Hi Gaurav, You have a valid concern regarding the proposed default value for log.message.timestamp.after.max.ms being only 1 hour.
We can keep this as Long.MAX_VALUE for the first phase implementation of this KIP and change the default value to 1 hour in future iterations. In the meantime, users can override this configuration and protect against messages with future timestamps. I have updated the KIP to reflect this change. Thanks, Mehari
