使用版本：
<spring.cloud.version>Hoxton.SR7</spring.cloud.version>
<spring.boot.version>2.3.2.RELEASE</spring.boot.version>
当输入URL并且点击Monitor Stream按钮后界面出现：
Unable to connect to Command Metric Stream.
并且在控制台输出如下信息：
ashboardConfiguration$ProxyStreamServlet : Origin parameter: http://localhost:18000/actuator/hystrix.stream is not in the allowed list of proxy host names. If it should be allowed add it to hystrix.dashboard.proxyStreamAllowList.
解决办法：
（1）被监视项目中使用如下配置：
package hystrix.feign.consumer7.config;import com.netflix.hystrix.contrib.metrics.eventstream.HystrixMetricsStreamServlet;
import org.springframework.boot.web.servlet.ServletRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;@Configuration
public class JavaConfig {@Beanpublic ServletRegistrationBean getServlet() {HystrixMetricsStreamServlet streamServlet = new HystrixMetricsStreamServlet();ServletRegistrationBean registrationBean = new ServletRegistrationBean(streamServlet);registrationBean.setLoadOnStartup(1);registrationBean.addUrlMappings("/actuator/hystrix.stream");//访问路径registrationBean.setName("hystrix.stream");return registrationBean;}
}
（2）监视项目使用如下配置：
hystrix:dashboard:proxy-stream-allow-list: "*"
即可解决。
正常运行的效果如下：