meetjunsu commented on pull request #16122:
URL: https://github.com/apache/flink/pull/16122#issuecomment-861234708


   @JingsongLi  The code is just to avoid continuing to create the reader after 
the limit condition has been reached. For the orc format, creating a reader 
requires pre-reading a stripe data, which is a more expensive operation, so 
this change can bring better performance to the orc , If you want to add cases, 
we need to observe performance indicators such as the number of open files or 
disk io
   


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