I need to run multiple(more than 4) instances of JBoss server on a single machine. I am using JBoss 4.2.3 GA.
I used this article to install mine. http://wiki.adempiere.net/Setup_2_Adempiere_JBoss_server_in_1_physical_server
You should create different services to control the adempiere servers.
Also if you work with jasper report, use unique file names for reports or you will face permission denied exception.
Ex : if you attach "report.jrxml" to two servers. Server will create /tmp/report.jrxml tmp file.
The second server will also try to create the same file and get crashed