rd_kafka_commit with NULL offsets

[ydsun90]

I would like to know what offsets the rd_kafka_commit will commit if offsets is NULL. The librdkafka API says if offsets is NULL the current partition assignment will be used. Does current partition assignment refer to latest offsets of all partitions? When offsets is NULL, does rd_kafka_commit guarantee to commit the latest offsets for all partitions?

Thanks!

[ydsun90]

Actually rd_kafka_commit() without offsets commits the next positions to be read.