private Node controller(MetadataResponse response) {
                if (response.controller() == null || response.controller().id() == MetadataResponse.NO_CONTROLLER_ID)
                    return null;
                return response.controller();
            }
Fail futures in the given Map which were retried due to exceeding quota. We propagate
the initial error back to the caller if the request timed out.
clients/src/main/java/org/apache/kafka/clients/admin/KafkaAdminClient.java