steveloughran commented on pull request #2584:
URL: https://github.com/apache/hadoop/pull/2584#issuecomment-761561997


   1. we've already shipped that
   2. it's in createFile too
   
   imagine in future you want to do something more than a hint. Case in point: 
the SQL API in AWS S3. there's no way an app could issue SQL commands which 
include transforming the response without knowing whether or not they are 
processed. hence `must()`. 
   
   how about i clarify this in the docs and recommend use of opt() except in 
such special cases?
   


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