cxzl25 commented on code in PR #2435:
URL: https://github.com/apache/incubator-kyuubi/pull/2435#discussion_r855770571
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externals/kyuubi-spark-sql-engine/src/main/scala/org/apache/kyuubi/engine/spark/session/SparkSQLSessionManager.scala:
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@@ -50,6 +53,38 @@ class SparkSQLSessionManager private (name: String, spark:
SparkSession)
val operationManager = new SparkSQLOperationManager()
private lazy val singleSparkSession = conf.get(ENGINE_SINGLE_SPARK_SESSION)
+ private lazy val shareLevel =
ShareLevel.withName(conf.get(ENGINE_SHARE_LEVEL))
+
+ private lazy val userIsolatedSparkSession =
conf.get(ENGINE_USER_ISOLATED_SPARK_SESSION)
+ private lazy val userIsolatedSparkSessionCache = new
ConcurrentHashMap[String, SparkSession]()
+
+ private def getOrNewSparkSession(user: String): SparkSession = {
+ if (singleSparkSession) {
+ spark
+ } else {
+ shareLevel match {
+ // it's unnecessary to create a new spark session in connection share
level
+ // since the session is only one
+ case CONNECTION => spark
+ case USER => newSparkSession(spark)
+ case GROUP | SERVER if userIsolatedSparkSession =>
newSparkSession(spark)
+ case GROUP | SERVER =>
+ if (userIsolatedSparkSessionCache.containsKey(user)) {
+ userIsolatedSparkSessionCache.get(user)
+ } else {
+ val newSession = newSparkSession(spark)
+ userIsolatedSparkSessionCache.put(user, newSession)
Review Comment:
If synchronization is not used here, is it possible for different sessions
of the same user to create `SparkSession` at the same time?
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