kafka 没有提交偏移量为什么还消费不到消息

我设置了手动提交偏移量，并且没有提交，但是为什么拉取不到消息，只能重启应用，或者重新加入group的时候才消费的到。

 Consumer<String, String> consumer = new KafkaConsumer<String, String>(properties);
        consumer.subscribe(Collections.singleton(topic));
        ConsumerRecords<String, String> records = null;
        while (true) {
            records = consumer.poll(Duration.ofMillis(8100));
            logger.info("size {}",records.count());

            records.forEach(record -> {
                boolean success = true;
                try {
                    OrderAction orderAction = processor.processor(new MQContent(record.value()));
                    if (orderAction == OrderAction.Suspend) {
                        success = false;
                    }
                } catch (Exception e) {
                    success = false;
                }
                if (success) {
                    //手动提交offset
                    TopicPartition topicPartition = new TopicPartition(record.topic(), record.partition());
                    consumer.commitSync();
                }

            });
        }

    }