Yes it possible to run 2 weblogic (admin) server instances on a single physical box.
You need to create 2 domains for it.Both these admin server will be having different ports
There is no reason why you cannot run two admin servers on the same physical box provided that
1) they are not in the same domain - 1 running admin server per domain
2) they don't have the same ip/port - so you'd need to be careful and specify listen addresses and ports to prevent conflicts.
3) they have different server/domain names - WLS uses the names to lookup some component and naming can cause issues. It's documented somewhere.
But under same domain, I think they still will use the same JVM, I want to use 2 different JVM in this case, Is it possible to run 2 different instance s of weblogic server on the same machine but having 2 different JVM's.
Your help is highly appreciated.
Each server ( whether it's a admin or managed server ) use it's own JVM. If you want to use two Admin server ( which mean you should have to create two domain since each domain should have only one admin server ) then you can create and start, each will run on it's own jvm.