When I start JBoss v4.2.3 on my computer I get always an startup error java.rmi.server.ExportException: Port already in use: 1098 netstat -ano shows no other process which is blocking this port. So I decided to reserve ephemeral ports like described e.g. here: http://www.jboss.com/index.html?module=bb&op=viewtopic&t=64248 with a *.reg file like: [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters] "ReservedPorts"=hex(7):31,00,30,00,39,00,38,00,2d,00,31,00,30,00,39,00,39,00,\ 00,00,00,00 However this did not help. Why? The only way was to change the RmiPort in jboss-service.xml from 1098 to 1198 Why did the Registry patch not help? Do I have to re-boot for getting the Registry patch be active? Are there any problems when changing the jboss-service.xml RmiPort? Peter View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4184969#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...