From 1edd2f95c244cef0a26a97d65eb80965648ca7cb Mon Sep 17 00:00:00 2001
From: AnyCPU <AnyCPU@users.noreply.github.com>
Date: Fri, 13 Feb 2026 23:40:24 +0200
Subject: [PATCH] Add missing state file close and error logging in
 saveStateSnapshot

---
 internal/server/router.go | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/internal/server/router.go b/internal/server/router.go
index 051f0be8..6cb3b14f 100644
--- a/internal/server/router.go
+++ b/internal/server/router.go
@@ -341,7 +341,7 @@ func (r *Router) installLoadBalancer(name string, slot TargetSlot, lb *LoadBalan
 	return replaced, err
 }
 
-func (r *Router) saveStateSnapshot() error {
+func (r *Router) saveStateSnapshot() (err error) {
 	services := []*Service{}
 	r.withReadLock(func() error {
 		for _, service := range r.services.All() {
@@ -352,8 +352,15 @@ func (r *Router) saveStateSnapshot() error {
 
 	f, err := os.Create(r.statePath)
 	if err != nil {
+		slog.Error("Unable to create state file", "error", err, "path", r.statePath)
 		return err
 	}
+	defer func() {
+		if cerr := f.Close(); cerr != nil {
+			slog.Error("Unable to close state file", "error", cerr, "path", r.statePath)
+			err = errors.Join(err, cerr)
+		}
+	}()
 
 	err = json.NewEncoder(f).Encode(services)
 	if err != nil {