Question: Whats the best way to have file attachments in blocks like you can with nodes? Is this possible with an existing module?

Answer: 
You should start Glassfish with the debug instead of the run option inside the Servers view.
Hi all I found solution for debugging problem. In my case Eclipse Indigo and linux x64 it works. More details in other thread about the same error <https://stackoverflow.com/a/14551690/1976844>