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https://issues.apache.org/jira/browse/HUDI-8654?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17910744#comment-17910744
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Y Ethan Guo commented on HUDI-8654:
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We'll go with Design Option 1, and such base instant time is an important piece
of metadata.
> Support correct merging results with record positions in log blocks generated
> during pending compaction
> -------------------------------------------------------------------------------------------------------
>
> Key: HUDI-8654
> URL: https://issues.apache.org/jira/browse/HUDI-8654
> Project: Apache Hudi
> Issue Type: Sub-task
> Reporter: Y Ethan Guo
> Priority: Blocker
> Fix For: 1.0.1
>
> Original Estimate: 20h
> Remaining Estimate: 20h
>
> When there is a pending compaction, the new base files to be generated by
> compaction is not available during this transaction. Given the log files in
> MOR from this transaction can be attached to the base file generated by the
> compaction in the latest file slice, the accurate record positions may not be
> derived. However, the log files written in later delta commits after
> completed compaction have accurate positions.
> Similarly, for NBCC, the compaction can be schedule during an inflight
> deltacommit, and in this case the log file generated by the inflight
> deltacommit is associated with the new base file from the compaction, which
> may have different positions because of deletes.
> We need to make sure that the file group reader with position-based merging
> generates the correct results in such mix of log blocks.
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