From 0ceff4d2da7720820e35c9af33d3e43c44c351d9 Mon Sep 17 00:00:00 2001
From: Yaron Gvili <rtpsw@hotmail.com>
Date: Sun, 4 Jun 2023 17:16:51 -0400
Subject: [PATCH] GH-35868: [C++] Occasional TSAN failure on
 asof-join-node-test

---
 cpp/src/arrow/acero/asof_join_node.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/cpp/src/arrow/acero/asof_join_node.cc b/cpp/src/arrow/acero/asof_join_node.cc
index b92339b951bcf..f8dee5aac8815 100644
--- a/cpp/src/arrow/acero/asof_join_node.cc
+++ b/cpp/src/arrow/acero/asof_join_node.cc
@@ -529,7 +529,7 @@ class KeyHasher {
   size_t index_;
   std::vector<col_index_t> indices_;
   std::vector<KeyColumnMetadata> metadata_;
-  const RecordBatch* batch_;
+  std::atomic<const RecordBatch*> batch_;
   std::vector<HashType> hashes_;
   LightContext ctx_;
   std::vector<KeyColumnArray> column_arrays_;