From be494053a0e10a006bdee003b7e61384d723884e Mon Sep 17 00:00:00 2001
From: Paddy Xu <xupaddy@gmail.com>
Date: Thu, 10 Oct 2024 13:27:20 +0200
Subject: [PATCH] why so slow try 2

---
 .../org/apache/spark/sql/artifact/ArtifactManager.scala      | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/artifact/ArtifactManager.scala b/sql/core/src/main/scala/org/apache/spark/sql/artifact/ArtifactManager.scala
index 4f64005aa3f12..e80ad1404d3ca 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/artifact/ArtifactManager.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/artifact/ArtifactManager.scala
@@ -36,7 +36,7 @@ import org.apache.spark.sql.{Artifact, SparkSession}
 import org.apache.spark.sql.internal.SQLConf
 import org.apache.spark.sql.util.ArtifactUtils
 import org.apache.spark.storage.{BlockManager, CacheId, StorageLevel}
-import org.apache.spark.util.{ChildFirstURLClassLoader, JoinClassLoader, StubClassLoader, Utils}
+import org.apache.spark.util.{ChildFirstURLClassLoader, StubClassLoader, Utils}
 
 /**
  * This class handles the storage of artifacts as well as preparing the artifacts for use.
@@ -281,8 +281,7 @@ class ArtifactManager(session: SparkSession) extends Logging {
     val urls = getAddedJars :+ classDir.toUri.toURL
     val prefixes = SparkEnv.get.conf.get(CONNECT_SCALA_UDF_STUB_PREFIXES)
     val userClasspathFirst = SparkEnv.get.conf.get(EXECUTOR_USER_CLASS_PATH_FIRST)
-    val fallbackClassLoader = // jarClassLoader -> contextClassLoader
-      new JoinClassLoader(session.sharedState.jarClassLoader, Utils.getContextOrSparkClassLoader)
+    val fallbackClassLoader = Utils.getContextOrSparkClassLoader
     val loader = if (prefixes.nonEmpty) {
       // Two things you need to know about classloader for all of this to make sense:
       // 1. A classloader needs to be able to fully define a class.