I just checked the documentation of jbpm, there is nowhere package org.jbpm.imp mentioned but the jbpm.war uses this package.
There is a class AdminBean in package org.jbpm.webapp.bean where class org.jbpm.scheduler.impl.Scheduler is imported.
Can anyone please tell me from where I can download this package. I already downloaded jbpm-starter kit , jbpm-jpdl plus its process designer etc.
I assume you meant "impl" when you wrote "imp", and "jbpm-console.war" when you wrote "jbpm.war".
This area has changed a lot... I suspect you're a victim of version skew of some kind.
In 3.2, there's no ...bean.AdminBean or ...impl.Scheduler - at least I can't find them.