Github user liancheng commented on a diff in the pull request:

    https://github.com/apache/spark/pull/9405#discussion_r44615994
  
    --- Diff: 
sql/core/src/main/scala/org/apache/spark/sql/sources/interfaces.scala ---
    @@ -434,10 +439,7 @@ abstract class HadoopFsRelation 
private[sql](maybePartitionSpec: Option[Partitio
     
               logInfo(s"Listing $qualified on driver")
               Try(fs.listStatus(qualified)).getOrElse(Array.empty)
    -        }.filterNot { status =>
    -          val name = status.getPath.getName
    -          name.toLowerCase == "_temporary" || name.startsWith(".")
    -        }
    +        }.filterNot(fileStatusFilter)
    --- End diff --
    
    I mean this disables caching `FileStatus`es of part-files, and this does 
influence `ParquetInputFormat.listStatus()`. I believe the reason why no test 
case was broken is that currently `ParquetInputFormat` only calls 
`listStatus()` for reading footers. But this is completely an implementation 
detail within Parquet itself and shouldn't be viewed as a stable assumption.


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