fixing timeout in topology gen_server

Author: zookzook

lib/mongo/monitor.ex

@@ -95,7 +95,7 @@ defmodule Mongo.Monitor do
     else
       server_description = is_master(state.connection_pid, state.server_description, state.opts)
 
-      :ok = GenServer.call(state.topology_pid, {:server_description, server_description}, 30_000)
+      :ok = GenServer.cast(state.topology_pid, {:server_description, server_description})
       {:noreply, %{state | server_description: server_description}, state.heartbeat_frequency_ms}
     end
   end

lib/mongo/topology.ex

@@ -116,7 +116,7 @@ defmodule Mongo.Topology do
   end
 
   # see https://github.com/mongodb/specifications/blob/master/source/server-discovery-and-monitoring/server-discovery-and-monitoring.rst#updating-the-topologydescription
-  def handle_call({:server_description, server_description}, _from, state) do
+  def handle_cast({:server_description, server_description}, state) do
     new_state = handle_server_description(state, server_description)
     if state.topology != new_state.topology do
       :ok = Mongo.Events.notify(%TopologyDescriptionChangedEvent{
@@ -125,7 +125,7 @@ defmodule Mongo.Topology do
         new_description: new_state.topology
       })
     end
-    {:reply, :ok, new_state}
+    {:noreply, new_state}
   end
 
   def handle_call(:wait_for_connection, _from, %{connection_pools: pools} = state) when map_size(pools) > 0 do