Hi,
we have switch our projects to maven. At this time all will compiling fine and the ear file will be generated successfully. 
But if we start our application on wildfly we get some exceptions like:
Caused by: javax.servlet.ServletException: java.lang.NoClassDefFoundError: org/eclipse/jetty/websocket/server/WebSocketServerFactory
at org.atmosphere.cpr.AtmosphereFramework.init(AtmosphereFramework.java:912)
at org.atmosphere.cpr.AtmosphereFramework.init(AtmosphereFramework.java:780)
at com.vaadin.server.communication.PushRequestHandler.initAtmosphere(PushRequestHandler.java:219)
This means that the Atmosphere Framework detected the wrong WebServer on which it is running (right? See also on https://github.com/Atmosphere/atmosphere/wiki/ClassNotFoundException-at-startup )
If I look into the war file I can also see several jetty.jar files. The question is: how to remove the jetty stuff.
Our pom of the war project is currently:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<parent>
<artifactId>DFl_MvnParent</artifactId>
<groupId>com.coco_on.docFlow</groupId>
<version>2.3.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>DFl_Vaadin</artifactId>
<packaging>war</packaging>
<prerequisites>
<maven>3</maven>
</prerequisites>
<scm>
<connection>scm:svn:https://maven:svN.89mA+veN@192.168.1.2/repos/c-onDocFlow/trunk/c-onDocFlowVaadin/</connection>
<developerConnection>scm:svn:https://maven:svN.89mA+veN@192.168.1.2/repos/c-onDocFlow/trunk/c-onDocFlowVaadin/</developerConnection>
<tag>HEAD</tag>
<url>https://maven:svN.89mA+veN@192.168.1.2/repos/c-onDocFlow/trunk/c-onDocFlowVaadin/</url>
</scm>
<properties>
<vaadin.version>7.7.3</vaadin.version>
<vaadin.plugin.version>7.7.3</vaadin.plugin.version>
<!-- jetty.plugin.version>9.3.9.v20160517</jetty.plugin.version -->
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
<!-- If there are no local customisations, this can also be "fetch" or "cdn" -->
<vaadin.widgetset.mode>local</vaadin.widgetset.mode>
</properties>
<repositories>
<repository>
<id>vaadin-addons</id>
<url>http://maven.vaadin.com/vaadin-addons</url>
</repository>
</repositories>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>com.vaadin</groupId>
<artifactId>vaadin-bom</artifactId>
<version>${vaadin.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<dependencies>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.0.1</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>com.vaadin</groupId>
<artifactId>vaadin-server</artifactId>
</dependency>
<dependency>
<groupId>com.vaadin</groupId>
<artifactId>vaadin-push</artifactId>
</dependency>
<dependency>
<groupId>com.vaadin</groupId>
<artifactId>vaadin-client-compiled</artifactId>
</dependency>
<dependency>
<groupId>com.vaadin</groupId>
<artifactId>vaadin-themes</artifactId>
</dependency>
<dependency>
<groupId>com.vaadin.external.gwt</groupId>
<artifactId>gwt-codeserver</artifactId>
<version>2.7.0.vaadin4</version>
</dependency>
<dependency>
<groupId>com.vaadin.external.gwt</groupId>
<artifactId>gwt-dev</artifactId>
<version>2.7.0.vaadin4</version>
</dependency>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.17</version>
</dependency>
<!-- dependency>
<groupId>com.vaadin</groupId>
<artifactId>vaadin-testbench</artifactId>
<version>4.1.0</version>
</dependency -->
<dependency>
<groupId>com.coco_on.tools</groupId>
<artifactId>CSVReporter</artifactId>
<version>0.0.1-SNAPSHOT</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war-plugin</artifactId>
<version>2.6</version>
<configuration>
<failOnMissingWebXml>false</failOnMissingWebXml>
<!-- Exclude an unnecessary file generated by the GWT compiler. -->
<packagingExcludes>WEB-INF/classes/VAADIN/widgetsets/WEB-INF/**</packagingExcludes>
<archive>
<manifest>
<addDefaultImplementationEntries>true</addDefaultImplementationEntries>
<addDefaultSpecificationEntries>true</addDefaultSpecificationEntries>
</manifest>
<manifestEntries>
<SCM-Revision>${buildNumber}</SCM-Revision>
</manifestEntries>
</archive>
</configuration>
</plugin>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>buildnumber-maven-plugin</artifactId>
<version>1.4</version>
<executions>
<execution>
<phase>validate</phase>
<goals>
<goal>create</goal>
</goals>
</execution>
</executions>
<configuration>
<doCheck>true</doCheck>
<doUpdate>true</doUpdate>
</configuration>
</plugin>
<plugin>
<groupId>com.vaadin</groupId>
<artifactId>vaadin-maven-plugin</artifactId>
<version>${vaadin.plugin.version}</version>
<executions>
<execution>
<goals>
<goal>update-theme</goal>
<goal>update-widgetset</goal>
<goal>compile</goal>
<!-- Comment out compile-theme goal to use on-the-fly theme compilation -->
<!-- goal>compile-theme</goal -->
</goals>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-clean-plugin</artifactId>
<version>3.0.0</version>
<!-- Clean up also any pre-compiled themes -->
<configuration>
<filesets>
<fileset>
<directory>src/main/webapp/VAADIN/themes</directory>
<includes>
<include>**/styles.css</include>
<include>**/styles.scss.cache</include>
</includes>
</fileset>
</filesets>
</configuration>
</plugin>
<!-- The Jetty plugin allows us to easily test the development build by
running jetty:run on the command line. -->
<!-- plugin>
<groupId>org.eclipse.jetty</groupId>
<artifactId>jetty-maven-plugin</artifactId>
<version>${jetty.plugin.version}</version>
<configuration>
<scanIntervalSeconds>2</scanIntervalSeconds>
</configuration>
</plugin -->
</plugins>
</build>
<profiles>
<profile>
<!-- Vaadin pre-release repositories -->
<id>vaadin-prerelease</id>
<activation>
<activeByDefault>false</activeByDefault>
</activation>
<repositories>
<repository>
<id>vaadin-prereleases</id>
<url>http://maven.vaadin.com/vaadin-prereleases</url>
</repository>
<repository>
<id>vaadin-snapshots</id>
<url>https://oss.sonatype.org/content/repositories/vaadin-snapshots/</url>
<releases>
<enabled>false</enabled>
</releases>
<snapshots>
<enabled>true</enabled>
</snapshots>
</repository>
</repositories>
<pluginRepositories>
<pluginRepository>
<id>vaadin-prereleases</id>
<url>http://maven.vaadin.com/vaadin-prereleases</url>
</pluginRepository>
<pluginRepository>
<id>vaadin-snapshots</id>
<url>https://oss.sonatype.org/content/repositories/vaadin-snapshots/</url>
<releases>
<enabled>false</enabled>
</releases>
<snapshots>
<enabled>true</enabled>
</snapshots>
</pluginRepository>
</pluginRepositories>
</profile>
</profiles>
</project>
Thanks,
Steffen