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Currently time based log rolling is based on the creating time of the log segment. With this KIP, the time based rolling would be changed to only based on the message timestamp of . More specifically, if the first message in the log segment . has a timestamp, A new log segment will be rolled out if current time timestamp in the message about to be appended is greater than the timestamp of the first message in the segment + log.roll.ms. When message.timestamp.type=CreateTime, user should set max.message.time.difference.ms appropriately together with log.roll.ms to avoid frequent log segment roll out.

During the migration phase, if the first message in a segment does not have a timestamp, the log rolling will still be based on the (current time - create time of the segment).

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