From 34cff4af7db1365bba6decc647ccfb6bf1b21afd Mon Sep 17 00:00:00 2001
From: Matthew Holt <mholt@users.noreply.github.com>
Date: Tue, 31 Dec 2024 13:08:58 -0700
Subject: [PATCH] core: Only initiate exit once (should fix #6707)

---
 caddy.go | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/caddy.go b/caddy.go
index b3e8889fa..758b0b2f6 100644
--- a/caddy.go
+++ b/caddy.go
@@ -725,8 +725,10 @@ func Validate(cfg *Config) error {
 // Errors are logged along the way, and an appropriate exit
 // code is emitted.
 func exitProcess(ctx context.Context, logger *zap.Logger) {
-	// let the rest of the program know we're quitting
-	atomic.StoreInt32(exiting, 1)
+	// let the rest of the program know we're quitting; only do it once
+	if !atomic.CompareAndSwapInt32(exiting, 0, 1) {
+		return
+	}
 
 	// give the OS or service/process manager our 2 weeks' notice: we quit
 	if err := notify.Stopping(); err != nil {