From 57bf6e5a85ca396f0c64a4bf5416adcd9ee327a6 Mon Sep 17 00:00:00 2001
From: Eduard Rakhmankulov <erixonich@gmail.com>
Date: Fri, 17 Apr 2026 09:02:03 +0300
Subject: [PATCH] IGNITE-28569 possible fix

---
 .../platforms/cpp/ignite/network/detail/win/win_async_client.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/modules/platforms/cpp/ignite/network/detail/win/win_async_client.cpp b/modules/platforms/cpp/ignite/network/detail/win/win_async_client.cpp
index 2c97de60b51..ab800a50537 100644
--- a/modules/platforms/cpp/ignite/network/detail/win/win_async_client.cpp
+++ b/modules/platforms/cpp/ignite/network/detail/win/win_async_client.cpp
@@ -63,6 +63,7 @@ bool win_async_client::shutdown(std::optional<ignite_error> err) {
 }
 
 bool win_async_client::close() {
+    std::unique_lock lock(m_send_mutex);
     if (state::CLOSED == m_state)
         return false;