LWT is sent when a connection is rejected

[jsantacruz87]

What happened?

I try to connect a client that doesn't have permissions, setting the last will message option, and althought the validation works perfectly, the broker publish the LWT message.
I think that it is a bug, because the client wasn't connected to the broker.

What did you expect to happen?

I expect that the broker doesn't send LWT message because the client was not connected.

How can we reproduce it (as minimally and precisely as possible)?

Try to connect to a broker with the MQTTX.app , set the LWT options ( topic:any that has a subscriber to could see the LWT that is published, payload:any, etc.. ) and set wrong client's options (username, clientid, password).
The subscriber will receive a LWT message of the client that is not connected.

Anything else we need to know?

No response

EMQX version

sysdescr : EMQX
version : 5.0.2
datetime : 2022-08-29T11:37:37.570495507+00:00
uptime : 2 days, 12 hours, 46 minutes, 34 seconds

OS version

$ cat /etc/os-release
PRETTY_NAME="Debian GNU/Linux 11 (bullseye)"
NAME="Debian GNU/Linux"
VERSION_ID="11"
VERSION="11 (bullseye)"
VERSION_CODENAME=bullseye
ID=debian
HOME_URL="https://www.debian.org/"
SUPPORT_URL="https://www.debian.org/support"
BUG_REPORT_URL="https://bugs.debian.org/"

$ uname -a
Linux 69ee644bc5ed 5.10.104-linuxkit #1 SMP Thu Mar 17 17:08:06 UTC 2022 x86_64 GNU/Linux

Log files

[thalesmg]

Hi @jsantacruz87 !

Thanks for the report, it'll be fixed in the next release.