From 13b14aafa561c6efb7ec7eb651490bc1c31bf7bf Mon Sep 17 00:00:00 2001
From: "Zaiming (Stone) Shi" <zmstone@gmail.com>
Date: Mon, 19 Dec 2022 09:23:05 +0100
Subject: [PATCH] fix(emqx_cover): wait for DOWN message before new spawn

---
 src/emqx_cover.erl | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/emqx_cover.erl b/src/emqx_cover.erl
index 629707775..62a306f9b 100644
--- a/src/emqx_cover.erl
+++ b/src/emqx_cover.erl
@@ -100,7 +100,13 @@ abort() ->
     _ = cover:stop(),
     case whereis(?SRC) of
         undefined -> ok;
-        Pid -> exit(Pid, kill)
+        Pid ->
+            Ref = monitor(process, Pid),
+            exit(Pid, kill),
+            receive
+                {'DOWN', Ref, process, Pid, _} ->
+                    ok
+            end
     end,
     ok.