For all those who are trying to run
JDK 6 + maven2 + embedded JBoss and keep getting the Array error,
The trick is to use the following system property

-Dsun.lang.ClassLoader.allowArraySyntax=true

But the trick is , that this is not needed on the mvn command line, but rather as a argument to the jvm which is forked by the maven-surefire-plugin.

So instead of mvn -Dsun.lang.ClassLoader.allowArraySyntax=true

What you should do is have the following in your pom.xml

<plugin>
 <groupId>org.apache.maven.plugins</groupId>
 <artifactId>maven-surefire-plugin</artifactId>
 <configuration>
 <!-- for JDK6 Support -->
 <argLine>-Dsun.lang.ClassLoader.allowArraySyntax=true</argLine>
 </configuration>
</plugin>

This should go under build->plugins node

The above will do the trick.

Hope this has helped :-)