mengnankkkk opened a new pull request, #9552:
URL: https://github.com/apache/rocketmq/pull/9552

   …empty/single-message queues #9535
   
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   ### Which Issue(s) This PR Fixes
   
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   When maxOffset <= 1, start from offset 0 to ensure no messages are skipped
    maxOffset = 0: empty queue, start from 0 (no messages to consume)
   maxOffset = 1: single message at offset 0, start from 0 to consume it
   maxOffset > 1: multiple messages, start from maxOffset (last position)
   
   Fixes #9535 
   
   ### Brief Description
   
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   ### How Did You Test This Change?
   Added 8 new test methods to the existing RebalancePushImplTest class to test 
various edge cases of the maxOffset method.
   
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