[GitHub] [spark] uncleGen commented on a change in pull request #26225: [SPARK-29568][SS] Stop existing running streams when a new stream is launched

[GitBox <gi...@apache.org>]

uncleGen commented on a change in pull request #26225: [SPARK-29568][SS] Stop existing running streams when a new stream is launched
URL: https://github.com/apache/spark/pull/26225#discussion_r338450213
 
 

 ##########
 File path: sql/core/src/main/scala/org/apache/spark/sql/streaming/StreamingQueryManager.scala
 ##########
 @@ -355,11 +355,22 @@ class StreamingQueryManager private[sql] (sparkSession: SparkSession) extends Lo
       // Make sure no other query with same id is active across all sessions
       val activeOption =
         Option(sparkSession.sharedState.activeStreamingQueries.putIfAbsent(query.id, this))
-      if (activeOption.isDefined || activeQueries.values.exists(_.id == query.id)) {
+
+      val streamAlreadyActive =
+        activeOption.isDefined || activeQueries.values.exists(_.id == query.id)
+      val turnOffOldStream =
+        sparkSession.sessionState.conf.getConf(SQLConf.STOP_RUNNING_DUPLICATE_STREAM)
+      if (streamAlreadyActive && turnOffOldStream) {
+        val queryManager = activeOption.getOrElse(this)
+        logInfo(s"Stopping existing streaming query [id=${query.id}], as a new run is being " +
 
 Review comment:
   nit: whether giving a warning is better?

----------------------------------------------------------------
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
 
For queries about this service, please contact Infrastructure at:
users@infra.apache.org


With regards,
Apache Git Services

---------------------------------------------------------------------
To unsubscribe, e-mail: reviews-unsubscribe@spark.apache.org
For additional commands, e-mail: reviews-help@spark.apache.org