How to start the KafkaItemReader from the offset of before run?

[vishnu2497]

Bug description
While using KafkaItemReader to read the data from Kafka it always starts from 0th offset,if the previously commited offset is 1000 but it is starting from 0 always

Environment
Springboot-2.3.4.RELEASE
SpringBatch-2.3.4.RELEASE
java -Amazon coretto 11

Steps to reproduce
keep this property in kafka itemreader and try to consume two times

KafkaItemReader<String, Member> memberKafkaItemReader() {
Properties props = new Properties();
props.put(JsonSerializer.ADD_TYPE_INFO_HEADERS, false);
props.putAll(this.memberProperties.buildConsumerProperties());
props.put(ConsumerConfig.GROUP_ID_CONFIG, appProperties.MEMBER_GROUP_ID);
props.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG, appProperties.BOOTSTRAP_SERVERS_CONFIG);
props.put(ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG, StringDeserializer.class);
props.put(ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG, JsonDeserializer.class);
props.put(JsonDeserializer.VALUE_DEFAULT_TYPE, "com.sample.consumer.test");
props.put(ConsumerConfig.MAX_POLL_RECORDS_CONFIG, "100");
props.put(ConsumerConfig.AUTO_OFFSET_RESET_CONFIG, "earliest");
props.put(ConsumerConfig.ENABLE_AUTO_COMMIT_CONFIG, "true");
props.put("auto.commit.interval.ms","500");

    return new KafkaItemReaderBuilder<String, Member>()
            .partitions(0)
            .consumerProperties(props)
            .name("test-reader")
            .saveState(true)
            .topic(appProperties.MEMBER_CONSUME_TOPIC)
            .build();

Expected behavior

In first Run it has to consume from offset 0
in second run it has to continue from the last run offset.

problem
But every time it is starting from the 0th offset

[fmbenhassine]

This was addressed in #737 and released in v4.3.0 (See KafkaItemReaderBuilder#partitionOffsets).