@Override
    public Map<String, List<PartitionInfo>> listTopics(Duration timeout) {
        acquireAndEnsureOpen();
        try {
            return topicMetadataFetcher.getAllTopicMetadata(time.timer(timeout));
        } finally {
            release();
        }
    }
@throws KafkaException if the rebalance callback throws exception
clients/src/main/java/org/apache/kafka/clients/consumer/internals/ClassicKafkaConsumer.java