colin-r-schultz commented on code in PR #45372:
URL: https://github.com/apache/arrow/pull/45372#discussion_r1942123751


##########
cpp/src/arrow/record_batch_test.cc:
##########
@@ -393,6 +399,27 @@ TEST_F(TestRecordBatch, RemoveColumnEmpty) {
   AssertBatchesEqual(*added, *batch1);
 }
 
+TEST_F(TestRecordBatch, ColumnsThreadSafety) {
+  const int length = 10;
+
+  random::RandomArrayGenerator gen(42);
+  std::shared_ptr<ArrayData> array_data = gen.ArrayOf(utf8(), length)->data();
+  auto schema = ::arrow::schema({field("f1", utf8())});
+  auto record_batch = RecordBatch::Make(schema, length, {array_data});
+  std::atomic_bool start_flag{false};
+  std::thread t([record_batch, &start_flag]() {
+    start_flag.store(true);
+    auto columns = record_batch->columns();
+    ASSERT_EQ(columns.size(), 1);

Review Comment:
   That's a great point, thanks for the suggestion. I've revised my test case.



##########
cpp/src/arrow/record_batch_test.cc:
##########
@@ -393,6 +399,27 @@ TEST_F(TestRecordBatch, RemoveColumnEmpty) {
   AssertBatchesEqual(*added, *batch1);
 }
 
+TEST_F(TestRecordBatch, ColumnsThreadSafety) {
+  const int length = 10;
+
+  random::RandomArrayGenerator gen(42);
+  std::shared_ptr<ArrayData> array_data = gen.ArrayOf(utf8(), length)->data();
+  auto schema = ::arrow::schema({field("f1", utf8())});
+  auto record_batch = RecordBatch::Make(schema, length, {array_data});
+  std::atomic_bool start_flag{false};
+  std::thread t([record_batch, &start_flag]() {
+    start_flag.store(true);
+    auto columns = record_batch->columns();
+    ASSERT_EQ(columns.size(), 1);

Review Comment:
   That's a great point, thanks for the suggestion. I've revised the test case.



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