diff --git a/core/src/main/scala/org/apache/spark/util/Utils.scala b/core/src/main/scala/org/apache/spark/util/Utils.scala
index 926f3a3c114fc..8a349e0227ff6 100644
--- a/core/src/main/scala/org/apache/spark/util/Utils.scala
+++ b/core/src/main/scala/org/apache/spark/util/Utils.scala
@@ -2774,6 +2774,34 @@ private[spark] object Utils extends Logging {
     HashCodes.fromBytes(secretBytes).toString()
   }
 
+  /**
+   * Returns true if and only if the underlying class is a member class.
+   *
+   * Note: jdk8u throws a "Malformed class name" error if a given class is a deeply-nested
+   * inner class (See SPARK-34607 for details). This issue has already been fixed in jdk9+, so
+   * we can remove this helper method safely if we drop the support of jdk8u.
+   */
+  def isMemberClass(cls: Class[_]): Boolean = {
+    try {
+      cls.isMemberClass
+    } catch {
+      case _: InternalError =>
+        // We emulate jdk8u `Class.isMemberClass` below:
+        //   public boolean isMemberClass() {
+        //     return getSimpleBinaryName() != null && !isLocalOrAnonymousClass();
+        //   }
+        // `getSimpleBinaryName()` returns null if a given class is a top-level class,
+        // so we replace it with `cls.getEnclosingClass != null`. The second condition checks
+        // if a given class is not a local or an anonymous class, so we replace it with
+        // `cls.getEnclosingMethod == null` because `cls.getEnclosingMethod()` return a value
+        // only in either case (JVM Spec 4.8.6).
+        //
+        // Note: The newer jdk evaluates `!isLocalOrAnonymousClass()` first,
+        // we reorder the conditions to follow it.
+        cls.getEnclosingMethod == null && cls.getEnclosingClass != null
+    }
+  }
+
   /**
    * Safer than Class obj's getSimpleName which may throw Malformed class name error in scala.
    * This method mimicks scalatest's getSimpleNameOfAnObjectsClass.
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/OuterScopes.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/OuterScopes.scala
index a1f0312bd853c..1a16edc5e68d6 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/OuterScopes.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/OuterScopes.scala
@@ -48,7 +48,7 @@ object OuterScopes {
    * useful for inner class defined in REPL.
    */
   def getOuterScope(innerCls: Class[_]): () => AnyRef = {
-    assert(innerCls.isMemberClass)
+    assert(Utils.isMemberClass(innerCls))
     val outerClassName = innerCls.getDeclaringClass.getName
     val outer = outerScopes.get(outerClassName)
     if (outer == null) {
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/objects/objects.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/objects/objects.scala
index 72a60f0cb5c5f..d29697a6e65d6 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/objects/objects.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/objects/objects.scala
@@ -446,7 +446,7 @@ case class NewInstance(
     // Note that static inner classes (e.g., inner classes within Scala objects) don't need
     // outer pointer registration.
     val needOuterPointer =
-      outerPointer.isEmpty && cls.isMemberClass && !Modifier.isStatic(cls.getModifiers)
+      outerPointer.isEmpty && Utils.isMemberClass(cls) && !Modifier.isStatic(cls.getModifiers)
     childrenResolved && !needOuterPointer
   }
 
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/ExpressionEncoderSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/ExpressionEncoderSuite.scala
index efce0097c12b0..227c31b358108 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/ExpressionEncoderSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/ExpressionEncoderSuite.scala
@@ -233,6 +233,76 @@ class ExpressionEncoderSuite extends CodegenInterpretedPlanTest with AnalysisTes
       "nested Scala class")
   }
 
+  object OuterLevelWithVeryVeryVeryLongClassName1 {
+    object OuterLevelWithVeryVeryVeryLongClassName2 {
+      object OuterLevelWithVeryVeryVeryLongClassName3 {
+        object OuterLevelWithVeryVeryVeryLongClassName4 {
+          object OuterLevelWithVeryVeryVeryLongClassName5 {
+            object OuterLevelWithVeryVeryVeryLongClassName6 {
+              object OuterLevelWithVeryVeryVeryLongClassName7 {
+                object OuterLevelWithVeryVeryVeryLongClassName8 {
+                  object OuterLevelWithVeryVeryVeryLongClassName9 {
+                    object OuterLevelWithVeryVeryVeryLongClassName10 {
+                      object OuterLevelWithVeryVeryVeryLongClassName11 {
+                        object OuterLevelWithVeryVeryVeryLongClassName12 {
+                          object OuterLevelWithVeryVeryVeryLongClassName13 {
+                            object OuterLevelWithVeryVeryVeryLongClassName14 {
+                              object OuterLevelWithVeryVeryVeryLongClassName15 {
+                                object OuterLevelWithVeryVeryVeryLongClassName16 {
+                                  object OuterLevelWithVeryVeryVeryLongClassName17 {
+                                    object OuterLevelWithVeryVeryVeryLongClassName18 {
+                                      object OuterLevelWithVeryVeryVeryLongClassName19 {
+                                        object OuterLevelWithVeryVeryVeryLongClassName20 {
+                                          case class MalformedNameExample(x: Int)
+                                        }}}}}}}}}}}}}}}}}}}}
+
+  {
+    OuterScopes.addOuterScope(
+      OuterLevelWithVeryVeryVeryLongClassName1
+        .OuterLevelWithVeryVeryVeryLongClassName2
+        .OuterLevelWithVeryVeryVeryLongClassName3
+        .OuterLevelWithVeryVeryVeryLongClassName4
+        .OuterLevelWithVeryVeryVeryLongClassName5
+        .OuterLevelWithVeryVeryVeryLongClassName6
+        .OuterLevelWithVeryVeryVeryLongClassName7
+        .OuterLevelWithVeryVeryVeryLongClassName8
+        .OuterLevelWithVeryVeryVeryLongClassName9
+        .OuterLevelWithVeryVeryVeryLongClassName10
+        .OuterLevelWithVeryVeryVeryLongClassName11
+        .OuterLevelWithVeryVeryVeryLongClassName12
+        .OuterLevelWithVeryVeryVeryLongClassName13
+        .OuterLevelWithVeryVeryVeryLongClassName14
+        .OuterLevelWithVeryVeryVeryLongClassName15
+        .OuterLevelWithVeryVeryVeryLongClassName16
+        .OuterLevelWithVeryVeryVeryLongClassName17
+        .OuterLevelWithVeryVeryVeryLongClassName18
+        .OuterLevelWithVeryVeryVeryLongClassName19
+        .OuterLevelWithVeryVeryVeryLongClassName20)
+    checkCompilationError(
+      OuterLevelWithVeryVeryVeryLongClassName1
+        .OuterLevelWithVeryVeryVeryLongClassName2
+        .OuterLevelWithVeryVeryVeryLongClassName3
+        .OuterLevelWithVeryVeryVeryLongClassName4
+        .OuterLevelWithVeryVeryVeryLongClassName5
+        .OuterLevelWithVeryVeryVeryLongClassName6
+        .OuterLevelWithVeryVeryVeryLongClassName7
+        .OuterLevelWithVeryVeryVeryLongClassName8
+        .OuterLevelWithVeryVeryVeryLongClassName9
+        .OuterLevelWithVeryVeryVeryLongClassName10
+        .OuterLevelWithVeryVeryVeryLongClassName11
+        .OuterLevelWithVeryVeryVeryLongClassName12
+        .OuterLevelWithVeryVeryVeryLongClassName13
+        .OuterLevelWithVeryVeryVeryLongClassName14
+        .OuterLevelWithVeryVeryVeryLongClassName15
+        .OuterLevelWithVeryVeryVeryLongClassName16
+        .OuterLevelWithVeryVeryVeryLongClassName17
+        .OuterLevelWithVeryVeryVeryLongClassName18
+        .OuterLevelWithVeryVeryVeryLongClassName19
+        .OuterLevelWithVeryVeryVeryLongClassName20
+        .MalformedNameExample(42),
+      "deeply nested Scala class")
+  }
+
   productTest(PrimitiveData(1, 1, 1, 1, 1, 1, true))
 
   productTest(