Significance of running engines after processes end

[MaheshkumarSundaram]

Hi,

I could see that there are running engines in the Workbench UI after the processes end.
If I start processes, after their end events; I suppose there should no running engines right?
But I still see two running instances (in case of 2 processes) after their end events.

Could you please explain the significance behind this?

Aside from the above question, is the data.caseId unique across all instances?

Thanks!

[ralphhanna]

There is no real impact other than memory, and no real value of keeping them.

Therefore, in release 1.3.3 it removes completed engines.