Missing Maven Plugin Jetty

Check if it works after adding the following in settings.xml as documented.

<pluginGroups>
    <pluginGroup>org.mortbay.jetty</pluginGroup>
</pluginGroups>

Also note that there are two different versions of the plugin - the older maven-jetty-plugin and the newer jetty-maven-plugin.
_source

The instructions at (http://www.eclipse.org/jetty/documentation/current/jetty-maven-plugin.html) say to put the version as ${project.version} which is wrong! Also, the older documentation has the groupId set to org.codehaus.mojo it should be set to org.eclipse.jetty.

I added a real version from the jetty repo (http://repo.maven.apache.org/maven2/org/eclipse/jetty/jetty-maven-plugin/) and changed the groupId.

<plugin>
  <groupId>org.eclipse.jetty</groupId>
  <artifactId>jetty-maven-plugin</artifactId>
  <version>9.0.5.v20130815</version>
</plugin>

Make sure you are executing command 'mvn jetty:run', from inside your project directory. If you will listed the current directory you should see the pom.xml.

If you are in not in your project and running 'mvn jetty:run', will get Error "Missing Maven Plugin Jetty"

        <plugin>
            <groupId>org.mortbay.jetty</groupId>
            <artifactId>jetty-maven-plugin</artifactId>
            <version>8.1.12.v20130726</version>
            <configuration>
                <stopKey>todostop</stopKey>
                <stopPort>9999</stopPort>
            </configuration>
        </plugin>

Hope it will help

Did you add the plugin to the pom.xml? A quick google search found this:

<project>
  ...
  <build>
    ...
    <plugins>
      <plugin>
        <groupId>org.codehaus.mojo</groupId>
        <artifactId>jetty-maven-plugin</artifactId>
      </plugin>
    </plugins>
  </build>
</project>

Found here: http://mojo.codehaus.org/jetty-maven-plugin/usage.html