Spring cloud Hystrix 、Dashboard、API(zuul)相关报错
- POM导入依赖失败，spring-cloud-starter-netflix-hystrix一直报红，maven的包带红色波浪线，的解决方法
POM导入依赖失败，spring-cloud-starter-netflix-hystrix一直报红，maven的包带红色波浪线，的解决方法
2.Hystrix Stream的监控页面不显示内容：
打开Hystrix Stream页面，进入后，发现只有一行Unable to connect to Command Metric Stream.
因为springboot的默认路径不是 “/hystrix.stream”，在启动类中加入如下代码
@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; }
重启项目，并重新打开监控页面，访问一下即可就可以了
3.Spring cloud中整合Hystrix时，无法识别@HystrixCommand标签，项目的Hystrix依赖为：
<groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-netflix-hystrix</artifactId>
查了一下，@HystrixCommand注解是由名为javanica的Hystrix contrib库提供的。javanica是一个Hystrix的子项目，用于简化Hystrix的使用。所以，还需要添加一个依赖：
<dependency> <groupId>com.netflix.hystrix</groupId> <artifactId>hystrix-javanica</artifactId> <version>RELEASE</version> </dependency>
4.Hystrix弃用过时的@EnableCircuitBreaker注解问题
5.zuul网关报错：
2022-05-03 09:55:49.162 ERROR 18504 --- [nio-8050-exec-1] o.a.c.c.C.[Tomcat].[localhost] : Exception Processing ErrorPage[errorCode=0, location=/error] org.springframework.web.util.NestedServletException: Handler dispatch failed; nested exception is java.lang.NoSuchMethodError: org.springframework.boot.web.servlet.error.ErrorController.getErrorPath()Ljava/lang/String; at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1082) ~[spring-webmvc-5.3.16.jar:5.3.16] at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:963) ~[spring-webmvc-5.3.16.jar:5.3.16] at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) ~[spring-webmvc-5.3.16.jar:5.3.16] at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898) ~[spring-webmvc-5.3.16.jar:5.3.16] at javax.servlet.http.HttpServlet.service(HttpServlet.java:655) ~[tomcat-embed-core-9.0.58.jar:4.0.FR] at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) ~[spring-webmvc-5.3.16.jar:5.3.16] at javax.servlet.http.HttpServlet.service(HttpServlet.java:764) ~[tomcat-embed-core-9.0.58.jar:4.0.FR] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:227) ~[tomcat-embed-core-9.0.58.jar:9.0.58] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.58.jar:9.0.58] at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100) ~[spring-web-5.3.16.jar:5.3.16] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117) ~[spring-web-5.3.16.jar:5.3.16] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.58.jar:9.0.58] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.58.jar:9.0.58] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:102) ~[spring-web-5.3.16.jar:5.3.16] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.58.jar:9.0.58] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.58.jar:9.0.58] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:102) ~[spring-web-5.3.16.jar:5.3.16] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.58.jar:9.0.58] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.58.jar:9.0.58] at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:711) ~[tomcat-embed-core-9.0.58.jar:9.0.58] at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:461) ~[tomcat-embed-core-9.0.58.jar:9.0.58] at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:385) ~[tomcat-embed-core-9.0.58.jar:9.0.58] at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:313) ~[tomcat-embed-core-9.0.58.jar:9.0.58] at org.apache.catalina.core.StandardHostValve.custom(StandardHostValve.java:403) [tomcat-embed-core-9.0.58.jar:9.0.58] at org.apache.catalina.core.StandardHostValve.status(StandardHostValve.java:249) [tomcat-embed-core-9.0.58.jar:9.0.58] at org.apache.catalina.core.StandardHostValve.throwable(StandardHostValve.java:344) [tomcat-embed-core-9.0.58.jar:9.0.58] at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:169) [tomcat-embed-core-9.0.58.jar:9.0.58] at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) [tomcat-embed-core-9.0.58.jar:9.0.58] at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78) [tomcat-embed-core-9.0.58.jar:9.0.58] at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:359) [tomcat-embed-core-9.0.58.jar:9.0.58] at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:399) [tomcat-embed-core-9.0.58.jar:9.0.58] at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) [tomcat-embed-core-9.0.58.jar:9.0.58] at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:889) [tomcat-embed-core-9.0.58.jar:9.0.58] at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1735) [tomcat-embed-core-9.0.58.jar:9.0.58] at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-9.0.58.jar:9.0.58] at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191) [tomcat-embed-core-9.0.58.jar:9.0.58] at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659) [tomcat-embed-core-9.0.58.jar:9.0.58] at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-9.0.58.jar:9.0.58] at java.lang.Thread.run(Thread.java:748) [na:1.8.0_191] Caused by: java.lang.NoSuchMethodError: org.springframework.boot.web.servlet.error.ErrorController.getErrorPath()Ljava/lang/String; at org.springframework.cloud.netflix.zuul.web.ZuulHandlerMapping.lookupHandler(ZuulHandlerMapping.java:87) ~[spring-cloud-netflix-zuul-2.2.7.RELEASE.jar:2.2.7.RELEASE] at org.springframework.web.servlet.handler.AbstractUrlHandlerMapping.getHandlerInternal(AbstractUrlHandlerMapping.java:151) ~[spring-webmvc-5.3.16.jar:5.3.16] at org.springframework.web.servlet.handler.AbstractHandlerMapping.getHandler(AbstractHandlerMapping.java:498) ~[spring-webmvc-5.3.16.jar:5.3.16] at org.springframework.web.servlet.DispatcherServlet.getHandler(DispatcherServlet.java:1261) ~[spring-webmvc-5.3.16.jar:5.3.16] at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1043) ~[spring-webmvc-5.3.16.jar:5.3.16] ... 38 common frames omitted
根本原因是高版本的cloud版本不支持zuul了
换用低版本
