Hystrix Dashboard Issue in Spring Boot

[Micheal John John]

I am new to Hystrix Dashboard. I have written sample application with Hystrix.
I want to see the Hystrix chart (command metric stream). But I am getting the below error:

Circuit: Unable to connect to Command Metric Stream
Thread Pools: Loading...

I am using STS with Maven.

Below is the code used:

Simple server microservice application (Spring boot web running in port 8085)

			package hello;

				import org.springframework.boot.SpringApplication;
				import org.springframework.boot.autoconfigure.SpringBootApplication;
				import org.springframework.web.bind.annotation.RestController;
				import org.springframework.web.bind.annotation.RequestMapping;

				@RestController
				@SpringBootApplication
				public class BookstoreApplication {

				  @RequestMapping(value = "/recommended")
				  public String readingList(){
				    return "Spring in Action (Manning), Cloud Native Java (O'Reilly), Learning Spring Boot (Packt)";
				  }

				  public static void main(String[] args) {
				    SpringApplication.run(BookstoreApplication.class, args);
				  }
				}

Simple client  microservice application (Spring boot web running in port 8095) I have included the dependency of Hystrix and Hystrix Dashboard along with Web, so all the Hystrix dependencies are in classpath

	package hello;

				import com.netflix.hystrix.contrib.javanica.annotation.HystrixCommand;
				import org.springframework.stereotype.Service;
				import org.springframework.web.client.RestTemplate;

				import java.net.URI;

				@Service
				public class BookService {

				  private final RestTemplate restTemplate;

				  public BookService(RestTemplate rest) {
				    this.restTemplate = rest;
				  }

				  @HystrixCommand(fallbackMethod = "reliable")
				  public String readingList() {
				    URI uri = URI.create("http://localhost:8090/recommended");

				    return this.restTemplate.getForObject(uri, String.class);
				  }

				  public String reliable() {
				    return "Cloud Native Java (O'Reilly)";
				  }

				}

package hello;

				import org.springframework.boot.SpringApplication;
				import org.springframework.boot.autoconfigure.SpringBootApplication;
				import org.springframework.boot.web.client.RestTemplateBuilder;
				import org.springframework.context.annotation.Bean;
				import org.springframework.web.bind.annotation.RestController;
				import org.springframework.web.bind.annotation.RequestMapping;
				import org.springframework.beans.factory.annotation.Autowired;
				import org.springframework.cloud.client.circuitbreaker.EnableCircuitBreaker;
				import org.springframework.web.client.RestTemplate;

				@EnableHystrixDashboard
				@EnableHystrix
				@EnableCircuitBreaker
				@RestController
				@SpringBootApplication
				public class ReadingApplication {

				  @Autowired
				  private BookService bookService;

				  @Bean
				  public RestTemplate rest(RestTemplateBuilder builder) {
				    return builder.build();
				  }

				  @RequestMapping("/to-read")
				  public String toRead() {
				    return bookService.readingList();
				  }

				  public static void main(String[] args) {
				    SpringApplication.run(ReadingApplication.class, args);
				  }
				}

By running the above code, the hystrix is working fine, when the BooKStoreApplication is down, it is going to fallback method.

Both the urls are working fine.

Normal Case:

http://localhost:8085/recommended
Output: Spring in Action (Manning), Cloud Native Java (O'Reilly), Learning Spring Boot (Packt)

http://localhost:8095/to-read
Output: Spring in Action (Manning), Cloud Native Java (O'Reilly), Learning Spring Boot (Packt)

When BookStoreApplication is down (http://localhost:8085/recommended) accessing http://localhost:8095/to-read returns "Cloud Native Java (O'Reilly)" as expected.

But when I tried to invoke this url http://localhost:8095/hystrix, I am getting the Hystrix DashBoard Page and asking for the stream value.

I have tried given http://localhost:8095/ or http://localhost:8095/to-read, and clicked "Monitor Stream" and it is going to next page with error:

		Circuit: Unable to connect to Command Metric Stream
				Thread Pools: Loading...