Merge pull request #11589 from rabbitmq/mergify/bp/v3.13.x/pr-11587

Add logging for when hitting vhost_max and component limits (backport #11587)

Author: michaelklishin

deps/rabbit/src/rabbit_runtime_parameters.erl

@@ -165,7 +165,11 @@ is_within_limit(Component) ->
     Limit = proplists:get_value(Component, Limits, -1),
     case Limit < 0 orelse count_component(Component) < Limit of
        true -> ok;
-       false -> {errors, [{"component ~ts is limited to ~tp per node", [Component, Limit]}]}
+       false ->
+            ErrorMsg = "Limit reached: component ~ts is limited to ~tp per node",
+            ErrorArgs = [Component, Limit],
+            rabbit_log:error(ErrorMsg, ErrorArgs),
+            {errors, [{"component ~ts is limited to ~tp per node", [Component, Limit]}]}
     end.
 
 count_component(Component) -> length(list_component(Component)).

deps/rabbit/src/rabbit_vhost.erl

@@ -377,6 +377,7 @@ is_over_vhost_limit(Name, Limit) when is_integer(Limit) ->
             ErrorMsg = rabbit_misc:format("cannot create vhost '~ts': "
                                           "vhost limit of ~tp is reached",
                                           [Name, Limit]),
+            rabbit_log:error(ErrorMsg),
             exit({vhost_limit_exceeded, ErrorMsg})
     end.