Starting multiple tasks where one fails to launch results in tasks running with no manager #9
Description
Starting multiple tasks where one fails to launch results in zombies. If there are tasks A, B and C. Task C has incorrect permissions. When starting the wp manager tasks A and B are started correctly, task C fails to start. The wp manager then exists straight away and leaves all instances of A and B running.
As a consequence when restarting the wp manager there are messages about receiving keep-alives for workers that are not registered.
So I think the options are these:
- Workers die when they don't have a manager (not sure this is feasible)
- Don't start workers until we are more sure all tasks will start
- Kill old tasks if they are running, on wp manager restart
- Adopt old tasks and allow the manager to re-balance to get the correct cardinality