One other nice way how to debug JBoss & JBoss apps in Eclipse, is to create a simple project which depends on all your sources + JBoss build, e.g. something like:
<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>
<parent>
<groupId>yourgroup</groupId>
<artifactId>yourparent</artifactId>
<version>yourversion</version>
</parent>
<artifactId>yourapp-jboss-debug</artifactId>
<name>yourproject: JBoss Debug Project</name>
<description>yourproject: JBoss Debug Project</description>
<packaging>jar</packaging>
<!-- Dependency list -->
<dependencies>
<!-- Dependency to JBoss build which brings all jars and sources -->
<dependency>
<groupId>org.jboss.as</groupId>
<artifactId>jboss-as-build</artifactId>
<version>7.1.1.Final</version>
<type>pom</type>
</dependency>
<!-- Dependency to yourapp build which brings all jars and sources -->
<dependency>
<groupId>yourgroup</groupId>
<artifactId>yourproject which builds all the sources and gets deployed - probably the ear</artifactId>
<version>${project.version}</version>
<type>pom</type>
</dependency>
</dependencies>
</project>
Then you do "mvn clean install eclipse:eclipse -DdownloadSources=true" (of course with maven repo http://repository.jboss.org/nexus/content/groups/public configured in maven settings), import into Eclipse and configure your debug configuration in Eclipse to run in this project and voila, there it is, all the JBoss sources are attached!
https://community.jboss.org/servlet/JiveServlet/downloadImage/105-10288-19091/310-241/jbossdebug.png
