org.jboss.as.server.deployment.DeploymentUnitProce

I create simple app with PrimeFaces 3.4 and JSF 2.1. When I deploy the application in my JBoss AS 7.0, I encounter the following error

18:55:27,684 INFO  [org.jboss.as.server.deployment] (MSC service thread 1-1) Starting deployment of "Getting-started-with-Primefaces.war"
18:55:29,480 ERROR [org.jboss.msc.service.fail] (MSC service thread 1-2) MSC00001: Failed to start service jboss.deployment.unit."Getting-started-with-Primefaces.war".PARSE: org.jboss.msc.service.StartException in service jboss.deployment.unit."Getting-started-with-Primefaces.war".PARSE: Failed to process phase PARSE of deployment "Getting-started-with-Primefaces.war"
    at org.jboss.as.server.deployment.DeploymentUnitPhaseService.start(DeploymentUnitPhaseService.java:121) [jboss-as-server-7.0.2.Final.jar:7.0.2.Final]
    at org.jboss.msc.service.ServiceControllerImpl$StartTask.startService(ServiceControllerImpl.java:1824) [jboss-msc-1.0.1.GA.jar:1.0.1.GA]
    at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1759) [jboss-msc-1.0.1.GA.jar:1.0.1.GA]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) [:1.7.0_79]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [:1.7.0_79]
    at java.lang.Thread.run(Thread.java:745) [:1.7.0_79]
Caused by: org.jboss.as.server.deployment.DeploymentUnitProcessingException: Failed to parse "/C:/Users/marcos/Downloads/jboss-as-web-7.0.2.Final/jboss-as-web-7.0.2.Final/standalone/deployments/Getting-started-with-Primefaces.war/WEB-INF/web.xml" at [6,1]
    at org.jboss.as.web.deployment.WebParsingDeploymentProcessor.deploy(WebParsingDeploymentProcessor.java:70)
    at org.jboss.as.server.deployment.DeploymentUnitPhaseService.start(DeploymentUnitPhaseService.java:115) [jboss-as-server-7.0.2.Final.jar:7.0.2.Final]
    ... 5 more

My pom.xml

<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/maven-v4_0_0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.itcuties.examples.webapps.simplejsf</groupId>
  <artifactId>simple-jsf2-with-primefaces</artifactId>
  <packaging>war</packaging>
  <version>0.0.1-SNAPSHOT</version>
  <name>simple-jsf2</name>
  <url>http://maven.apache.org</url>



  <dependencies>
    <!-- Primefaces -->  
    <dependency>
        <groupId>org.primefaces</groupId>
        <artifactId>primefaces</artifactId>
        <version>3.4</version>
    </dependency>
    <!-- JSF 2 API -->
    <dependency>
        <groupId>com.sun.faces</groupId>
        <artifactId>jsf-api</artifactId>
        <version>2.2.0-m07</version>
    </dependency>
  </dependencies>
  <repositories>
      <repository>
          <id>primefaces-repository</id>
          <name>Primefaces repository</name>
          <url>http://repository.primefaces.org</url>
      </repository>
  </repositories>
  <build>
    <finalName>jsf2</finalName>
    <plugins>
        <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-compiler-plugin</artifactId>
        <version>3.1</version>
        <configuration>
            <source>1.7</source>
            <target>1.7</target>
        </configuration>
    </plugin>
    </plugins>

  </build>
</project>

Update: on request, my web.xml:

<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">
<web-app>
    <display-name>Simple JSF2 Application with Primefaces</display-name>

    <!-- 
        Current project stage. When it is set to 'Development' Primefaces give a lot of debug information on the screen.
     -->
    <context-param>
        <param-name>javax.faces.PROJECT_STAGE</param-name>
        <param-value>Development</param-value>
    </context-param>

    <welcome-file-list>
        <welcome-file>index.xhtml</welcome-file>
    </welcome-file-list>

    <!-- Staring JSF -->
    <servlet>
        <servlet-name>Faces Servlet</servlet-name>
        <servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
        <load-on-startup>1</load-on-startup>
    </servlet>

    <!-- JSF URL mapping -->
    <servlet-mapping>
        <servlet-name>Faces Servlet</servlet-name>
        <url-pattern>*.xhtml</url-pattern>
    </servlet-mapping>

</web-app>

The problem in cause by, is in line [6,1] in the tag "web-app", but I do not understand.

Any idea what could be the problem?

In case you're getting exceptions, always head to the bottommost "Caused by" part for the root cause of all the trouble.

Caused by: org.jboss.as.server.deployment.DeploymentUnitProcessingException: Failed to parse "/C:/Users/marcos/Downloads/jboss-as-web-7.0.2.Final/jboss-as-web-7.0.2.Final/standalone/deployments/Getting-started-with-Primefaces.war/WEB-INF/web.xml" at [6,1]

You see, a good exception and message is usually already the whole answer at its own. The server choked while parsing the webapp's web.xml file at line 6 and character 1.

Your web.xml look like this:

1    <web-app xmlns="http://java.sun.com/xml/ns/javaee"
2        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
3        xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
4                            http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
5                            version="3.0">
6    <web-app>
7        <display-name>Simple JSF2 Application with Primefaces</display-name>
.
.        ...
.
.    </web-app>

At line 6 there's a duplicate <web-app> declaration. Get rid of it.