Load balancer does not have available server for client

Question

I\'m trying to use Feign client. Below is my feing client:

import com.eprogrammerz.examples.domain.Movie;
import org.springframework.cloud.netflix.feign.Feig         


        

Answer 1

If your Spring Cloud set up does not support specifying the servers in application.properties/application.yml, you have to configure the services URL in a Configuration class.

Pls, note the warning message in my application.properties [Spring Boot v2.0.0RELEASE, spring-cloud-starter-feign & spring-cloud-starter-ribbon v 1.4.3.RELEASE]

So what I did was to write a Configuration class as follows:

@Configuration
class LocalRibbonClientConfiguration {
    @Bean
    public ServerList ribbonServerList() {
        // return new ConfigurationBasedServerList();
        StaticServerList staticServerList = new StaticServerList<>((new Server("localhost", 8001)),
                new Server("localhost", 8000));
        return staticServerList;
    }
}

Then, configured the Spring Boot Application to use this configuration as follows:

@SpringBootApplication
@EnableFeignClients("my-package.currencyconversionservice")
@RibbonClient(name = "currency-conversion-service", configuration = LocalRibbonClientConfiguration.class)
public class CurrencyConversionServiceApplication {
 // nothing new here...
}

No need to change the Feign Proxy class. Posting just for this post to be served as a complete solution to the problem:

@FeignClient(name="currency-exchange-service")
@RibbonClient(name="currency-exchange-service")
public interface CurrencyExchangeServiceProxy {
    @GetMapping("/currency-exchange/from/{from}/to/{to}")
    public CurrencyConversionBean retrieveExchangeValue(@PathVariable("from") String from, @PathVariable("to") String to);
}

That's all. The problem was fixed.