Return immediately for leader health checks on empty vhosts

Author: Ayanda-D

deps/rabbit/src/rabbit_quorum_queue.erl

@@ -2196,6 +2196,7 @@ run_leader_health_check(ClusterName, QResource, HealthCheckRef, From) ->
     end,
     ok.
 
+wait_for_leader_health_checks(_Ref, 0, UnhealthyAcc = []) -> UnhealthyAcc;
 wait_for_leader_health_checks(Ref, N, UnhealthyAcc) ->
     receive
         {ok, Ref, _QResource} when N == 1 ->

deps/rabbit/test/quorum_queue_SUITE.erl

@@ -4153,6 +4153,14 @@ leader_health_check(Config) ->
     set_up_vhost(Config, VHost1),
     set_up_vhost(Config, VHost2),
 
+    %% check empty vhost
+    ?assertEqual([],
+        rabbit_ct_broker_helpers:rpc(Config, 0, rabbit_quorum_queue, leader_health_check,
+            [<<".*">>, VHost1])),
+    ?assertEqual([],
+        rabbit_ct_broker_helpers:rpc(Config, 0, rabbit_quorum_queue, leader_health_check,
+            [<<".*">>, global])),
+
     Conn1 = rabbit_ct_client_helpers:open_unmanaged_connection(Config, 0, VHost1),
     {ok, Ch1} = amqp_connection:open_channel(Conn1),