I created a Vaadin project with Maven archetype (using Netbeans).
Than I tried switching Servlet API from 2.4 to 3.0 with changes in attached web.xml
Now I get following stacktrace on project startup:
SEVERE: Servlet.service() for servlet [MyVaadinUI]
in context with path
[/BrazzoVaadin] threw exception
[com.vaadin.server.ServiceException: com.vaadin.server.ServiceException:
No UIProvider has been added and there is no "UI" init parameter.] with root cause
com.vaadin.server.ServiceException: No UIProvider has been added and there is no "UI" init parameter.
at com.vaadin.server.ServletPortletHelper.checkUiProviders(ServletPortletHelper.java:179)
at com.vaadin.server.VaadinService.onVaadinSessionStarted(VaadinService.java:740)
at com.vaadin.server.VaadinService.createAndRegisterSession(VaadinService.java:699)
at com.vaadin.server.VaadinService.doFindOrCreateVaadinSession(VaadinService.java:655)
at com.vaadin.server.VaadinService.findOrCreateVaadinSession(VaadinService.java:596)
at com.vaadin.server.VaadinService.findVaadinSession(VaadinService.java:479)
at com.vaadin.server.VaadinService.handleRequest(VaadinService.java:1323)
at com.vaadin.server.VaadinServlet.service(VaadinServlet.java:236)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1023)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:724)
I already tried adding ‘UI’ or ‘UIProvider’ init-param in web.xml providing my UI class (which extends com.vaadin.ui.UI) but then I get error that my class doesn’t extend UIProvider.
How can I fix my setup ?
TIA