How can I understand if my system is using jBoss?

I have just noticed there is no space available in my server, therefore I need to remove something. It seems the /opt/jboss-6.1.0 directory is taking more than 200Gb (unbelievable). I would like to remove it, but I am not sure if the server is using jBoss (I don't even know what it is). How can I understand if removing this folder will cause problems to the server? (I know we are using Apache Web Server) I have checked processes with: ps aux | grep jboss but nothing is found.