springboot2.2.2下hystrix.stream 404

问题描述

使用Spring Cloud Hoxton.SR1时，尝试断路器（hystrix）功能，在使用hystrix dashboard仪表盘时，页面总是Unable to connect to Command Metric Stream。如图所示：

Spring Boot 2.0 下 hystrix.stream 404 问题

查看日志，显示hystrix.stream 404：

2018-04-24 20:26:54.480  WARN 2170 --- [nio-8091-exec-2] ashboardConfiguration$ProxyStreamServlet : Failed opening connection to http://localhost:8091/hystrix.stream?delay=100 : 404 : HTTP/1.1 404 

解决方案

在Application类中增加如下代码可以解决404问题

@Bean
public ServletRegistrationBean getServlet() {
      HystrixMetricsStreamServlet streamServlet = new HystrixMetricsStreamServlet();
      ServletRegistrationBean registrationBean = new ServletRegistrationBean(streamServlet);
      registrationBean.setLoadOnStartup(1);
      registrationBean.addUrlMappings("/hystrix.stream");
      registrationBean.setName("HystrixMetricsStreamServlet");
      return registrationBean;
}