Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/18172#discussion_r119530605
--- Diff: sql/core/src/main/scala/org/apache/spark/sql/SparkSession.scala
---
@@ -899,21 +899,15 @@ object SparkSession {
// No active nor global default session. Create a new one.
val sparkContext = userSuppliedContext.getOrElse {
+ val sparkConf = new SparkConf()
+ SparkContext.getOrCreate(sparkConf)
--- End diff --
in order to remove
https://github.com/apache/spark/pull/18172/files#diff-d91c284798f1c98bf03a31855e26d71cL938
, here I change the behavior to also setting `options` to `sc.conf` even if
the `sparkContext` is supplied by users. This change is safe as
`SparkSession.Builder.sparkContext` is private, and I checked all the callers
to confirm that it's ok to do so.
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