Dummy tasks

[ni...@uom.gr.INVALID]

Hello

I am a researcher and newcome to Apache Storm. So I am sorry in advance 
in case my questions are a bit naive. While looking at UI, I see that 
there are executors on workers that do not belong to any component e.g. 
there are 5 executors while only 4 of them belong to the topology's 
components. What is the job of these extra executors?

Moreover, I try to make a new scheduler (using the IScheduler 
interface). I would like to ask if there is any way to add some dummy 
tasks (executors) per component in a topology to allocate them around 
workers along with normal tasks.

Thank you in advance for your time and help and congratulations for the 
excellent work you have done so far.

Kind regards,
Nicole