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fix issue #500

This commit is contained in:
Feng 2016-04-12 15:11:01 +08:00
parent b257423730
commit 3733574105
1 changed files with 3 additions and 1 deletions
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4
src/emqttd_backend.erl
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@ -96,7 +96,9 @@ expire_messages(Time) when is_integer(Time) ->
when Time > (MegaSecs * 1000000 + Secs) -> Topic
end),
Topics = mnesia:select(retained_message, Match, write),
lists:foreach(fun(Topic) -> mnesia:delete({retained_message, Topic}) end, Topics)
lists:foreach(fun(<<"$SYS/", _/binary>>) -> ok; %% ignore $SYS/# messages
(Topic) -> mnesia:delete({retained_message, Topic})
end, Topics)
end).
-spec(retained_count() -> non_neg_integer()).