at_exit hooks not called in worker processes

[avlazarov]

👋

I'm expecting the at_exit block from the worker class to be executed, but it's not

require 'serverengine'

module Worker
  extend self

  def run
    @stopped = false

    at_exit do
      puts 'Running at_exit hook!' # not printed
    end

    trap 'TERM' do
      @stopped = true
    end

    until @stopped
      puts 'Super hard work!'
      sleep 1
    end
  end
end

ServerEngine.create nil, Worker do
  {
    log: '-',
    worker_type: 'process',
  }
end.run

It seems that at_exit hooks are explicitly disabled in the ProcessManager#fork by using Kernel.exit! in the child process. Is there a reason for not allowing the hooks to be run?

P.S I'm aware of the ServerEngine::Worker#stop hook, but the idea is to have the application code (Rails) decide what to install as exit hooks.