From 635727452cf1d51ee3efb49d7475195d0622cabf Mon Sep 17 00:00:00 2001
From: Anant Kishor Sharma <anant.kishor-sharma@hpe.com>
Date: Tue, 18 Aug 2026 16:01:29 +0530
Subject: [PATCH] [agent] Use std::_Exit() to avoid EventBase double-drive on
 HwAgent exit

---
 fboss/agent/HwAgentMain.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/fboss/agent/HwAgentMain.cpp b/fboss/agent/HwAgentMain.cpp
index 45776236c5b2f..cc9937cb746cd 100644
--- a/fboss/agent/HwAgentMain.cpp
+++ b/fboss/agent/HwAgentMain.cpp
@@ -36,6 +36,7 @@
 #include "fboss/agent/hw/test/HwTestThriftHandler.h"
 
 #include <chrono>
+#include <cstdlib>
 
 FOLLY_INIT_LOGGING_CONFIG("fboss=DBG2; default:async=true");
 
@@ -155,7 +156,8 @@ void SplitHwAgentSignalHandler::signalReceived(int /*signum*/) noexcept {
     XLOG(INFO) << "[Exit] Delay complete, exiting now";
   }
 
-  exit(0);
+  // _Exit: skip global dtors that re-drive the live EventBase on warmboot exit.
+  std::_Exit(0);
 }
 
 int hwAgentMain(