blem.
            One cannot tell which resources are used by the asynchronous sink because
            it works in a dedicated thread and uses buffered log records. There is
            no general solution for this issue. Users are advised to either avoid
            dynamic module unloading during the application's work time, or to avoid
            asynchronous logging. As an additional way to cope with the problem,
            one may try to shutdown all asynchronous sinks before unloading any modules,
