jtao15 opened a new pull request, #8639:
URL: https://github.com/apache/pinot/pull/8639

   This pr enhance current startReplaceSegment api to cover the following case:
   
   Initial state:
   ```
   lineageEntry1: { segmentsFrom: [], segmentsTo: [s1, s2], status: IN_PROGRESS}
   ```
   Restart the protocol with the same segmentsTo will go through and revert 
lineageEntry1:
   
   ```
   lineageEntry1: { segmentsFrom: [], segmentsTo: [s1, s2], status: REVERTED}
   lineageEntry2: { segmentsFrom: [], segmentsTo: [s1, s2], status: IN_PROGRESS}
   ```
   Note:
   The segment deletion in startReplaceSegment api is async, the client side 
should wait till the clean up is finished before uploading the new segments.
   


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