在 tomcat 中部署 vaadin 應用程式期間，出現例外：
06-Mar-2022 17:54:53.990 GRAVE [main] org.apache.catalina.startup.HostConfig.deployWAR Error durante el despliegue del archivo [/u01/tomcat/apache-t$
java.lang.IllegalStateException: Error starting child
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:720)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:690)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:705)
at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:978)
at org.apache.catalina.startup.HostConfig$DeployWar.run(HostConfig.java:1849)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at org.apache.tomcat.util.threads.InlineExecutorService.execute(InlineExecutorService.java:75)
at java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:112)
at org.apache.catalina.startup.HostConfig.deployWARs(HostConfig.java:773)
at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:427)
at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1576)
at org.apache.catalina.util.LifecycleBase.setState(LifecycleBase.java:366)
at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:936)
at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:841)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1384)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1374)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at org.apache.tomcat.util.threads.InlineExecutorService.execute(InlineExecutorService.java:75)
at java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:134)
at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:909)
at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:262)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
at org.apache.catalina.core.StandardService.startInternal(StandardService.java:421)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:930)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
at org.apache.catalina.startup.Catalina.start(Catalina.java:633)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:343)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:474)
Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardConte$
at org.apache.catalina.util.LifecycleBase.handleSubClassException(LifecycleBase.java:440)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:198)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:717)
... 37 more
Caused by: com.vaadin.flow.server.InvalidApplicationConfigurationException:
Unable to find a single class implementing `AppShellConfigurator` from the following candidates:
Unable to find a single class implementing `AppShellConfigurator` from the following candidates:
com.example.application.Application
com.example.application.views.MainLayout$AppShell
at com.vaadin.flow.server.AppShellRegistry.setShell(AppShellRegistry.java:140)
at com.vaadin.flow.server.startup.VaadinAppShellInitializer.lambda$init$1(VaadinAppShellInitializer.java:134)
at java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:184)
at java.util.stream.SortedOps$SizedRefSortingSink.end(SortedOps.java:352)
at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:483)
at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:472)
at java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:151)
at java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:174)
at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
at java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:418)
at com.vaadin.flow.server.startup.VaadinAppShellInitializer.init(VaadinAppShellInitializer.java:132)
at com.vaadin.flow.server.startup.VaadinAppShellInitializer.initialize(VaadinAppShellInitializer.java:79)
at com.vaadin.flow.server.startup.VaadinServletContextStartupInitializer.process(VaadinServletContextStartupInitializer.java:42)
at com.vaadin.flow.server.startup.ClassLoaderAwareServletContainerInitializer.lambda$onStartup$2(ClassLoaderAwareServletCo ....
作業系統：Linux 服務器：9.0.30.0 Vaadin：V 22.0.2
使用 vaadin 14 版時，我沒有這個問題。
uj5u.com熱心網友回復：
如檔案中所述，
整個 Vaadin 應用程式必須有一個單獨的應用程式 shell，這樣才能實作 AppShellConfigurator 的類不超過一個。
您的應用程式有兩個實作AppShellConfigurator.
確保您的應用程式只有一個實作 的類AppShellConfigurator，并將注釋移至它：@Viewport、@PageTitle、@BodySize、@Meta、@Inline、@PWA和@Push。
轉載請註明出處，本文鏈接：https://www.uj5u.com/qukuanlian/440037.html
上一篇：在SpringBatch中，與ItemReader呼叫鏈接我想呼叫靜態util方法來填充字串
下一篇：Java設計模式（編排/作業流）