From 22193d273a5c174b0f0d949788b21ccbc521921a Mon Sep 17 00:00:00 2001
From: William Yang <mscame@gmail.com>
Date: Mon, 25 Sep 2023 12:57:55 +0200
Subject: [PATCH] fix(quic): ignore undefined cacertfile

---
 apps/emqx/src/emqx_listeners.erl | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/apps/emqx/src/emqx_listeners.erl b/apps/emqx/src/emqx_listeners.erl
index 09a1bfc10..9abff250b 100644
--- a/apps/emqx/src/emqx_listeners.erl
+++ b/apps/emqx/src/emqx_listeners.erl
@@ -437,6 +437,10 @@ do_start_listener(quic, ListenerName, #{bind := Bind} = Opts) ->
                     case maps:get(cacertfile, SSLOpts, undefined) of
                         undefined ->
                             [];
+                        <<>> ->
+                            [];
+                        "" ->
+                            [];
                         CaCertFile ->
                             [{cacertfile, emqx_schema:naive_env_interpolation(CaCertFile)}]
                     end ++