swuferhong opened a new pull request, #15544:
URL: https://github.com/apache/kafka/pull/15544

     This pr is aims to fix the wrong highWatermark assert equals condition in 
`HighwatermarkPersistenceTest`.  The highWatermark need lower than LEO, but in 
`HighwatermarkPersistenceTest#testHighWatermarkPersistenceSinglePartition`, the 
test not append only data to partition, so `updateHighWatermark()` cannot work, 
the `hw` are always 0.
   
   However, the test don't failed before because of the assert equals condition 
is self judgement which will be always true (equals to 0).
    
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   *Summary of testing strategy (including rationale)
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   tests are expected for any behaviour change and
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   ### Committer Checklist (excluded from commit message)
   - [ ] Verify design and implementation 
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