arunmahadevan commented on a change in pull request #23912: [SPARK-21029][SS] 
StreamingQuery should be stopped when the SparkSession is stopped
URL: https://github.com/apache/spark/pull/23912#discussion_r261439693
 
 

 ##########
 File path: sql/core/src/main/scala/org/apache/spark/sql/SparkSession.scala
 ##########
 @@ -723,6 +725,11 @@ class SparkSession private(
    * @since 2.0.0
    */
   def stop(): Unit = {
+    if (!stopped.compareAndSet(false, true)) {
+      logInfo("SparkSession already stopped.")
+      return
 
 Review comment:
   Changed it.

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