Jackie-Jiang opened a new pull request #4338: Only allow the first CONSUMING segment for the real-time table routing URL: https://github.com/apache/incubator-pinot/pull/4338 We only allow the first CONSUMING segment (segment with instances in CONSUMING state) for the following reasons: - We cannot query two CONSUMING segment because the first CONSUMING segment might contain records that overlapped with the records in the next segment. - If the instance states for a segment is partial ONLINE and partial CONSUMING, we don't want to only query the ONLINE instances as that can potentially cause hotspot instance. - It is possible that the latest CONSUMING segment is not allowed, but it should be only for a short period of time. The latest CONSUMING segment will be allowed once the older CONSUMING segment becomes ONLINE.
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