为啥在本机项目启动了，访问不了Whitelabel Error Page This application has no explicit mapping for /error, so you are seeing this as a fallback. Fri Jun 12 10:04:53 CST 2020 There was an unexpected error (type=Not Found, status=404). No message available about app-template HOT 4 CLOSED

完整的 url 是什么？怎么启动的

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您好：
我是在windows 下打war包，步骤如下：
1.cd web/app 目录下, 执行 npm run build 编译客户端
2.cd web/admin 目录下, 执行 npm run build:prod 编译客户端
3.在项目主目录下创建 build/www/admin/ 三层目录
4.将 web/app/dist/ 目录中的所有文件拷贝到 build/www 目录下
5.将 web/admin/dist/ 目录中的所有文件拷贝到 build/www/admin 目录下
6.在项目主目录下执行 gradle build -Pprod, 然后项目的 war 包会出现在 build/libs 目录下
通过Java -jar启动的。启动无报错
启动最后日志如下：
2020-06-24 10:22:11,892[INFO]org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor.initialize:181Initializing ExecutorService 'applicationTaskExecutor'
2020-06-24 10:22:12,987[INFO]springfox.documentation.spring.web.plugins.DocumentationPluginsBootstrapper.start:160Context refreshed
2020-06-24 10:22:13,049[INFO]springfox.documentation.spring.web.plugins.DocumentationPluginsBootstrapper.start:163Found 1 custom documentation plugin(s)
2020-06-24 10:22:13,136[INFO]springfox.documentation.spring.web.scanners.ApiListingReferenceScanner.scan:41Scanning for api listing references
2020-06-24 10:22:13,901[INFO]springfox.documentation.spring.web.readers.operation.CachingOperationNameGenerator.startingWith:40Generating unique operation named: uploadUsingPOST_1
2020-06-24 10:22:13,988[INFO]springfox.documentation.spring.web.readers.operation.CachingOperationNameGenerator.startingWith:40Generating unique operation named: downloadLogUsingGET_1
2020-06-24 10:22:14,197[INFO]springfox.documentation.spring.web.readers.operation.CachingOperationNameGenerator.startingWith:40Generating unique operation named: uploadUsingPOST_2
2020-06-24 10:22:14,276[INFO]springfox.documentation.spring.web.readers.operation.CachingOperationNameGenerator.startingWith:40Generating unique operation named: deleteUserUsingDELETE_1
2020-06-24 10:22:14,482[INFO]org.apache.coyote.http11.Http11NioProtocol.log:173Starting ProtocolHandler ["http-nio-8090"]
2020-06-24 10:22:14,583[INFO]org.springframework.boot.web.embedded.tomcat.TomcatWebServer.start:204Tomcat started on port(s): 8090 (http) with context path '/app-template'
2020-06-24 10:22:14,592[INFO]com.company.app.AppApplication.logStarted:61Started AppApplication in 21.88 seconds (JVM running for 22.789)
2020-06-24 10:24:19,392[INFO]org.apache.catalina.core.ContainerBase.[Tomcat].[localhost].[/app-template].log:173Initializing Spring DispatcherServlet 'dispatcherServlet'
2020-06-24 10:24:19,393[INFO]org.springframework.web.servlet.DispatcherServlet.initServletBean:525Initializing Servlet 'dispatcherServlet'
2020-06-24 10:24:19,415[INFO]org.springframework.web.servlet.DispatcherServlet.initServletBean:547Completed initialization in 21 ms

访问地址1：http://localhost:8090/app-template/index.html
报错：
Whitelabel Error Page
This application has no explicit mapping for /error, so you are seeing this as a fallback.
Wed Jun 24 10:31:17 CST 2020
There was an unexpected error (type=Not Found, status=404).
No message available

访问地址2：
http://localhost:8090/app-template/admin/index.html
报错：
该网页无法正常运作 如果问题仍然存在，请与网站所有者联系。
HTTP ERROR 40

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我这里目前是使用 ubuntu 来测试的，暂时没有遇到这个问题，prod，dev 模式都可以运行，看看会不会是 8090 端口被别的进程占用了，之后我有空找一个 windows 机器来试试

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使用 Windows 机器测试了下，dev，prod 模式编译之后都测试了下，都是可以，遇到 issue 描述的问题。所以怀疑可能和网络环境有关系

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