cheeeee commented on PR #24072:
URL: https://github.com/apache/kafka/pull/24072#issuecomment-6580190727

   @junrao, could you take a look when you have time? On a compacted topic
   written by transactional producers, the cleaner can ignore a committed
   tombstone, and **the deleted key comes back with its old value after
   compaction**.
   
   The change only affects which aborted transactions seed the offset map
   of a cleaning pass: it uses the same lower bound as a read_committed
   fetch (`lastOffset() >= start`). `cleanSegments` and the transaction
   index rebuild are unchanged. I don't see other second-order effects.
   
   I'd appreciate your view.
   
   Thank you!


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