From 3c550b7654e36a430b23396f3e26237fbbed80b7 Mon Sep 17 00:00:00 2001
From: Terry Wang <zjuwangg@foxmail.com>
Date: Fri, 13 Dec 2024 17:06:11 +0800
Subject: [PATCH] fix ut error

---
 .../execution/unsafe/UnsafeColumnarBuildSideRelation.scala   | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/backends-velox/src/main/scala/org/apache/spark/sql/execution/unsafe/UnsafeColumnarBuildSideRelation.scala b/backends-velox/src/main/scala/org/apache/spark/sql/execution/unsafe/UnsafeColumnarBuildSideRelation.scala
index d18041fc983a..7d971ae915d0 100644
--- a/backends-velox/src/main/scala/org/apache/spark/sql/execution/unsafe/UnsafeColumnarBuildSideRelation.scala
+++ b/backends-velox/src/main/scala/org/apache/spark/sql/execution/unsafe/UnsafeColumnarBuildSideRelation.scala
@@ -63,6 +63,11 @@ case class UnsafeColumnarBuildSideRelation(
   with Logging
   with KryoSerializable {
 
+  // Needed for serialization
+  def this() = {
+    this(null, null, null)
+  }
+
   def this(output: Seq[Attribute], bytesBufferArray: Array[Array[Byte]], mode: BroadcastMode) = {
     // only used in driver side when broadcast the whole batches
     this(