From e7d9ea53df7292ec7a0016778d9679537f7ffd7e Mon Sep 17 00:00:00 2001
From: Antoine Pitrou <antoine@python.org>
Date: Thu, 12 Sep 2024 18:03:20 +0200
Subject: [PATCH] EXPERIMENT: GH-44071: [C++] Leak S3 structures if
 finalization happens too late

---
 cpp/src/arrow/filesystem/s3fs.cc | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/cpp/src/arrow/filesystem/s3fs.cc b/cpp/src/arrow/filesystem/s3fs.cc
index 96c771aeb61b8..ac373a69e7cd6 100644
--- a/cpp/src/arrow/filesystem/s3fs.cc
+++ b/cpp/src/arrow/filesystem/s3fs.cc
@@ -3389,6 +3389,9 @@ struct AwsInstance {
         ARROW_LOG(WARNING)
             << " arrow::fs::FinalizeS3 was not called even though S3 was initialized.  "
                "This could lead to a segmentation fault at exit";
+        auto leaked_ptr = new std::shared_ptr<S3ClientFinalizer>(GetClientFinalizer());
+        ARROW_UNUSED(leaked_ptr);
+        return;
       }
       GetClientFinalizer()->Finalize();
 #ifdef ARROW_S3_HAS_S3CLIENT_CONFIGURATION