Github user zsxwing commented on the issue:

    https://github.com/apache/spark/pull/14651
  
    The motivation here is, e.g., if the h2o library is in classpath, even if I 
don't use it (such as, run 
`Seq(1).toDS().write.format("parquet").save("foo")`), my code will still fail. 
The improved error message gives the user a better instruction.


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