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spring-cloud-netflix-example's Issues

On app startup, ZUUL getting crash

On application startup, its get crash due to ZUUL error.

Here is the error detail:

2020-09-04 04:11:11.392  WARN [zuul,da57d6d53fe19227,da57d6d53fe19227,true] 1 --- [nio-8060-exec-1] o.s.c.n.z.filters.post.SendErrorFilter   : Error during filtering
zuul_1               | 
zuul_1               | com.netflix.zuul.exception.ZuulException: Forwarding error
zuul_1               | 	at org.springframework.cloud.netflix.zuul.filters.route.RibbonRoutingFilter.handleException(RibbonRoutingFilter.java:189) ~[spring-cloud-netflix-zuul-2.0.0.RELEASE.jar!/:2.0.0.RELEASE]
zuul_1               | 	at org.springframework.cloud.netflix.zuul.filters.route.RibbonRoutingFilter.forward(RibbonRoutingFilter.java:164) ~[spring-cloud-netflix-zuul-2.0.0.RELEASE.jar!/:2.0.0.RELEASE]
zuul_1               | 	at org.springframework.cloud.netflix.zuul.filters.route.RibbonRoutingFilter.run(RibbonRoutingFilter.java:112) ~[spring-cloud-netflix-zuul-2.0.0.RELEASE.jar!/:2.0.0.RELEASE]
zuul_1               | 	at com.netflix.zuul.ZuulFilter.runFilter(ZuulFilter.java:117) ~[zuul-core-1.3.1.jar!/:1.3.1]
zuul_1               | 	at com.netflix.zuul.FilterProcessor.processZuulFilter(FilterProcessor.java:193) ~[zuul-core-1.3.1.jar!/:1.3.1]
zuul_1               | 	at com.netflix.zuul.FilterProcessor.runFilters(FilterProcessor.java:157) ~[zuul-core-1.3.1.jar!/:1.3.1]
zuul_1               | 	at com.netflix.zuul.FilterProcessor.route(FilterProcessor.java:118) ~[zuul-core-1.3.1.jar!/:1.3.1]
zuul_1               | 	at com.netflix.zuul.ZuulRunner.route(ZuulRunner.java:96) ~[zuul-core-1.3.1.jar!/:1.3.1]
zuul_1               | 	at com.netflix.zuul.http.ZuulServlet.route(ZuulServlet.java:116) ~[zuul-core-1.3.1.jar!/:1.3.1]
zuul_1               | 	at com.netflix.zuul.http.ZuulServlet.service(ZuulServlet.java:81) ~[zuul-core-1.3.1.jar!/:1.3.1]
zuul_1               | 	at org.springframework.web.servlet.mvc.ServletWrappingController.handleRequestInternal(ServletWrappingController.java:165) [spring-webmvc-5.0.6.RELEASE.jar!/:5.0.6.RELEASE]
zuul_1               | 	at org.springframework.cloud.netflix.zuul.web.ZuulController.handleRequest(ZuulController.java:44) [spring-cloud-netflix-zuul-2.0.0.RELEASE.jar!/:2.0.0.RELEASE]
zuul_1               | 	at org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:52) [spring-webmvc-5.0.6.RELEASE.jar!/:5.0.6.RELEASE]
zuul_1               | 	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:991) [spring-webmvc-5.0.6.RELEASE.jar!/:5.0.6.RELEASE]
zuul_1               | 	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:925) [spring-webmvc-5.0.6.RELEASE.jar!/:5.0.6.RELEASE]
zuul_1               | 	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:974) [spring-webmvc-5.0.6.RELEASE.jar!/:5.0.6.RELEASE]
zuul_1               | 	at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:866) [spring-webmvc-5.0.6.RELEASE.jar!/:5.0.6.RELEASE]
zuul_1               | 	at javax.servlet.http.HttpServlet.service(HttpServlet.java:635) [tomcat-embed-core-8.5.31.jar!/:8.5.31]
zuul_1               | 	at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:851) [spring-webmvc-5.0.6.RELEASE.jar!/:5.0.6.RELEASE]
zuul_1               | 	at javax.servlet.http.HttpServlet.service(HttpServlet.java:742) [tomcat-embed-core-8.5.31.jar!/:8.5.31]
zuul_1               | 	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) [tomcat-embed-core-8.5.31.jar!/:8.5.31]
zuul_1               | 	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-8.5.31.jar!/:8.5.31]
zuul_1               | 	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) [tomcat-embed-websocket-8.5.31.jar!/:8.5.31]
zuul_1               | 	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-8.5.31.jar!/:8.5.31]
zuul_1               | 	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-8.5.31.jar!/:8.5.31]
zuul_1               | 	at org.springframework.boot.actuate.metrics.web.servlet.WebMvcMetricsFilter.filterAndRecordMetrics(WebMvcMetricsFilter.java:158) [spring-boot-actuator-2.0.2.RELEASE.jar!/:2.0.2.RELEASE]
zuul_1               | 	at org.springframework.boot.actuate.metrics.web.servlet.WebMvcMetricsFilter.filterAndRecordMetrics(WebMvcMetricsFilter.java:126) [spring-boot-actuator-2.0.2.RELEASE.jar!/:2.0.2.RELEASE]
zuul_1               | 	at org.springframework.boot.actuate.metrics.web.servlet.WebMvcMetricsFilter.doFilterInternal(WebMvcMetricsFilter.java:111) [spring-boot-actuator-2.0.2.RELEASE.jar!/:2.0.2.RELEASE]'

java:8-jdk is unavailable

./buildDockerImage.sh
[+] Building 0.9s (3/3) FINISHED
=> [internal] load build definition from Dockerfile 0.0s
=> => transferring dockerfile: 37B 0.0s
=> [internal] load .dockerignore 0.0s
=> => transferring context: 2B 0.0s
=> ERROR [internal] load metadata for docker.io/library/java:8-jdk 0.9s

[internal] load metadata for docker.io/library/java:8-jdk:

failed to solve with frontend dockerfile.v0: failed to create LLB definition: docker.io/library/java:8-jdk: not found

feature

1- to be more resilient i suggest using Apache Kafka as a service-to-service communication and also replace the queue to Zipkin
2- add Event Sourcing

如何理解“Be of the web, not behind the web”

在老外眼里，所有的微服务都是基于rest api。俗话说：

Be of the web, not behind the web

-- Ian Robinson

请问，你如何对比rest api和dubbo中soa接口的优劣。

先抛点砖：
1，部署方面，rest api和db可放入同一进程，避免dubbo的3个进程：1，soa一个进程；2，admin一个；3，http 一个。
2，微服务划分自然，soa是中间抽象。增加了复杂度和调用链条。
3，rest api跨平台和语言；soa基本用java，而且要提供api.jar，版本管理即使用maven私服也容易出问题。
4，rest api较慢，但计算机硬件的发展会掩盖这一点。

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