Listener Error

Vaadin 6 / 7 / 8
1

Hi everybody,

I´m trying to understand Vaadin to work it, I want to create a navigator project and I think that I near but appear a error in my execution that I can solve:

jun 11, 2018 1:18:11 PM org.apache.catalina.core.ApplicationContext log
GRAVE: StandardWrapper.Throwable
java.lang.NoSuchMethodError: com.vaadin.server.VaadinServletService.addSessionInitListener(Lcom/vaadin/server/SessionInitListener;)V

I use Vaadin 8, in eclipse with the plugin and tomcat server.

The project have not errors or problems but when I try to run always throw this error.

This is my web.xml:

<?xml version="1.0" encoding="UTF-8"?>
<web-app id="WebApp_ID" version="3.0"
	xmlns="http://java.sun.com/xml/ns/javaee"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">

	<display-name>Vaadin Web Application</display-name>

	<context-param>
		<description>Vaadin production mode</description>
		<param-name>productionMode</param-name>
		<param-value>false</param-value>
	</context-param>

	<context-param>
		<param-name>contextConfigLocation</param-name>
		<param-value>/WEB-INF/spring/context.xml</param-value>
	</context-param>

	<listener>
		<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
	</listener>

	<listener>
		<listener-class>org.springframework.web.context.request.RequestContextListener</listener-class>
	</listener>

	<servlet>
		<servlet-name>Vaadin Application Servlet</servlet-name>
		<servlet-class>ru.xpoft.vaadin.SpringVaadinServlet</servlet-class>

		<init-param>
	        <param-name>beanName</param-name>
	        <param-value>MyVaadinUI</param-value>
		</init-param>

	</servlet>

	<servlet-mapping>
		<servlet-name>Vaadin Application Servlet</servlet-name>
		<url-pattern>/*</url-pattern>
	</servlet-mapping>

</web-app>

Thanks for the help and sorry for my English but is not my native language

2

ru.xpoft.vaadin.SpringVaadinServlet is for Vaadin 7 and not 8 I think

3

oooh thanks a lot for the help, I change it for

<servlet>
	
	<servlet-name>Vaadin Application Servlet</servlet-name>
	<servlet-class>com.vaadin.server.VaadinServlet</servlet-class>

	<init-param>
		<description>Vaadin UI to display</description>
		<param-name>UI</param-name>
		<param-value>com.example.AprendiendoVaadin4UI.AprendiendoVaadin4UI</param-value>
	</init-param> 

</servlet>

But I get another error hahaha:

Vaadin is running in DEBUG MODE.
Add productionMode=true to web.xml to disable debug features.
To show debug window, add ?debug to your application URL.
=================================================================
jun 11, 2018 1:57:22 PM com.vaadin.server.DefaultErrorHandler doDefault
GRAVE: 
java.lang.NullPointerException
	at ru.xpoft.vaadin.DiscoveryNavigator.initViews(DiscoveryNavigator.java:92)
	at ru.xpoft.vaadin.DiscoveryNavigator.<init>(DiscoveryNavigator.java:70)
	at com.example.AprendiendoVaadin4UI.AprendiendoVaadin4UI.init(AprendiendoVaadin4UI.java:26)
	at com.vaadin.ui.UI.doInit(UI.java:771)
	at com.vaadin.server.communication.UIInitHandler.getBrowserDetailsUI(UIInitHandler.java:218)
	at com.vaadin.server.communication.UIInitHandler.synchronizedHandleRequest(UIInitHandler.java:76)
	at com.vaadin.server.SynchronizedRequestHandler.handleRequest(SynchronizedRequestHandler.java:40)
	at com.vaadin.server.VaadinService.handleRequest(VaadinService.java:1601)
	at com.vaadin.server.VaadinServlet.service(VaadinServlet.java:445)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:496)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81)
	at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:650)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342)
	at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:803)
	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:790)
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1468)
	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.lang.Thread.run(Thread.java:745)

PD: Thanks for the help.