Github user rxin commented on a diff in the pull request:
https://github.com/apache/spark/pull/17002#discussion_r102070142
--- Diff: sql/core/src/main/scala/org/apache/spark/sql/SparkSession.scala
---
@@ -95,16 +95,26 @@ class SparkSession private(
/**
* State shared across sessions, including the `SparkContext`, cached
data, listener,
* and a catalog that interacts with external systems.
+ *
+ * This is internal to Spark and there is no guarantee on interface
stability.
+ *
+ * @since 2.2.0
*/
+ @InterfaceStability.Unstable
@transient
- private[sql] lazy val sharedState: SharedState = {
+ lazy val sharedState: SharedState = {
existingSharedState.getOrElse(new SharedState(sparkContext))
}
/**
* State isolated across sessions, including SQL configurations,
temporary tables, registered
* functions, and everything else that accepts a
[[org.apache.spark.sql.internal.SQLConf]].
+ *
+ * This is internal to Spark and there is no guarantee on interface
stability.
+ *
+ * @since 2.2.0
*/
+ @InterfaceStability.Unstable
@transient
private[sql] lazy val sessionState: SessionState = {
--- End diff --
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