From d900418ce2af5e92e6cb676fd71072a672e795c9 Mon Sep 17 00:00:00 2001
From: zhongwencool <zhongwencool@gmail.com>
Date: Wed, 16 Feb 2022 18:15:47 +0800
Subject: [PATCH] fix(license): fix maps:get/2 crash

---
 lib-ee/emqx_license/src/emqx_license_checker.erl | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/lib-ee/emqx_license/src/emqx_license_checker.erl b/lib-ee/emqx_license/src/emqx_license_checker.erl
index bf02266d0..8007ef3ce 100644
--- a/lib-ee/emqx_license/src/emqx_license_checker.erl
+++ b/lib-ee/emqx_license/src/emqx_license_checker.erl
@@ -123,10 +123,9 @@ ensure_check_expiry_timer(State) ->
     State#{expiry_alarm_timer => Ref}.
 
 cancel_timer(State, Key) ->
-    Ref = maps:get(Key, State),
-    _ = case is_reference(Ref) of
-            true -> erlang:cancel_timer(Ref);
-            false -> ok
+    _ = case maps:find(Key, State) of
+            {ok, Ref} when is_reference(Ref) -> erlang:cancel_timer(Ref);
+            _ -> ok
         end,
     ok.