diff --git a/CHANGES-4.3.md b/CHANGES-4.3.md
index 57d921c16..592e282c7 100644
--- a/CHANGES-4.3.md
+++ b/CHANGES-4.3.md
@@ -20,6 +20,8 @@ File format:
 - Fixed crash when shared persistent subscription [#8441]
 - Fixed issue in Lua hook that prevented messages from being
   rejected [#8535]
+- Fix ExProto UDP client keepalive checking error.
+  This causes the clients to not expire as long as a new UDP packet arrives [#8575]
 
 ### Enhancements
 - HTTP API(GET /rules/) support for pagination and fuzzy filtering. [#8450]
diff --git a/apps/emqx_exproto/src/emqx_exproto.app.src b/apps/emqx_exproto/src/emqx_exproto.app.src
index 41c19f752..76bc9fa85 100644
--- a/apps/emqx_exproto/src/emqx_exproto.app.src
+++ b/apps/emqx_exproto/src/emqx_exproto.app.src
@@ -1,6 +1,6 @@
 {application, emqx_exproto,
  [{description, "EMQ X Extension for Protocol"},
-  {vsn, "4.3.8"}, %% 4.3.3 is used by ee
+  {vsn, "4.3.9"}, %% 4.3.3 is used by ee
   {modules, []},
   {registered, []},
   {mod, {emqx_exproto_app, []}},
diff --git a/apps/emqx_exproto/src/emqx_exproto.appup.src b/apps/emqx_exproto/src/emqx_exproto.appup.src
index 33bd4386c..d6406b239 100644
--- a/apps/emqx_exproto/src/emqx_exproto.appup.src
+++ b/apps/emqx_exproto/src/emqx_exproto.appup.src
@@ -1,9 +1,7 @@
 %% -*- mode: erlang -*-
 %% Unless you know what you are doing, DO NOT edit manually!!
 {VSN,
-  [{<<"4\\.3\\.[6-7]">>,
-    [{load_module,emqx_exproto_channel,brutal_purge,soft_purge,[]}]},
-   {<<"4\\.3\\.[2-5]">>,
+  [{<<"4\\.3\\.[2-8]">>,
     [{load_module,emqx_exproto_conn,brutal_purge,soft_purge,[]},
      {load_module,emqx_exproto_channel,brutal_purge,soft_purge,[]}]},
    {<<"4\\.3\\.[0-1]">>,
@@ -12,9 +10,7 @@
      {load_module,emqx_exproto_conn,brutal_purge,soft_purge,[]},
      {load_module,emqx_exproto_channel,brutal_purge,soft_purge,[]}]},
    {<<".*">>,[]}],
-  [{<<"4\\.3\\.[6-7]">>,
-    [{load_module,emqx_exproto_channel,brutal_purge,soft_purge,[]}]},
-   {<<"4\\.3\\.[2-5]">>,
+  [{<<"4\\.3\\.[2-8]">>,
     [{load_module,emqx_exproto_conn,brutal_purge,soft_purge,[]},
      {load_module,emqx_exproto_channel,brutal_purge,soft_purge,[]}]},
    {<<"4\\.3\\.[0-1]">>,
diff --git a/apps/emqx_exproto/src/emqx_exproto_channel.erl b/apps/emqx_exproto/src/emqx_exproto_channel.erl
index dce3b36e1..80e5f4045 100644
--- a/apps/emqx_exproto/src/emqx_exproto_channel.erl
+++ b/apps/emqx_exproto/src/emqx_exproto_channel.erl
@@ -260,7 +260,8 @@ handle_timeout(_TRef, {keepalive, StatVal},
             {ok, reset_timer(alive_timer, NChannel)};
         {error, timeout} ->
             Req = #{type => 'KEEPALIVE'},
-            {ok, try_dispatch(on_timer_timeout, wrap(Req), Channel)}
+            NChannel = clean_timer(alive_timer, Channel),
+            {ok, try_dispatch(on_timer_timeout, wrap(Req), NChannel)}
     end;
 
 handle_timeout(_TRef, force_close, Channel = #channel{closed_reason = Reason}) ->
@@ -327,7 +328,7 @@ handle_call({start_timer, keepalive, Interval},
     NConnInfo = ConnInfo#{keepalive => Interval},
     NClientInfo = ClientInfo#{keepalive => Interval},
     NChannel = Channel#channel{conninfo = NConnInfo, clientinfo = NClientInfo},
-    {reply, ok, ensure_keepalive(NChannel)};
+    {reply, ok, [{event, updated}], ensure_keepalive(NChannel)};
 
 handle_call({subscribe, TopicFilter, Qos},
             Channel = #channel{
@@ -339,13 +340,13 @@ handle_call({subscribe, TopicFilter, Qos},
             {reply, {error, ?RESP_PERMISSION_DENY, <<"ACL deny">>}, Channel};
         _ ->
             {ok, NChannel} = do_subscribe([{TopicFilter, #{qos => Qos}}], Channel),
-            {reply, ok, NChannel}
+            {reply, ok, [{event, updated}], NChannel}
     end;
 
 handle_call({unsubscribe, TopicFilter},
             Channel = #channel{conn_state = connected}) ->
     {ok, NChannel} = do_unsubscribe([{TopicFilter, #{}}], Channel),
-    {reply, ok, NChannel};
+    {reply, ok, [{event, updated}], NChannel};
 
 handle_call({publish, Topic, Qos, Payload},
             Channel = #channel{
diff --git a/apps/emqx_exproto/src/emqx_exproto_conn.erl b/apps/emqx_exproto/src/emqx_exproto_conn.erl
index 0e83e96c4..152c0edf1 100644
--- a/apps/emqx_exproto/src/emqx_exproto_conn.erl
+++ b/apps/emqx_exproto/src/emqx_exproto_conn.erl
@@ -211,16 +211,35 @@ esockd_setopts({esockd_transport, Socket}, Opts) ->
     %% FIXME: DTLS works??
     esockd_transport:setopts(Socket, Opts).
 
-esockd_getstat({udp, _SockPid, Sock}, Stats) ->
-    inet:getstat(Sock, Stats);
 esockd_getstat({esockd_transport, Sock}, Stats) ->
-    esockd_transport:getstat(Sock, Stats).
+    esockd_transport:getstat(Sock, Stats);
+esockd_getstat({udp, _SockPid, _Sock}, Stats) ->
+    {ok, lists:map(fun(K) -> {K, get_stats(K)} end, Stats)}.
 
-send(Data, #state{socket = {udp, _SockPid, Sock}, peername = {Ip, Port}}) ->
+send(Data, State = #state{socket = {udp, _SockPid, Sock}, peername = {Ip, Port}}) ->
+    incr_send_stats(Data, State),
     gen_udp:send(Sock, Ip, Port, Data);
 send(Data, #state{socket = {esockd_transport, Sock}}) ->
     esockd_transport:async_send(Sock, Data).
 
+incr_recv_stats(Data, #state{socket = {udp, _, _}}) ->
+    incr_stats(recv_oct, byte_size(Data)),
+    incr_stats(recv_cnt, 1).
+
+incr_send_stats(Data, #state{socket = {udp, _, _}}) ->
+    incr_stats(send_oct, byte_size(Data)),
+    incr_stats(send_cnt, 1).
+
+incr_stats(Key, Cnt) ->
+    Cnt0 = get_stats(Key),
+    put({stats, Key}, Cnt0 + Cnt).
+
+get_stats(Key) ->
+    case get({stats, Key}) of
+        undefined -> 0;
+        Cnt -> Cnt
+    end.
+
 %%--------------------------------------------------------------------
 %% callbacks
 %%--------------------------------------------------------------------
@@ -386,6 +405,7 @@ handle_msg({'$gen_cast', Req}, State) ->
     with_channel(handle_cast, [Req], State);
 
 handle_msg({datagram, _SockPid, Data}, State) ->
+    incr_recv_stats(Data, State),
     process_incoming(Data, State);
 
 handle_msg({Inet, _Sock, Data}, State) when Inet == tcp; Inet == ssl ->
@@ -450,11 +470,11 @@ handle_msg({event, disconnected}, State = #state{channel = Channel}) ->
     emqx_cm:connection_closed(ClientId),
     {ok, State};
 
-%handle_msg({event, _Other}, State = #state{channel = Channel}) ->
-%    ClientId = emqx_exproto_channel:info(clientid, Channel),
-%    emqx_cm:set_chan_info(ClientId, info(State)),
-%    emqx_cm:set_chan_stats(ClientId, stats(State)),
-%    {ok, State};
+handle_msg({event, _Other}, State = #state{channel = Channel}) ->
+    ClientId = emqx_exproto_channel:info(clientid, Channel),
+    emqx_cm:set_chan_info(ClientId, info(State)),
+    emqx_cm:set_chan_stats(ClientId, stats(State)),
+    {ok, State};
 
 handle_msg({timeout, TRef, TMsg}, State) ->
     handle_timeout(TRef, TMsg, State);
diff --git a/test/emqx_shared_sub_SUITE.erl b/test/emqx_shared_sub_SUITE.erl
index 30bd96a66..02c4c6598 100644
--- a/test/emqx_shared_sub_SUITE.erl
+++ b/test/emqx_shared_sub_SUITE.erl
@@ -37,11 +37,18 @@ all() -> emqx_ct:all(?SUITE).
 init_per_suite(Config) ->
     net_kernel:start(['master@127.0.0.1', longnames]),
     emqx_ct_helpers:boot_modules(all),
+    PortDiscovery = application:get_env(gen_rpc, port_discovery),
+    application:set_env(gen_rpc, port_discovery, stateless),
+    application:ensure_all_started(gen_rpc),
     emqx_ct_helpers:start_apps([]),
-    Config.
+    [{port_discovery, PortDiscovery} | Config].
 
-end_per_suite(_Config) ->
-    emqx_ct_helpers:stop_apps([]).
+end_per_suite(Config) ->
+    emqx_ct_helpers:stop_apps([gen_rpc]),
+    case proplists:get_value(port_discovery, Config) of
+      {ok, OldValue} -> application:set_env(gen_rpc, port_discovery, OldValue);
+      _ -> ok
+    end.
 
 t_is_ack_required(_) ->
     ?assertEqual(false, emqx_shared_sub:is_ack_required(#message{headers = #{}})).
@@ -284,7 +291,7 @@ test_two_messages(Strategy, Group) ->
     ok.
 
 last_message(ExpectedPayload, Pids) ->
-    last_message(ExpectedPayload, Pids, 100).
+    last_message(ExpectedPayload, Pids, 6000).
 
 last_message(ExpectedPayload, Pids, Timeout) ->
     receive
@@ -336,7 +343,7 @@ t_per_group_config(_) ->
     test_two_messages(round_robin, <<"round_robin_group">>).
 
 t_local(_) ->
-    Node = start_slave('local_shared_sub_test', 21884),
+    Node = start_slave('local_shared_sub_test19', 21884),
     GroupConfig = #{
                     <<"local_group_fallback">> => local,
                     <<"local_group">> => local,
@@ -392,7 +399,7 @@ t_local_fallback(_) ->
     Topic = <<"local_foo/bar">>,
     ClientId1 = <<"ClientId1">>,
     ClientId2 = <<"ClientId2">>,
-    Node = start_slave('local_fallback_shared_sub_test', 11885),
+    Node = start_slave('local_fallback_shared_sub_test19', 11885),
 
     {ok, ConnPid1} = emqtt:start_link([{clientid, ClientId1}]),
     {ok, _} = emqtt:connect(ConnPid1),
@@ -401,10 +408,10 @@ t_local_fallback(_) ->
 
     emqtt:subscribe(ConnPid1, {<<"$share/local_group_fallback/local_foo/bar">>, 0}),
 
-    emqx:publish(Message1),
+    [{share, <<"local_foo/bar">>, {ok, 1}}] = emqx:publish(Message1),
     {true, UsedSubPid1} = last_message(<<"hello1">>, [ConnPid1]),
 
-    rpc:call(Node, emqx, publish, [Message2]),
+    [{share, <<"local_foo/bar">>, {ok, 1}}] = rpc:call(Node, emqx, publish, [Message2]),
     {true, UsedSubPid2} = last_message(<<"hello2">>, [ConnPid1]),
 
     emqtt:stop(ConnPid1),
@@ -537,7 +544,7 @@ start_slave(Name, Port) ->
                                  {erl_flags, ebin_path()}]),
 
     pong = net_adm:ping(Node),
-    setup_node(Node, Port),
+    ok = setup_node(Node, Port),
     Node.
 
 stop_slave(Node) ->
@@ -563,8 +570,7 @@ setup_node(Node, Port) ->
                      name => "internal",
                      opts => [{zone,internal}],
                      proto => tcp}]),
-                application:set_env(gen_rpc, port_discovery, manual),
-                application:set_env(gen_rpc, tcp_server_port, Port * 2),
+                application:set_env(gen_rpc, port_discovery, stateless),
                 ok;
            (_) ->
                 ok
@@ -572,7 +578,13 @@ setup_node(Node, Port) ->
 
     [ok = rpc:call(Node, application, load, [App]) || App <- [gen_rpc, emqx]],
     ok = rpc:call(Node, emqx_ct_helpers, start_apps, [[emqx], EnvHandler]),
-
     rpc:call(Node, ekka, join, [node()]),
 
+    %% Sanity check. Assert that `gen_rpc' is set up correctly:
+    ?assertEqual( Node
+                , gen_rpc:call(Node, erlang, node, [])
+                ),
+    ?assertEqual( node()
+                , gen_rpc:call(Node, gen_rpc, call, [node(), erlang, node, []])
+                ),
     ok.