@Override
                void handleResponse(AbstractResponse abstractResponse) {
                    DescribeConfigsResponse response = (DescribeConfigsResponse) abstractResponse;
                    for (Map.Entry<ConfigResource, DescribeConfigsResponseData.DescribeConfigsResult> entry : response.resultMap().entrySet()) {
                        ConfigResource configResource = entry.getKey();
                        DescribeConfigsResponseData.DescribeConfigsResult describeConfigsResult = entry.getValue();
                        KafkaFutureImpl<Config> future = unified.get(configResource);
                        if (future == null) {
                            if (node != null) {
                                log.warn("The config {} in the response from node {} is not in the request",
                                        configResource, node);
                            } else {
                                log.warn("The config {} in the response from the least loaded broker is not in the request",
                                        configResource);
                            }
                        } else {
                            if (describeConfigsResult.errorCode() != Errors.NONE.code()) {
                                future.completeExceptionally(Errors.forCode(describeConfigsResult.errorCode())
                                        .exception(describeConfigsResult.errorMessage()));
                            } else {
                                future.complete(describeConfigResult(describeConfigsResult));
                            }
                        }
                    }
                    completeUnrealizedFutures(
                        unified.entrySet().stream(),
                        configResource -> "The node response did not contain a result for config resource " + configResource);
                }
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