From 31cd5f67b6a5107cc75d0911e9c16279e45630eb Mon Sep 17 00:00:00 2001
From: yiguolei <guolei@selectdb.com>
Date: Fri, 20 Jun 2025 14:07:45 +0800
Subject: [PATCH] [bugfix](memleak) fix memleak in arrow input stream (#51929)
 (#51992)

---
 be/src/vec/exec/format/arrow/arrow_pip_input_stream.cpp | 2 +-
 be/src/vec/exec/format/arrow/arrow_pip_input_stream.h   | 3 ++-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/be/src/vec/exec/format/arrow/arrow_pip_input_stream.cpp b/be/src/vec/exec/format/arrow/arrow_pip_input_stream.cpp
index 7bc32c7ab4bb91..1c4462befcc53b 100644
--- a/be/src/vec/exec/format/arrow/arrow_pip_input_stream.cpp
+++ b/be/src/vec/exec/format/arrow/arrow_pip_input_stream.cpp
@@ -32,7 +32,7 @@
 namespace doris::vectorized {
 
 ArrowPipInputStream::ArrowPipInputStream(io::FileReaderSPtr file_reader)
-        : _file_reader(file_reader), _pos(0), _begin(true), _read_buf(new uint8_t[4]) {
+        : _file_reader(file_reader), _pos(0), _begin(true) {
     set_mode(arrow::io::FileMode::READ);
 }
 
diff --git a/be/src/vec/exec/format/arrow/arrow_pip_input_stream.h b/be/src/vec/exec/format/arrow/arrow_pip_input_stream.h
index fef4cf10903b4c..61276ab190534a 100644
--- a/be/src/vec/exec/format/arrow/arrow_pip_input_stream.h
+++ b/be/src/vec/exec/format/arrow/arrow_pip_input_stream.h
@@ -59,7 +59,8 @@ class ArrowPipInputStream : public arrow::io::InputStream {
     io::FileReaderSPtr _file_reader;
     int64_t _pos;
     bool _begin;
-    uint8_t* _read_buf;
+    // The read buf is very small, so use stack memory directly.
+    uint8_t _read_buf[4];
 };
 
 } // namespace vectorized