Scheduled action no interrupt

At the end of the run, ScheduledAction unsubscribes itself which triggers a set of cleanup actions, and since it is also the way to cancel a running action, it calls future.cancel(true) as well which interrupts the task in the underlying executor framework. However, on a normal completion path, it is unnecessary to interrupt itself at the end of the run since it will complete anyway, and not to mention, it has some performance implications for short running tasks. The downside is the +4 bytes per ScheduledAction.
The problem with such Thread interrupt is to make sure the interrupt happens while the task is running, otherwise, you risk interrupting someone else's task; The java FutureTask and Executors have delicate logic to make sure the call to cancel is delivered only if the task is active.