Could not found VaadinServlet

Vaadin 6 / 7 / 8
1

While upgrading to Vaadin7 I get this exception when i want to use vaadin in a webapplication:

java.lang.ClassNotFoundException: com.vaadin.server.VaadinServlet
	at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1711)
	at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1556)
	at org.apache.catalina.core.DefaultInstanceManager.loadClass(DefaultInstanceManager.java:532)
	at org.apache.catalina.core.DefaultInstanceManager.loadClassMaybePrivileged(DefaultInstanceManager.java:514)
	at org.apache.catalina.core.DefaultInstanceManager.newInstance(DefaultInstanceManager.java:133)
	at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1136)
	at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:857)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:136)
	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:168)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
	at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:927)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
	at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1001)
	at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:585)
	at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)
	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
	at java.lang.Thread.run(Thread.java:662)

This is my web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app 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"
    version="3.0">

    <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>shiroConfigLocations</param-name>
        <param-value>classpath:shiro.ini</param-value>
    </context-param>

    <servlet>
        <servlet-name>myservlet</servlet-name>
        <servlet-class>com.vaadin.server.VaadinServlet</servlet-class>
        <init-param>
            <description>Vaadin application class to start</description>
            <param-name>UI</param-name>
            <param-value>de.myservlet.base.sys.webapp.DemoApplication</param-value>
        </init-param>
        <init-param>
            <param-name>widgetset</param-name>
            <param-value>cde.myservlet.base.sys.webapp.widgetset.BaseWidgetset</param-value>
        </init-param>
    </servlet>

    <servlet-mapping>
        <servlet-name>myservlet</servlet-name>
        <url-pattern>/*</url-pattern>
    </servlet-mapping>
</web-app>

vaadin-server.jar can be found in WEB-INF/lib.

Do you have any ideas? Thanks in advance!

2

Hi. Check that Tomcat deployed everything correctly. I get sometimes only partial deployments when developing on localhost with Eclipse and Tomcat 7.