pitrou commented on issue #40068:
URL: https://github.com/apache/arrow/issues/40068#issuecomment-1944256761

   `ScanBatchesAsync` is only called from `FragmentToBatches`, which in turn 
can only be called from a "scan" node.
   
   One possible explanation would be if `Dataset::GetFragments` returns the 
same fragment instance twice. How did you create your dataset?


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