Concurrent Data Processing in Elixir: JobSupervisor does not go down (page 54)

[svilen]

No problem at all @kunna.

@kunna

what if “Jobber.JobSupervisor” was restarting its children? Isn’t there a possibility “Supervisor.count_children(pid).active == 0” will return true for a while?

If a child is being restarted, then which_children/1 will return :restarting for the second element in the tuple, so you can use that in combination with count_children/1. Please see the documentation for which_children/1.

@kunna

who should be responsible to run this code? I cannot think of a good place to add this code, should we add a new GenServer for this code?

Yes, you can make a JobTerminator GenServer that does that.