Consumer Offset not commited when using assign() to consume select partitions only

[zoltan-fedor]

When consuming from select partitions only, the offset is not being committed, but stays unchanged.

        kafka_consumer = KafkaConsumer(
            group_id=settings['kafka_group_id'],
            bootstrap_servers=settings['kafka_servers']
        )

        kafka_consumer.assign([
                TopicPartition(settings['topic'],2),
                TopicPartition(settings['topic'],4),
             ])

Checking the consumer offset of partition 2 and 4 shows now change, even after consuming 25M records.

[dpkp]

I believe this is a dup of #626

[zoltan-fedor]

Thanks, that helps, so at least I can work around it by using autocommit False