fix: increment dropped message counter when bridge is unhealthy

Fixes https://emqx.atlassian.net/browse/EMQX-10767

apps/emqx_resource/src/emqx_resource.erl

@@ -281,8 +281,10 @@ query(ResId, Request, Opts) ->
         {ok, _Group, #{query_mode := QM, error := Error}} ->
             case {QM, Error} of
                 {_, unhealthy_target} ->
+                    emqx_resource_metrics:dropped_resource_stopped_inc(ResId),
                     ?RESOURCE_ERROR(unhealthy_target, "unhealthy target");
                 {_, {unhealthy_target, _Message}} ->
+                    emqx_resource_metrics:dropped_resource_stopped_inc(ResId),
                     ?RESOURCE_ERROR(unhealthy_target, "unhealthy target");
                 {simple_async, _} ->
                     %% TODO(5.1.1): pass Resource instead of ResId to simple APIs

apps/emqx_resource/test/emqx_resource_SUITE.erl

@@ -899,6 +899,29 @@ t_healthy(_) ->
         end
     ).
 
+t_unhealthy_target(_) ->
+    HealthCheckError = {unhealthy_target, "some message"},
+    ?assertMatch(
+        {ok, _},
+        emqx_resource:create_local(
+            ?ID,
+            ?DEFAULT_RESOURCE_GROUP,
+            ?TEST_RESOURCE,
+            #{name => test_resource, health_check_error => {msg, HealthCheckError}}
+        )
+    ),
+    ?assertEqual(
+        {ok, disconnected},
+        emqx_resource:health_check(?ID)
+    ),
+    ?assertMatch(
+        {ok, _Group, #{error := HealthCheckError}},
+        emqx_resource_manager:lookup(?ID)
+    ),
+    %% messages are dropped when bridge is unhealthy
+    emqx_resource:query(?ID, message),
+    ?assertEqual(1, emqx_resource_metrics:dropped_resource_stopped_get(?ID)).
+
 t_stop_start(_) ->
     ?check_trace(
         begin

changes/ce/fix-11534.en.md

@@ -0,0 +1 @@
+Fixed increment on data bridge statistics when bridge is unhealthy. Now, messages sent to unhealthy bridges are being counted as dropped messages.