diff --git a/CHANGES-4.3.md b/CHANGES-4.3.md
index 92cec7703..7c421f75e 100644
--- a/CHANGES-4.3.md
+++ b/CHANGES-4.3.md
@@ -17,6 +17,10 @@ File format:
 * Fix updating `emqx_auth_mnesia.conf` password and restarting the new password does not take effect [#6717]
 * Fix import data crash when emqx_auth_mnesia's record is not empty [#6717]
 * Fix `os_mon.sysmem_high_watermark` may not alert after reboot.
+* Enhancement: Log client status before killing it for holding the lock for too long.
+  [emqx-6959](https://github.com/emqx/emqx/pull/6959)
+  [ekka-144](https://github.com/emqx/ekka/pull/144)
+  [ekka-146](https://github.com/emqx/ekka/pull/146)
 
 ## v4.3.11
 
@@ -46,7 +50,7 @@ Important notes:
 * Clustering malfunction fixes [#6221, #6381]
   Mostly changes made in [ekka](https://github.com/emqx/ekka/pull/134)<br>
   From 0.8.1.4 to 0.8.1.6, fixes included intra-cluster RPC call timeouts,<br>
-  also fixed `ekka_locker` process crashe after killing a hanged lock owner.
+  also fixed `ekka_locker` process crashed after killing a hanged lock owner.
 
 * Improved log message when TCP proxy is in use but proxy_protocol configuration is not turned on [#6416]<br>
   "please check proxy_protocol config for specific listeners and zones" to hint a misconfiguration
@@ -101,6 +105,8 @@ Important notes:
   properties such as protocol name, protocol version, username (if any) peer-host<br>
   etc. are filled as MQTT message headers.
 
+* Format the message id to hex strings in the log message [#6961]
+
 ## v4.3.0~10
 
 Older version changes are not tracked here.
diff --git a/CHANGES-4.4.md b/CHANGES-4.4.md
index e26663ea7..50105a4df 100644
--- a/CHANGES-4.4.md
+++ b/CHANGES-4.4.md
@@ -1,6 +1,8 @@
 # EMQ X 4.4 Changes
 
-## 4.4-beta.1
+## v4.4.0
+
+**NOTE**: v4.4.0 is in sync with: v4.3.12
 
 ### Important changes
 
@@ -14,6 +16,10 @@
 
 - Support dynamic modification of MQTT Keep Alive to adapt to different energy consumption strategies.
 
+- Support 4.3 to 4.4 rolling upgrade of clustered nodes. See upgrade document for more dtails.
+
+- TLS for cluster backplane (RPC) connections. See clustering document for more details.
+
 ### Minor changes
 
 - Bumpped default boot wait time from 15 seconds to 150 seconds
@@ -41,21 +47,3 @@
 - HTTP client performance improvement
 
 - Add openssl-1.1 to RPM dependency
-
-### Bug fixes
-
-- Fix the issue that the client process becomes unresponsive due to the blockage of RPC calls between nodes
-
-- Fix the issue that the lock management process `ekka_locker` crashes after killing the suspended lock owner
-
-- Fix the issue that the Path parameter of WebHook action in rule engine cannot use the rule engine variable
-
-- Fix MongoDB authentication module cannot use Replica Set mode and other issues
-
-- Fix the issue of out-of-sequence message forwarding between clusters. The relevant configurable item is `rpc.tcp_client_num`
-
-- Fix the issue of incorrect calculation of memory usage
-
-- Fix MQTT bridge malfunction when remote host is unreachable (hangs the connection)
-
-- Fix the issue that HTTP headers may be duplicated
diff --git a/apps/emqx_stomp/src/emqx_stomp_frame.erl b/apps/emqx_stomp/src/emqx_stomp_frame.erl
index fa37c2f64..51f23e778 100644
--- a/apps/emqx_stomp/src/emqx_stomp_frame.erl
+++ b/apps/emqx_stomp/src/emqx_stomp_frame.erl
@@ -123,6 +123,8 @@ parse(<<>>, Parser) ->
 
 parse(Bytes, #{phase := body, length := Len, state := State}) ->
     parse(body, Bytes, State, Len);
+parse(<<?LF, Bytes/binary>>, #{phase := hdname, state := State}) ->
+    parse(body, Bytes, State, content_len(State));
 parse(Bytes, #{phase := Phase, state := State}) when Phase =/= none ->
     parse(Phase, Bytes, State);
 
diff --git a/apps/emqx_stomp/test/emqx_stomp_SUITE.erl b/apps/emqx_stomp/test/emqx_stomp_SUITE.erl
index e2599ab51..f4503d791 100644
--- a/apps/emqx_stomp/test/emqx_stomp_SUITE.erl
+++ b/apps/emqx_stomp/test/emqx_stomp_SUITE.erl
@@ -359,6 +359,35 @@ t_1000_msg_send(_) ->
         lists:foreach(fun(_) -> RecvFun() end, lists:seq(1, 1000))
     end).
 
+t_sticky_packets_truncate_after_headers(_) ->
+    with_connection(fun(Sock) ->
+        gen_tcp:send(Sock, serialize(<<"CONNECT">>,
+                                     [{<<"accept-version">>, ?STOMP_VER},
+                                      {<<"host">>, <<"127.0.0.1:61613">>},
+                                      {<<"login">>, <<"guest">>},
+                                      {<<"passcode">>, <<"guest">>},
+                                      {<<"heart-beat">>, <<"0,0">>}])),
+        {ok, Data} = gen_tcp:recv(Sock, 0),
+        {ok, #stomp_frame{command = <<"CONNECTED">>,
+                          headers = _,
+                          body    = _}, _} = parse(Data),
+
+        Topic = <<"/queue/foo">>,
+
+        emqx:subscribe(Topic),
+        gen_tcp:send(Sock, ["SEND\n",
+                            "content-length:3\n",
+                            "destination:/queue/foo\n"]),
+        timer:sleep(300),
+        gen_tcp:send(Sock, ["\nfoo",0]),
+        receive
+            {deliver, Topic, _Msg}->
+                ok
+        after 100 ->
+                  ?assert(false, "waiting message timeout")
+        end
+    end).
+
 with_connection(DoFun) ->
     {ok, Sock} = gen_tcp:connect({127, 0, 0, 1},
                                  61613,
diff --git a/rebar.config b/rebar.config
index 9c2b72881..0778d3961 100644
--- a/rebar.config
+++ b/rebar.config
@@ -43,7 +43,7 @@
     , {jiffy, {git, "https://github.com/emqx/jiffy", {tag, "1.0.5"}}}
     , {cowboy, {git, "https://github.com/emqx/cowboy", {tag, "2.9.0"}}}
     , {esockd, {git, "https://github.com/emqx/esockd", {tag, "5.8.4"}}}
-    , {ekka, {git, "https://github.com/emqx/ekka", {tag, "0.8.1.7"}}}
+    , {ekka, {git, "https://github.com/emqx/ekka", {tag, "0.8.1.8"}}}
     , {gen_rpc, {git, "https://github.com/emqx/gen_rpc", {tag, "2.7.0"}}}
     , {cuttlefish, {git, "https://github.com/emqx/cuttlefish", {tag, "v3.3.6"}}}
     , {minirest, {git, "https://github.com/emqx/minirest", {tag, "0.3.7"}}}
diff --git a/src/emqx.appup.src b/src/emqx.appup.src
index 66194a6bb..87b70308a 100644
--- a/src/emqx.appup.src
+++ b/src/emqx.appup.src
@@ -11,6 +11,7 @@
     , {load_module,emqx_os_mon,brutal_purge,soft_purge,[]}
     , {load_module,emqx,brutal_purge,soft_purge,[]}
     , {load_module,emqx_app,brutal_purge,soft_purge,[]}
+    , {load_module,emqx_message,brutal_purge,soft_purge,[]}
     , {load_module,emqx_limiter,brutal_purge,soft_purge,[]}
     ]},
    {<<".*">>,[]}
@@ -26,6 +27,7 @@
     , {load_module,emqx_os_mon,brutal_purge,soft_purge,[]}
     , {load_module,emqx,brutal_purge,soft_purge,[]}
     , {load_module,emqx_app,brutal_purge,soft_purge,[]}
+    , {load_module,emqx_message,brutal_purge,soft_purge,[]}
     , {load_module,emqx_limiter,brutal_purge,soft_purge,[]}
     ]},
    {<<".*">>,[]}
diff --git a/src/emqx_message.erl b/src/emqx_message.erl
index faae621d8..a0ee98434 100644
--- a/src/emqx_message.erl
+++ b/src/emqx_message.erl
@@ -342,7 +342,13 @@ format(#message{id = Id,
                 flags = Flags,
                 headers = Headers}) ->
     io_lib:format("Message(Id=~s, QoS=~w, Topic=~s, From=~p, Flags=~s, Headers=~s)",
-                  [Id, QoS, Topic, From, format(flags, Flags), format(headers, Headers)]).
+                  [printable_msg_id(Id), QoS, Topic, From, format(flags, Flags),
+                   format(headers, Headers)]).
+
+printable_msg_id(undefined) ->
+    <<>>;
+printable_msg_id(Id) ->
+    emqx_guid:to_hexstr(Id).
 
 format(flags, Flags) ->
     io_lib:format("~p", [[Flag || {Flag, true} <- maps:to_list(Flags)]]);