Domain mode feature of JBoss allows to manage multiple server instances from a single control point. The server configuration of the domain is centralized in the domain.xml file of the domain controller. The domain.xml is located at domain/configuration/. It includes the main configuration for all server instances. This file is only required for the domain controller. In the domain.xml file, this file will use to define the server group configuration (which can be anyway changed at runtime). All the server groups which we will create or already created that will be define here. <server-groups> <server-group name="main-server-group" profile="full"> <jvm name="default"> <heap size="64m" max-size="512m"/> </jvm> <socket-binding-group ref="full-sockets"/> </server-group> ...