I have a Registry to create dynamic GenServers (each holding users’ parameters). I want to be able to take advantage of GenServer’s distributed multi_call / abcast, but since I’m using Registry, I must use a via tuple. Seems that mutli_call doesn’t like via tuples… Am I doing something wrong, is this by design, bug, or…? Thanks!

  def start_link(uid, pid, params \\ %{}) do
    GenServer.start_link(__MODULE__, [{pid, params}], name: via_tuple(uid))
  end

  defp via_tuple(uid), do: {:via, Registry, {@users_registry_name, uid}}
  
  def get_params(uid) do
    {replies, _bad} = via_tuple(uid) |> GenServer.multi_call(:get_params)
  end

Error returned:

** (FunctionClauseError) no function clause matching in :gen_server.start_monitor/2
        (stdlib) gen_server.erl:576: :gen_server.start_monitor(:node1@host, {:via, Registry, {:users_registry, "test"}})
        (stdlib) gen_server.erl:467: :gen_server.send_nodes/5
        (stdlib) gen_server.erl:425: :gen_server.do_multi_call/4
(project_name) lib/project_name/users_monitor.ex:17: ProjectName.UsersMonitor.get_params/1