public class Listener {

    List<String> buffer = new ArrayList<>();
    Instant time = Instant.now();

    @KafkaListener(..., batch="true", concurrency="1")
    public void listen(@Payload List<String> data, Acknowledgment ack) {
        buffer.addAll(data);
        Instant now = Instant.now();
        if (Duration.between(time, now).getSeconds() > 10 || buffer.size() > 10000) {
            process(buffer);
            buffer.clear();
            time = now;
            ack.acknowledge();
        }
    }

    private void process(List<String> messages) {
        // send to ClickHouse
    }

}