTemplate(factory);
}
public ClientHttpRequestFactory simpleClientHttpRequestFactory() {
SimpleClientHttpRequestFactory factory = new SimpleClientHttpRequestFactory();
factory.setReadTimeout(15000); //单位为ms
factory.setConnectTimeout(15000); //单位为ms
return factory;
}
}@Autowired
private RestTemplate restTemplate;