diff --git a/externals/kyuubi-spark-sql-engine/src/main/scala/org/apache/kyuubi/engine/spark/udf/KDFRegistry.scala b/externals/kyuubi-spark-sql-engine/src/main/scala/org/apache/kyuubi/engine/spark/udf/KDFRegistry.scala
index 537a77117..11900f77a 100644
--- a/externals/kyuubi-spark-sql-engine/src/main/scala/org/apache/kyuubi/engine/spark/udf/KDFRegistry.scala
+++ b/externals/kyuubi-spark-sql-engine/src/main/scala/org/apache/kyuubi/engine/spark/udf/KDFRegistry.scala
@@ -19,6 +19,7 @@ package org.apache.kyuubi.engine.spark.udf
 
 import scala.collection.mutable.ArrayBuffer
 
+import org.apache.spark.SparkEnv
 import org.apache.spark.sql.SparkSession
 import org.apache.spark.sql.expressions.UserDefinedFunction
 import org.apache.spark.sql.functions.udf
@@ -27,9 +28,10 @@ import org.apache.kyuubi.KYUUBI_VERSION
 
 object KDFRegistry {
 
+  @transient
   val registeredFunctions = new ArrayBuffer[KyuubiDefinedFunction]()
 
-  val appName = SparkSession.active.sparkContext.appName
+  val appName = SparkEnv.get.conf.get("spark.app.name")
 
   val kyuubi_version: KyuubiDefinedFunction = create(
     "kyuubi_version",
diff --git a/kyuubi-server/src/test/scala/org/apache/kyuubi/operation/KyuubiOperationYarnClusterSuite.scala b/kyuubi-server/src/test/scala/org/apache/kyuubi/operation/KyuubiOperationYarnClusterSuite.scala
index 122a3dbfa..734406e0f 100644
--- a/kyuubi-server/src/test/scala/org/apache/kyuubi/operation/KyuubiOperationYarnClusterSuite.scala
+++ b/kyuubi-server/src/test/scala/org/apache/kyuubi/operation/KyuubiOperationYarnClusterSuite.scala
@@ -42,4 +42,12 @@ class KyuubiOperationYarnClusterSuite extends WithKyuubiServerOnYarn with JDBCTe
       assert(resultSet.getString("id").startsWith("application_"))
     }
   }
+
+  test("KYUUBI #1263: Kyuubi auxiliary UDF failed on Spark Yarn mode") {
+    withJdbcStatement() { statement =>
+      val resultSet = statement.executeQuery("""SELECT kyuubi_version() as id""")
+      assert(resultSet.next())
+      assert(resultSet.getString("id") === org.apache.kyuubi.KYUUBI_VERSION)
+    }
+  }
 }