From e1b958284eb27a7d54f57ebcbb0c685407b09f33 Mon Sep 17 00:00:00 2001
From: Simon Frei <freisim93@gmail.com>
Date: Thu, 26 Nov 2020 15:49:39 +0100
Subject: [PATCH] lib/api: Shut the api down gracefully (fixes #7138) (#7157)

---
 lib/api/api.go | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/lib/api/api.go b/lib/api/api.go
index 727675465..330169d80 100644
--- a/lib/api/api.go
+++ b/lib/api/api.go
@@ -415,7 +415,13 @@ func (s *service) Serve(ctx context.Context) error {
 		// Restart due to listen/serve failure
 		l.Warnln("GUI/API:", err, "(restarting)")
 	}
-	srv.Close()
+	// Give it a moment to shut down gracefully, e.g. if we are restarting
+	// due to a config change through the API, let that finish successfully.
+	timeout, cancel := context.WithTimeout(context.Background(), 100*time.Millisecond)
+	defer cancel()
+	if err := srv.Shutdown(timeout); err == timeout.Err() {
+		srv.Close()
+	}
 
 	return err
 }