Hi,
I actually have an application coded in Vaadin 10 using Spring Boot and Maven. This application is exported as a war and deployed on a Tomcat 8.5. Everything works fine.
When I try to update the application to Vaadin 12 (using the pom.xml), everything is running fine in the embedded tomcat. But when I export the war and deploy it to the same Tomcat 8.5 I have the following error :
2019-01-29 00:38:18.729 ERROR 3620 --- [o-8009-exec-348]
o.s.b.w.servlet.support.ErrorPageFilter : Forwarding to error page from request
[/frontend/styles/shared-styles.html] due to exception [com.vaadin.flow.server.ServiceException: java.lang.IllegalArgumentException: Unable to create an instance of 'MyClass'. Make sure the class has a public no-arg constructor.]
javax.servlet.ServletException: com.vaadin.flow.server.ServiceException: java.lang.IllegalArgumentException: Unable to create an instance of 'MyClass'. Make sure the class has a public no-arg constructor.
at com.vaadin.flow.server.VaadinServlet.service(VaadinServlet.java:229) ~[flow-server-1.2.4.jar:1.2.4]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:742) ~[servlet-api.jar:na]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) [catalina.jar:8.5.35]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [catalina.jar:8.5.35]
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) ~[tomcat-websocket.jar:8.5.35]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [catalina.jar:8.5.35]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [catalina.jar:8.5.35]
at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:209) ~[spring-security-web-5.0.9.RELEASE.jar:5.0.9.RELEASE]
at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:178) ~[spring-security-web-5.0.9.RELEASE.jar:5.0.9.RELEASE]
at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:357) ~[spring-web-5.0.10.RELEASE.jar:5.0.10.RELEASE]
at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:270) ~[spring-web-5.0.10.RELEASE.jar:5.0.10.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [catalina.jar:8.5.35]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [catalina.jar:8.5.35]
at org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:109) ~[spring-web-5.0.10.RELEASE.jar:5.0.10.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-5.0.10.RELEASE.jar:5.0.10.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [catalina.jar:8.5.35]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [catalina.jar:8.5.35]
at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:93) ~[spring-web-5.0.10.RELEASE.jar:5.0.10.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-5.0.10.RELEASE.jar:5.0.10.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [catalina.jar:8.5.35]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [catalina.jar:8.5.35]
at org.springframework.boot.web.servlet.support.ErrorPageFilter.doFilter(ErrorPageFilter.java:130) [spring-boot-2.0.6.RELEASE.jar:2.0.6.RELEASE]
at org.springframework.boot.web.servlet.support.ErrorPageFilter.access$000(ErrorPageFilter.java:66) [spring-boot-2.0.6.RELEASE.jar:2.0.6.RELEASE]
at org.springframework.boot.web.servlet.support.ErrorPageFilter$1.doFilterInternal(ErrorPageFilter.java:105) [spring-boot-2.0.6.RELEASE.jar:2.0.6.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-5.0.10.RELEASE.jar:5.0.10.RELEASE]
at org.springframework.boot.web.servlet.support.ErrorPageFilter.doFilter(ErrorPageFilter.java:123) [spring-boot-2.0.6.RELEASE.jar:2.0.6.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [catalina.jar:8.5.35]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [catalina.jar:8.5.35]
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200) [spring-web-5.0.10.RELEASE.jar:5.0.10.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-5.0.10.RELEASE.jar:5.0.10.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [catalina.jar:8.5.35]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [catalina.jar:8.5.35]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198) [catalina.jar:8.5.35]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) [catalina.jar:8.5.35]
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:493) [catalina.jar:8.5.35]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140) [catalina.jar:8.5.35]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81) [catalina.jar:8.5.35]
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:650) [catalina.jar:8.5.35]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87) [catalina.jar:8.5.35]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342) [catalina.jar:8.5.35]
at org.apache.coyote.ajp.AjpProcessor.service(AjpProcessor.java:479) [tomcat-coyote.jar:8.5.35]
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) [tomcat-coyote.jar:8.5.35]
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:806) [tomcat-coyote.jar:8.5.35]
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1498) [tomcat-coyote.jar:8.5.35]
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-coyote.jar:8.5.35]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [na:1.8.0_191]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [na:1.8.0_191]
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-util.jar:8.5.35]
at java.lang.Thread.run(Thread.java:748) [na:1.8.0_191]
Caused by: com.vaadin.flow.server.ServiceException: java.lang.IllegalArgumentException: Unable to create an instance of 'MyClass'. Make sure the class has a public no-arg constructor.
at com.vaadin.flow.server.VaadinService.handleExceptionDuringRequest(VaadinService.java:1594) ~[flow-server-1.2.4.jar:1.2.4]
at com.vaadin.flow.server.VaadinService.handleRequest(VaadinService.java:1557) ~[flow-server-1.2.4.jar:1.2.4]
at com.vaadin.flow.server.VaadinServlet.service(VaadinServlet.java:227) ~[flow-server-1.2.4.jar:1.2.4]
... 48 common frames omitted
Caused by: java.lang.IllegalArgumentException: Unable to create an instance of 'MyClass'. Make sure the class has a public no-arg constructor.
at com.vaadin.flow.internal.ReflectTools.createProxyInstance(ReflectTools.java:515) ~[flow-server-1.2.4.jar:1.2.4]
at com.vaadin.flow.internal.ReflectTools.createInstance(ReflectTools.java:447) ~[flow-server-1.2.4.jar:1.2.4]
at com.vaadin.flow.di.DefaultInstantiator.getOrCreate(DefaultInstantiator.java:65) ~[flow-server-1.2.4.jar:1.2.4]
at com.vaadin.flow.di.Instantiator.createRouteTarget(Instantiator.java:158) ~[flow-server-1.2.4.jar:1.2.4]
at com.vaadin.flow.router.internal.AbstractNavigationStateRenderer.lambda$getRouteTarget$1(AbstractNavigationStateRenderer.java:116) ~[flow-server-1.2.4.jar:1.2.4]
at java.util.Optional.orElseGet(Optional.java:267) ~[na:1.8.0_191]
at com.vaadin.flow.router.internal.AbstractNavigationStateRenderer.getRouteTarget(AbstractNavigationStateRenderer.java:115) ~[flow-server-1.2.4.jar:1.2.4]
at com.vaadin.flow.router.internal.AbstractNavigationStateRenderer.handle(AbstractNavigationStateRenderer.java:167) ~[flow-server-1.2.4.jar:1.2.4]
at com.vaadin.flow.router.internal.AbstractNavigationStateRenderer.reroute(AbstractNavigationStateRenderer.java:345) ~[flow-server-1.2.4.jar:1.2.4]
at com.vaadin.flow.router.internal.AbstractNavigationStateRenderer.handle(AbstractNavigationStateRenderer.java:185) ~[flow-server-1.2.4.jar:1.2.4]
at com.vaadin.flow.router.internal.ErrorStateRenderer.handle(ErrorStateRenderer.java:49) ~[flow-server-1.2.4.jar:1.2.4]
at com.vaadin.flow.router.Router.handleExceptionNavigation(Router.java:259) ~[flow-server-1.2.4.jar:1.2.4]
at com.vaadin.flow.router.Router.navigate(Router.java:194) ~[flow-server-1.2.4.jar:1.2.4]
at com.vaadin.flow.router.Router.initializeUI(Router.java:95) ~[flow-server-1.2.4.jar:1.2.4]
at com.vaadin.flow.server.BootstrapHandler.createAndInitUI(BootstrapHandler.java:1117) ~[flow-server-1.2.4.jar:1.2.4]
at com.vaadin.flow.server.BootstrapHandler.synchronizedHandleRequest(BootstrapHandler.java:396) ~[flow-server-1.2.4.jar:1.2.4]
at com.vaadin.flow.server.SynchronizedRequestHandler.handleRequest(SynchronizedRequestHandler.java:40) ~[flow-server-1.2.4.jar:1.2.4]
at com.vaadin.flow.server.VaadinService.handleRequest(VaadinService.java:1545) ~[flow-server-1.2.4.jar:1.2.4]
So, that’s true : MyClass (not the real name) has no public no-arg constructor, but it works well in the embedded Tomcat and also works using Vaadin 10.
So I don’t understand, is there anything else to do to use Vaadin 12 war in external Tomcat 8.5 ?
Thanks for your help.
Greg.