@Mayank , i am working on manage offline flows and pushed 20k record with this table config with “bucketTimePeriod”: “1h” and “bufferTimePeriod”: “4h” . ingesting 1 hour late data into realtime segment with 10k records. It gives error like

This means:

// If last completed segment is being used, make sure that segment crosses over end of window.
          // In the absence of this check, CONSUMING segments could contain some portion of the window. That data would be skipped forever.

Correct. Some more explanation about that behavior here