The demo netbeans projects found in src/demo/share/nbproject currently use the following combination of jvm arguments to set up debugging:

<jvmarg value="-Xdebug"/>
<jvmarg value="-Xnoagent"/>
<jvmarg value="-Djava.compiler=none"/>
<jvmarg value="-Xrunjdwp:transport=dt_socket,address=${jpda.address}"/>

They should instead just do:

<jvmarg value="-agentlib:jdwp=transport=dt_socket,server=n,suspend=n,address=${jpda.address}"/>

Additionally, the source dir set up in build.properties for these projects do not seem to align with the source layout.

'src.dir=${main.dir}/src' should instead be just 'src.dir=${main.dir}/'