Debug fess in EclipseIDE

(from github.com/rodrigobml)
I want to debug the fess project connected in my elasticsearch cluster, is it possible?

(from github.com/marevol)
I think it works if adding the following options as JVM options in Eclipse.

-Dfess.es.http_address=http://localhost:9200 -Dfess.es.transport_addresses=localhost:9300 -Dfess.dictionary.path=...(ex. /var/lib/elasticsearch/config/)