Github user JoshRosen commented on a diff in the pull request:
https://github.com/apache/spark/pull/3543#discussion_r21658152
--- Diff: sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala ---
@@ -262,7 +263,7 @@ class SQLContext(@transient val sparkContext:
SparkContext)
def createParquetFile[A <: Product : TypeTag](
path: String,
allowExisting: Boolean = true,
- conf: Configuration = new Configuration()): SchemaRDD = {
--- End diff --
> And people are out of luck if they have code that used to work because
they were modifying new blank instances of Configuration, rather than the
now-shared one?
I don't think that users were able to access the old `new Configuration()`
instance; I think that the only code that could have modified this would be the
Parquet code.
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