Killing a process linked to `init` process kills the node.

[mmzeeman]

When havoc kills logger, heart or url_prim_loader it kills the entire node. Is this a feature or a bug? Or could it be that some internals of OTP has changed in such a way that havoc now tries to kill those processes?

I see that that havoc specifically checks to not kill application_controller, but there can be other processes linked to init too.

Would it be an idea to specifically check if a proces is linked to init? Or maybe introduce a configurable do_not_kill list with names of processes which should not be killed.

[ankhers]

It is possible logger, heart and url_prim_loader were added to OTP after I wrote this initial implementation. It should be easy enough to add them to the OTP_APPS definition that is currently used in order to not kill them by default.

There is already the killable_callback attribute that you can pass in the configuration in order to let you decide whether or not a given process should be killed. With that said, it is worth exploring whether other process should not be killed by default other than just the application_controller.