I need a way for Kafka consumer to commit a particular message

Question

Let's imagine a stream of messages in a kafka partition.

1, 2, 3, 4, 5

Is there a way for a consumer to commit one message(let's say 2), so that if that particular consumer started reading messages from the beginning all over again, it would only consume uncommitted messages?

1, 3, 4, 5

Answer 1

I'm not sure I understand the use case, but you could use a compacted topic

Say you send these messages

(1, 1)
(2, 2)
(3, 3) 
(4, 4)
(5, 5)

And you don't want to see value 2 anymore, then you send one more record

(2, null)

After compaction, all keys with 2 get removed

Answer 2

No. Apache Kafka doesn't support single record acknowledgement AFAIK. So, when a message gets acknowleged (say 3), all prevoiusly seen messages are considered read.

You can process your topic with some filter processor which will drop messages by some condition. The output topic of this processor could be consumed by your app then.