kafka手动提交，丢失数据

Properties props = new Properties();
props.put("bootstrap.servers", "localhost:9092");
props.put("group.id", "test");
// props.put("enable.auto.commit", "true");
props.put("enable.auto.commit", "false");
props.put("auto.commit.interval.ms", "1000");
props.put("max.poll.records", "10");
props.put("key.deserializer", "org.apache.kafka.common.serialization.StringDeserializer");
props.put("value.deserializer", "org.apache.kafka.common.serialization.StringDeserializer");
KafkaConsumer<String, String> consumer = new KafkaConsumer<>(props);
consumer.subscribe(Arrays.asList("test"));

    logger.info("topic订阅成功");
    while (true) {
        ConsumerRecords<String, String> records = consumer.poll(1000);
        logger.info("拉取条数："+ records.count());
        try {
            for (ConsumerRecord<String, String> record : records){
                logger.info("offset = "+record.offset()+", key = "+record.key()+", value ="+record.value());

// consumer.commitSync();在这提交的化会有丢失数据的风险，例如只消费了一条，然后就挂机了，机器在上线的话后面的也消费不到
}
} catch (Exception e) {
e.printStackTrace();
}finally {
//正确提交，为拉取的一批数据处理完后，一次性提交
consumer.commitSync();
}

    }