hystrix

基于springcloud的开发者实践:hystrix-dashboard熔断仪表盘

限于喜欢 提交于 2019-12-07 00:32:11
断路器仪表盘HystrixDashboard Hystrix-dashboard是一款针对Hystrix进行实时监控的工具,通过Hystrix Dashboard可以直观地看到各Hystrix Command的请求响应时间,请求成功率等数据。 1、 新建工程hystrix-dashboard pom.xml文件依赖如下 <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-netflix-hystrix</artifactId> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-netflix-hystrix-dashboard</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-actuator</artifactId> </dependency> 2、 开启HystrixDashBoard 在启动类中,添加

2.spring cloud服务注册中心eureka server---添加Hystrix Dashboard(第四章)

给你一囗甜甜゛ 提交于 2019-12-07 00:31:52
Hystrix Dashboard 本文中示例代码的引用版本: org.springframework.boot 版本 :2.1.0.RELEASE org.springframework.cloud 版本:Greenwich.M1 示例代码-码云 https://gitee.com/sharps/springcloud 我们在熔断示例项目spring-cloud-consumer-hystrix的基础上更改,重新命名为:spring-cloud-consumer-hystrix-dashboard。 1、添加依赖 org.springframework.boot 版本 :2.1.0.RELEASE org.springframework.cloud 版本:Greenwich.M1 < dependency > < groupId > org.springframework.cloud </ groupId > < artifactId > spring-cloud-starter-netflix-eureka-client </ artifactId > </ dependency > < dependency > < groupId > org.springframework.cloud </ groupId > < artifactId > spring-cloud

学习笔记:微服务-19 Hystrix-Turbine集成监控

感情迁移 提交于 2019-12-07 00:29:50
Turbine通过eureka可以收集集群的多个Hystrix短路器的状态数据,然后通过Hystrix Dashboard 展示集群的多个短路器状态,达到集中监控微服务运行状态的作用。 上节已经设置好了Hystrix Dashboard服务。 这节介绍turbine的安装使用 1. 新建spring boot项目 pom.xml增加依赖 <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-netflix-turbine</artifactId> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-netflix-turbine</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-actuator</artifactId> </dependency> 2. application.properties 配置 server.port:

Cannot disable Spring Cloud Config via spring.cloud.config.enabled:false

孤街醉人 提交于 2019-12-06 21:36:03
问题 Let me preface this by saying that I'm not using Spring Cloud Config directly, it is transitive via Spring Cloud Hystrix starter. When only using @EnableHystrix , Spring Cloud also tries to locate a configuration server, expectedly unsuccessfully, since I'm not using one. The application works just fine, as far as I can tell, but the problem is in the status checks. Health shows DOWN because there is no config server. Browsing the source of the project, I'd expect spring.cloud.config.enabled

Hystrix and Turbine does not work with Spring boot 2 and Spring cloud Finchley.M8

你离开我真会死。 提交于 2019-12-06 10:00:31
问题 I tried turbine + hystrix dashboard with Spring boot 2 and latest versions of Spring cloud, seems exist some problem and turbine could not get stream from reactive service. I just uploaded simple microservices to github https://github.com/armdev/reactive-spring-cloud Exception like this: com.netflix.turbine.monitor.instance.InstanceMonitor$MisconfiguredHostException: [{"timestamp":"2018-03-08T17:22:05.809+0000","status":404,"error":"Not Found","message":"No message available","path":"/hystrix

Combining Netflix Zuul with Netflix Hystrix

被刻印的时光 ゝ 提交于 2019-12-06 06:44:51
问题 I'm a big fan of the Open Source project of Netflix. They made some really cool stuff. I have set up a Zuul and that is working fine. Created all kind of filters and those are dynamically loaded and run. What I now try to do is use Hystrix inside a filter. What I see is that if everything when fine it all works. But when there is a exception inside the run() method Zuul is catching it instead of Hystrix. So the getFallback() is never called. I shared my code Github. Somebody has any idea how

关于【缓存穿透,缓存击穿,缓存雪崩,热点数据丢失】问题的解决方案

不问归期 提交于 2019-12-06 04:05:16
本篇文章转载自: 石衫的架构笔记 微信公众号 前言 当我们系统中使用到了缓存时,不管是一级缓存还是多级缓存,它的作用就是业务系统在请求数据时,如果缓存中有,就从缓存中获取;如果缓存中没有,再去访问DB,从而减少DB的压力,缩短获取数据的时间。那么在使用缓存的过程中,会出现哪些常见问题?我们又如何来解决? 1 缓存穿透 1.1 什么是缓存穿透 正常情况下,我们去查询数据都是存在的。 那么请求查询一条压根在数据库中就不存在的数据,即在缓存和数据库中都没有这条数据,但是请求每次在缓存中找不到,就去访问数据库,比较占用和消耗数据库的资源,这种现象,就叫做缓存穿透。 1.2 穿透带来的问题 黑客攻击系统,通过缓存穿透,使用一个不存在的id,大量访问系统的接口,系统因为缓存中没有数据,而去大量的访问数据库,导致数据库资源被无效占用,影响甚至拖垮正常业务。 1.3 解决办法 1.3.1 缓存空值 我们知道,缓存服务器(redis)一般是通过key value来存储缓存数据的。当有请求过来,会通过key在缓存中查找数据。而发生缓存击穿的问题,是因为缓存服务器中没有存储这些无效数据的key,从而导致无效请求访问到数据库。 那么我们可以在这些请求访问数据库后,没有得到查询结果时,在缓存服务器中存储这个key,并设置它的值为null,这样当再次发生查询这个key的请求时,缓存服务器就直接返回null

Hystrix ignores timeout on run

£可爱£侵袭症+ 提交于 2019-12-06 00:33:01
I'm experimenting with Hystrix a little. I under stand the documentation such that even a synchronous call to a Hystrix command via 'run' runs by default in a thread and should be subject to the timeout configured in Hystrix. But when I try it, no timeout seems to happen. Do I misinterpret the documentation? Or am I doing something wrong? And is there a way to get the timeout behavior with synchronous calls? More specific: I have a 'SimpleService' that takes 5 seconds to return. This is wrapped in a Hystrix command with a timeout of 500ms: public class WebRequestCommand extends HystrixCommand

Spring Cloud Hystrix ThreadPool的bug

二次信任 提交于 2019-12-06 00:18:39
BUG背景 JDK: 11.0.4 Spring Cloud Finchley.SR3 相关配置: #开启hystrix feign.hystrix.enabled=true #关闭断路器 hystrix.command.default.circuitBreaker.enabled=false #禁用hystrix远程调用超时时间 hystrix.command.default.execution.timeout.enabled=false hystrix.threadpool.default.coreSize=50 Hystrix隔离策略: 线程隔离 在Feign调用的时候,会报错: Caused by: java.util.concurrent.ExecutionException: Observable onError at rx.internal.operators.BlockingOperatorToFuture$2.getValue(BlockingOperatorToFuture.java:118) ~[rxjava-1.3.8.jar!/:1.3.8] at rx.internal.operators.BlockingOperatorToFuture$2.get(BlockingOperatorToFuture.java:102) ~[rxjava-1.3.8

SpringCloud之Hystrix集群及集群监控turbine

﹥>﹥吖頭↗ 提交于 2019-12-05 16:01:38
目的:    Hystrix 集群及 监控 turbine    Feign 、 Hystrix 整合之 服务熔断服务降级彻底解耦    集群后 超时设置 Hystrix集群及监控turbine  新建一个springboot工程 microservice-student-provider-hystrix-1005把它作为集群 工程中测试详细代码见 https://www.cnblogs.com/huangting/p/11902121.html 导入pom依赖 <?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <parent> <groupId>com.ht</groupId> <artifactId>htSpringCloud</artifactId> <version>1.0