non-working Agent reload code

gistfile1.txt

I have an Agent which processes a tree of TOML files on startup,
turning it into a tree of maps.  Occasionally, while debugging,
I'd like to reload this tree.  So, I set up a "/reload" page to:

- get the current time
- tell the Agent to print a message and then kill itself
- get the current time
- calculate the duration
- render a "reload" page

Although the message is getting printed, the "reload" page is
not appearing.  The browser says:

  This page isn’t working
  localhost didn’t send any data.

Suggestions?  See below for the relevant code...

=========================================================

defmodule PhxHttpWeb.Router do
  ...
  scope "/", PhxHttpWeb do
    ...
    get   "/reload", TreeController, :reload
    ...
  end
end

=========================================================

defmodule PhxHttpWeb.TreeController do
  ...
  def reload(conn, _params) do
    time_1    = Time.utc_now()
    message   = "Reloading by request."
    RefData.reload(message)
    time_2    = Time.utc_now()
    duration  = Time.diff(time_2, time_1, :millisecond)

    render(conn, "reload.html",
           duration:    duration,
           item_key:    nil)
  end
  ...
end

=========================================================

<!-- templates/tree/reload.html.eex -->

<h2>Reload</h2>

At your request, RefData.Server has been crashed and restarted,
causing the data to be reloaded from the TOML tree.
This process took approximately <%= @duration %> milliseconds.

=========================================================

defmodule RefData do
  ...
  defdelegate reload(message), to: Server
  ...
end

=========================================================

defmodule RefData.Server do
  ...
  def reload(message) do
    IO.puts message
    pid   = self()
    Process.exit(pid, :kill)
  end
  ...
  def start_link() do
    Agent.start_link(&build_map/0, name: @me)
  end

  def build_map() do
    tree_abs    = "/Users/rdm/_Work/P_Elixir/PA_hax/PA_toml" #K
    toml_map    = Loader.load(tree_abs)
    toml_ndx    = Indexer.index(toml_map)

    Map.put(toml_map, :index, toml_ndx)
  end
end
 
 =========================================================