diff --git a/README.md b/README.md
index 35ed465e8..a9c6e710f 100644
--- a/README.md
+++ b/README.md
@@ -28,7 +28,7 @@ git clone https://github.com/emqx/emqx-rel.git
 
 cd emqx-rel && make
 
-cd _rel/emqx && ./bin/emqx console
+cd _build/emqx/rel/emqx && ./bin/emqx console
 
 ```
 
diff --git a/etc/emqx.conf b/etc/emqx.conf
index 9ce950aae..df3be2a9a 100644
--- a/etc/emqx.conf
+++ b/etc/emqx.conf
@@ -145,7 +145,7 @@ cluster.autoclean = 5m
 
 ## The address type is used to extract host from k8s service.
 ##
-## Value: ip | dns
+## Value: ip | dns | hostname
 ## cluster.k8s.address_type = ip
 
 ## The app name helps build 'node.name'.
@@ -153,6 +153,11 @@ cluster.autoclean = 5m
 ## Value: String
 ## cluster.k8s.app_name = emqx
 
+## The suffix added to dns and hostname get from k8s service
+##
+## Value: String
+## cluster.k8s.suffix = pod.cluster.local
+
 ## Kubernates Namespace
 ##
 ## Value: String
@@ -1878,6 +1883,14 @@ plugins.expand_plugins_dir = {{ platform_plugins_dir }}/
 ## Default: 1m, 1 minute
 broker.sys_interval = 1m
 
+## System heartbeat interval of publishing following heart beat message:
+##  - "$SYS/brokers/<node>/uptime"
+##  - "$SYS/brokers/<node>/datetime"
+##
+## Value: Duration
+## Default: 30s
+broker.sys_heartbeat = 30s
+
 ## Enable global session registry.
 ##
 ## Value: on | off
diff --git a/priv/emqx.schema b/priv/emqx.schema
index 1366665ca..1d308476d 100644
--- a/priv/emqx.schema
+++ b/priv/emqx.schema
@@ -129,7 +129,7 @@
 ]}.
 
 {mapping, "cluster.k8s.address_type", "ekka.cluster_discovery", [
-  {datatype, {enum, [ip, dns]}}
+  {datatype, {enum, [ip, dns, hostname]}}
 ]}.
 
 {mapping, "cluster.k8s.app_name", "ekka.cluster_discovery", [
@@ -140,6 +140,11 @@
   {datatype, string}
 ]}.
 
+{mapping, "cluster.k8s.suffix", "ekka.cluster_discovery", [
+    {datatype, string},
+    {default, ""}
+  ]}.
+
 {translation, "ekka.cluster_discovery", fun(Conf) ->
   Strategy = cuttlefish:conf_get("cluster.discovery", Conf),
   Filter  = fun(Opts) -> [{K, V} || {K, V} <- Opts, V =/= undefined] end,
@@ -176,7 +181,8 @@
                   {service_name, cuttlefish:conf_get("cluster.k8s.service_name", Conf)},
                   {address_type, cuttlefish:conf_get("cluster.k8s.address_type", Conf, ip)},
                   {app_name, cuttlefish:conf_get("cluster.k8s.app_name", Conf)},
-                  {namespace, cuttlefish:conf_get("cluster.k8s.namespace", Conf)}];
+                  {namespace, cuttlefish:conf_get("cluster.k8s.namespace", Conf)},
+                  {suffix, cuttlefish:conf_get("cluster.k8s.suffix", Conf, "")}];
                (manual) ->
                  [ ]
             end,
@@ -1807,6 +1813,11 @@ end}.
   {default, "1m"}
 ]}.
 
+{mapping, "broker.sys_heartbeat", "emqx.broker_sys_heartbeat", [
+  {datatype, {duration, ms}},
+  {default, "30s"}
+]}.
+
 {mapping, "broker.enable_session_registry", "emqx.enable_session_registry", [
   {default, on},
   {datatype, flag}
diff --git a/rebar.config b/rebar.config
index 89b9436af..db7590567 100644
--- a/rebar.config
+++ b/rebar.config
@@ -4,7 +4,7 @@
      {gproc, "0.8.0"}, % hex
      {replayq, "0.1.1"}, %hex
      {esockd, "5.5.0"}, %hex
-     {ekka, {git, "https://github.com/emqx/ekka", {tag, "v0.5.7"}}},
+     {ekka, {git, "https://github.com/emqx/ekka", {tag, "v0.5.8"}}},
      {gen_rpc, {git, "https://github.com/emqx/gen_rpc", {tag, "2.3.1"}}},
      {cuttlefish, {git, "https://github.com/emqx/cuttlefish", {tag, "v3.0.0"}}}
     ]}.
diff --git a/src/emqx_channel.erl b/src/emqx_channel.erl
index 65d34d740..5aaa62b30 100644
--- a/src/emqx_channel.erl
+++ b/src/emqx_channel.erl
@@ -148,6 +148,7 @@ call(CPid, Req) ->
 %%--------------------------------------------------------------------
 
 init({Transport, RawSocket, Options}) ->
+    process_flag(trap_exit, true),
     {ok, Socket} = Transport:wait(RawSocket),
     {ok, Peername} = Transport:ensure_ok_or_exit(peername, [Socket]),
     {ok, Sockname} = Transport:ensure_ok_or_exit(sockname, [Socket]),
@@ -365,6 +366,16 @@ handle(info, {shutdown, conflict, {ClientId, NewPid}}, State) ->
 handle(info, {shutdown, Reason}, State) ->
     shutdown(Reason, State);
 
+handle(info, Info = {'EXIT', SessionPid, Reason}, State = #state{proto_state = ProtoState}) ->
+    case emqx_protocol:session(ProtoState) of
+        undefined ->
+            ?LOG(error, "Unexpected EXIT: ~p", [Info]),
+            {keep_state, State};
+        SessionPid ->
+            ?LOG(error, "Session ~p termiated: ~p", [SessionPid, Reason]),
+            shutdown(Reason, State)
+    end;
+
 handle(info, Info, State) ->
     ?LOG(error, "Unexpected info: ~p", [Info]),
     {keep_state, State}.
@@ -499,6 +510,8 @@ maybe_gc(_, State) -> State.
 reply(From, Reply, State) ->
     {keep_state, State, [{reply, From, Reply}]}.
 
+shutdown(Reason = {shutdown, _}, State) ->
+    stop(Reason, State);
 shutdown(Reason, State) ->
     stop({shutdown, Reason}, State).
 
diff --git a/src/emqx_rpc.erl b/src/emqx_rpc.erl
index 4d01b6229..96adf6605 100644
--- a/src/emqx_rpc.erl
+++ b/src/emqx_rpc.erl
@@ -23,18 +23,28 @@
 -define(RPC, gen_rpc).
 
 call(Node, Mod, Fun, Args) ->
-    filter_result(?RPC:call(Node, Mod, Fun, Args)).
+    filter_result(?RPC:call(rpc_node(Node), Mod, Fun, Args)).
 
 multicall(Nodes, Mod, Fun, Args) ->
-    filter_result(?RPC:multicall(Nodes, Mod, Fun, Args)).
+    filter_result(?RPC:multicall(rpc_nodes(Nodes), Mod, Fun, Args)).
 
 cast(Node, Mod, Fun, Args) ->
-    filter_result(?RPC:cast(Node, Mod, Fun, Args)).
+    filter_result(?RPC:cast(rpc_node(Node), Mod, Fun, Args)).
 
+rpc_node(Node) ->
+    {Node, erlang:system_info(scheduler_id)}.
+
+rpc_nodes(Nodes) ->
+    rpc_nodes(Nodes, []).
+
+rpc_nodes([], Acc) ->
+    Acc;
+rpc_nodes([Node | Nodes], Acc) ->
+    rpc_nodes(Nodes, [rpc_node(Node) | Acc]).
+
+
+filter_result({Error, Reason})
+  when Error =:= badrpc; Error =:= badtcp ->
+    {badrpc, Reason};
 filter_result(Delivery) ->
-    case Delivery of 
-        {badrpc, Reason} -> {badrpc, Reason};
-        {badtcp, Reason} -> {badrpc, Reason};
-        _ -> Delivery
-    end.
-
+    Delivery.
diff --git a/src/emqx_session.erl b/src/emqx_session.erl
index 392ce77f5..7d23c9e62 100644
--- a/src/emqx_session.erl
+++ b/src/emqx_session.erl
@@ -626,7 +626,7 @@ handle_info({'EXIT', ConnPid, Reason}, State = #state{will_msg = WillMsg, expiry
         _ ->
             send_willmsg(WillMsg)
     end,
-    {stop, Reason, State#state{will_msg = undefined, conn_pid = undefined}};
+    shutdown(Reason, State#state{will_msg = undefined, conn_pid = undefined});
 
 handle_info({'EXIT', ConnPid, Reason}, State = #state{conn_pid = ConnPid}) ->
     State1 = case Reason of
@@ -652,23 +652,13 @@ handle_info(Info, State) ->
 
 terminate(Reason, #state{will_msg = WillMsg,
                          client_id = ClientId,
-                         username = Username,
-                         conn_pid = ConnPid,
-                         old_conn_pid = OldConnPid}) ->
+                         username = Username}) ->
     send_willmsg(WillMsg),
-    [maybe_shutdown(Pid, Reason) || Pid <- [ConnPid, OldConnPid]],
     ok = emqx_hooks:run('session.terminated', [#{client_id => ClientId, username => Username}, Reason]).
 
 code_change(_OldVsn, State, _Extra) ->
     {ok, State}.
 
-maybe_shutdown(undefined, _Reason) ->
-    ok;
-maybe_shutdown(Pid, normal) ->
-    Pid ! {shutdown, normal};
-maybe_shutdown(Pid, Reason) ->
-    exit(Pid, Reason).
-
 %%------------------------------------------------------------------------------
 %% Internal functions
 %%------------------------------------------------------------------------------
diff --git a/src/emqx_sys.erl b/src/emqx_sys.erl
index 37e22856f..51d0d8cb9 100644
--- a/src/emqx_sys.erl
+++ b/src/emqx_sys.erl
@@ -28,6 +28,7 @@
         , datetime/0
         , sysdescr/0
         , sys_interval/0
+        , sys_heatbeat_interval/0
         ]).
 
 -export([info/0]).
@@ -92,6 +93,11 @@ datetime() ->
 sys_interval() ->
     application:get_env(?APP, broker_sys_interval, 60000).
 
+%% @doc Get sys heatbeat interval
+-spec(sys_heatbeat_interval() -> pos_integer()).
+sys_heatbeat_interval() ->
+    application:get_env(?APP, sys_heartbeat, 30000).
+
 %% @doc Get sys info
 -spec(info() -> list(tuple())).
 info() ->
@@ -111,7 +117,7 @@ init([]) ->
     {ok, heartbeat(tick(State))}.
 
 heartbeat(State) ->
-    State#state{heartbeat = start_timer(timer:seconds(1), heartbeat)}.
+    State#state{heartbeat = start_timer(sys_heatbeat_interval(), heartbeat)}.
 tick(State) ->
     State#state{ticker = start_timer(sys_interval(), tick)}.
 
diff --git a/src/emqx_ws_channel.erl b/src/emqx_ws_channel.erl
index 9571baab8..23a4d8d4c 100644
--- a/src/emqx_ws_channel.erl
+++ b/src/emqx_ws_channel.erl
@@ -299,30 +299,49 @@ websocket_info({shutdown, Reason}, State) ->
 websocket_info({stop, Reason}, State) ->
     {stop, State#state{shutdown = Reason}};
 
+websocket_info(Info = {'EXIT', SessionPid, Reason}, State = #state{proto_state = ProtoState}) ->
+    case emqx_protocol:session(ProtoState) of
+        undefined ->
+            ?LOG(error, "Unexpected EXIT: ~p", [Info]),
+            {ok, State};
+        SessionPid ->
+            ?LOG(error, "Session ~p termiated: ~p", [SessionPid, Reason]),
+            shutdown(Reason, State)
+    end;
+
 websocket_info(Info, State) ->
     ?LOG(error, "Unexpected info: ~p", [Info]),
     {ok, State}.
 
-terminate(SockError, _Req, #state{keepalive   = Keepalive,
-                                  proto_state = ProtoState,
-                                  shutdown    = Shutdown}) ->
-    ?LOG(debug, "Terminated for ~p, sockerror: ~p",
-         [Shutdown, SockError]),
+terminate(WsReason, _Req, #state{keepalive   = Keepalive,
+                                 proto_state = ProtoState,
+                                 shutdown    = Shutdown}) ->
+    ?LOG(debug, "Terminated for ~p, websocket reason: ~p",
+         [Shutdown, WsReason]),
     emqx_keepalive:cancel(Keepalive),
     case {ProtoState, Shutdown} of
         {undefined, _} -> ok;
         {_, {shutdown, Reason}} ->
-            emqx_protocol:terminate(Reason, ProtoState),
-            exit(Reason);
-        {_, Error} ->
-            emqx_protocol:terminate(Error, ProtoState),
-            exit({error, SockError})
+            terminate_session(Reason, ProtoState);
+        {_, _Error} ->
+            ?LOG(info, "Terminate for unexpected error: ~p", [WsReason]),
+            terminate_session(unknown, ProtoState)
     end.
 
 %%--------------------------------------------------------------------
 %% Internal functions
 %%--------------------------------------------------------------------
 
+terminate_session(Reason, ProtoState) ->
+    emqx_protocol:terminate(Reason, ProtoState),
+    case emqx_protocol:session(ProtoState) of
+        undefined ->
+            ok;
+        SessionPid ->
+            unlink(SessionPid),
+            SessionPid ! {'EXIT', self(), Reason}
+    end.
+
 handle_incoming(Packet, SuccFun, State = #state{proto_state = ProtoState}) ->
     case emqx_protocol:received(Packet, ProtoState) of
         {ok, NProtoState} ->
@@ -343,6 +362,9 @@ ensure_stats_timer(State = #state{enable_stats = true,
 ensure_stats_timer(State) ->
     State.
 
+shutdown(Reason = {shutdown, _}, State) ->
+    self() ! {stop, Reason},
+    {ok, State};
 shutdown(Reason, State) ->
     %% Fix the issue#2591(https://github.com/emqx/emqx/issues/2591#issuecomment-500278696)
     self() ! {stop, {shutdown, Reason}},