Github user HyukjinKwon commented on a diff in the pull request:
https://github.com/apache/spark/pull/22295#discussion_r224983583
--- Diff: python/pyspark/sql/session.py ---
@@ -231,6 +231,7 @@ def __init__(self, sparkContext, jsparkSession=None):
or SparkSession._instantiatedSession._sc._jsc is None:
SparkSession._instantiatedSession = self
self._jvm.SparkSession.setDefaultSession(self._jsparkSession)
+ self._jvm.SparkSession.setActiveSession(self._jsparkSession)
--- End diff --
Oh, okay. I had to be explicit. I meant:
```scala
scala> import org.apache.spark.sql.SparkSession
import org.apache.spark.sql.SparkSession
scala> SparkSession.getActiveSession
res0: Option[org.apache.spark.sql.SparkSession] =
Some(org.apache.spark.sql.SparkSession@3ef4a8fb)
scala> val session1 = spark
session1: org.apache.spark.sql.SparkSession =
org.apache.spark.sql.SparkSession@3ef4a8fb
scala> val session2 = spark.newSession()
session2: org.apache.spark.sql.SparkSession =
org.apache.spark.sql.SparkSession@4b74a4d
scala> SparkSession.getActiveSession
res1: Option[org.apache.spark.sql.SparkSession] =
Some(org.apache.spark.sql.SparkSession@3ef4a8fb)
scala> session2.createDataFrame(Seq(Tuple1(1)))
res2: org.apache.spark.sql.DataFrame = [_1: int]
scala> SparkSession.getActiveSession
res3: Option[org.apache.spark.sql.SparkSession] =
Some(org.apache.spark.sql.SparkSession@4b74a4d)
```
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