@Override
            void handleResponse(AbstractResponse abstractResponse) {
                DescribeDelegationTokenResponse response = (DescribeDelegationTokenResponse) abstractResponse;
                if (response.hasError()) {
                    tokensFuture.completeExceptionally(response.error().exception());
                } else {
                    tokensFuture.complete(response.tokens());
                }
            }
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