From 2121da3755b2d8669eff34fb07af7b87c2edd073 Mon Sep 17 00:00:00 2001
From: terry-xiaoyu <506895667@qq.com>
Date: Sat, 8 Sep 2018 10:10:22 +0800
Subject: [PATCH] Ignore Will-Delay-Interval = 0

---
 src/emqx_protocol.erl | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/emqx_protocol.erl b/src/emqx_protocol.erl
index 7e95a4d90..4602337eb 100644
--- a/src/emqx_protocol.erl
+++ b/src/emqx_protocol.erl
@@ -370,7 +370,7 @@ process_packet(?SUBSCRIBE_PACKET(PacketId, Properties, RawTopicFilters),
                             end;
                            true ->
                                RawTopicFilters
-                        end, 
+                        end,
     case check_subscribe(
            parse_topic_filters(?SUBSCRIBE, RawTopicFilters1), PState) of
         {ok, TopicFilters} ->
@@ -732,7 +732,8 @@ shutdown(Reason, PState = #pstate{connected = true,
 send_willmsg(undefined) ->
     ignore;
 send_willmsg(WillMsg = #message{topic = Topic,
-                                headers = #{'Will-Delay-Interval' := Interval}}) when is_integer(Interval) ->
+                                headers = #{'Will-Delay-Interval' := Interval}})
+            when is_integer(Interval), Interval > 0 ->
     SendAfter = integer_to_binary(Interval),
     emqx_broker:publish(WillMsg#message{topic = <<"$delayed/", SendAfter/binary, "/", Topic/binary>>});
 send_willmsg(WillMsg) ->