Management UI creates classic queue instead of virtual host default queue type in some circumstances about rabbitmq-server

[SignalWhisperer]

Sorry, I forgot to mention this was identified on RabbitMQ 3.13.0 and repeated on 3.13.1.

[SimonUnge]

I would say its intentional:

    case vhost:get_metadata(V) of
        #{default_queue_type := DefaultQueueType}
          when is_binary(DefaultQueueType) andalso
               not HasQTypeArg ->
            Type = rabbit_queue_type:discover(DefaultQueueType),
            IsPermitted = is_queue_args_combination_permitted(
                            Durable, Exclusive),
            IsCompatible = rabbit_queue_type:is_compatible(
                             Type, Durable, Exclusive, AutoDelete),
            case IsPermitted andalso IsCompatible of
                true ->
                    %% patch up declare arguments with x-queue-type if there                                                                                                                                                                                 
                    %% is a vhost default set the queue is durable and not exclusive                                                                                                                                                                         
                    %% and there is no queue type argument                                                                                                                                                                                                   
                    %% present                                                                                                                                                                                                                               
                    rabbit_misc:set_table_value(Args0,
                                                <<"x-queue-type">>,
                                                longstr,
                                                DefaultQueueType);
                false ->
                    Args0
            end;
...

The alternative would be to always patch the args and later fail.