Hystrix dashboard stucks on loading screen - hystrix

Question

I have Hystrix dashboard running on localhost:8988/hystrix and I want to monitor a request between OrderService and ProductService . The endpoint "hystrix.stream" is already registered and the hystrix dashboard stucks on loading without any results.
This is the service client to call Product Service which I want to monitor:
#Service
public class ProductServiceClient {
private final RestTemplate restTemplate;
public ProductServiceClient(RestTemplate restTemplate) {
this.restTemplate = restTemplate;
}
#HystrixCommand(fallbackMethod = "getDefaultProductById")
public Optional<ProductDto> getProductById(Long productId) {
ResponseEntity<ProductDto> productResponse = restTemplate
.getForEntity("http://product-service/api/product/{id}",
ProductDto.class,
productId);
if (productResponse.getStatusCode() == HttpStatus.OK) {
return Optional.ofNullable(productResponse.getBody());
} else {
log.error("Unable to get product with ID: " + productId
+ ", StatusCode: " + productResponse.getStatusCode());
return Optional.empty();
}
}
Optional<ProductDto> getDefaultProductById(String productId) {
log.info("Returning default ProductById for product Id: " + productId);
ProductDto productDto = new ProductDto();
productDto.setId(productId);
productDto.setName("UNKNOWN");
productDto.setDescription("NONE");
return Optional.ofNullable(productDto);
}
}
I added the #EnableCircuitBreaker annotation to the main class and I use these dependencies:
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-config</artifactId>
<version>2.1.1.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
<version>2.1.1.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-hystrix</artifactId>
<version>2.1.1.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-openfeign</artifactId>
<version>2.1.1.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-sleuth</artifactId>
<version>2.1.1.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-zipkin</artifactId>
<version>2.1.1.RELEASE</version>
</dependency>

Answer 1

Issue
In my case, the error occurs after upgrade spring-cloud to Hoxton.SR6.
In browser console, get following error:
Uncaught TypeError: e.indexOf is not a function
which seems to be a jquery version issue.
Solution
Downgrade spring-cloud version to Hoxton.SR4, then the error is gone.
So, you might need to check your browser's console output to see whether there are errors.
Tips
Another possible reason is that you didn't access your application's api which is marked by #HystrixCommand yet.
In that case, make a call to the api, then the dashboard would show the charts.

Answer 2

Try sending some requests by calling the controller.
If there are no requests then the dashboard will keep loading.