fix: find SubOpts by shared_record, not deliver topic

apps/emqx/src/emqx_session.erl

@@ -409,18 +409,14 @@ enrich_delivers(ClientInfo, [D | Rest], UpgradeQoS, Session) ->
             [Msg | enrich_delivers(ClientInfo, Rest, UpgradeQoS, Session)]
     end.
 
-enrich_deliver(
-    ClientInfo,
-    {deliver, Topic, Msg = #message{headers = #{redispatch_to := {Group, Topic}}}},
-    UpgradeQoS,
-    Session
-) ->
-    %% Only QoS_1 and QoS_2 messages added `redispatch_to` header
-    %% For QoS 0 message, send it as regular dispatch
-    Deliver = {deliver, emqx_topic:make_shared_record(Group, Topic), Msg},
-    enrich_deliver(ClientInfo, Deliver, UpgradeQoS, Session);
 enrich_deliver(ClientInfo, {deliver, Topic, Msg}, UpgradeQoS, Session) ->
-    SubOpts = ?IMPL(Session):get_subscription(Topic, Session),
+    SubOpts =
+        case Msg of
+            #message{headers = #{shared_record := SharedRecord}} ->
+                ?IMPL(Session):get_subscription(SharedRecord, Session);
+            _ ->
+                ?IMPL(Session):get_subscription(Topic, Session)
+        end,
     enrich_message(ClientInfo, Msg, SubOpts, UpgradeQoS).
 
 enrich_message(

apps/emqx/src/emqx_shared_sub.erl

@@ -141,14 +141,15 @@ record(Group, Topic, SubPid) ->
 dispatch(Group, Topic, Delivery) ->
     dispatch(Group, Topic, Delivery, _FailedSubs = #{}).
 
-dispatch(Group, Topic, Delivery = #delivery{message = Msg}, FailedSubs) ->
+dispatch(Group, Topic, Delivery = #delivery{message = Msg0}, FailedSubs) ->
-    #message{from = ClientId, topic = SourceTopic} = Msg,
+    #message{from = ClientId, topic = SourceTopic} = Msg0,
+    Msg1 = with_shared_record(Msg0, Group, Topic),
     case pick(strategy(Group), ClientId, SourceTopic, Group, Topic, FailedSubs) of
         false ->
             {error, no_subscribers};
         {Type, SubPid} ->
-            Msg1 = with_redispatch_to(Msg, Group, Topic),
+            Msg2 = with_redispatch_to(Msg1, Group, Topic),
-            case do_dispatch(SubPid, Group, Topic, Msg1, Type) of
+            case do_dispatch(SubPid, Group, Topic, Msg2, Type) of
                 ok ->
                     {ok, 1};
                 {error, Reason} ->
@@ -239,6 +240,9 @@ with_redispatch_to(#message{qos = ?QOS_0} = Msg, _Group, _Topic) ->
 with_redispatch_to(Msg, Group, Topic) ->
     emqx_message:set_headers(#{redispatch_to => ?REDISPATCH_TO(Group, Topic)}, Msg).
 
+with_shared_record(Msg, Group, Topic) ->
+    emqx_message:set_headers(#{shared_record => emqx_topic:make_shared_record(Group, Topic)}, Msg).
+
 %% @hidden Redispatch is needed only for the messages with redispatch_to header added.
 is_redispatch_needed(#message{} = Msg) ->
     case get_redispatch_to(Msg) of

apps/emqx/test/emqx_broker_SUITE.erl

@@ -308,7 +308,10 @@ t_shared_subscribe(Config) when is_list(Config) ->
     emqx_broker:safe_publish(emqx_message:make(ct, <<"topic">>, <<"hello">>)),
     ?assert(
         receive
-            {deliver, <<"topic">>, #message{payload = <<"hello">>}} ->
+            {deliver, <<"topic">>, #message{
+                headers = #{shared_record := #share{group = <<"group">>, topic = <<"topic">>}},
+                payload = <<"hello">>
+            }} ->
                 true;
             Msg ->
                 ct:pal("Msg: ~p", [Msg]),