[Bug] topic subscription merges foo/# with foobar/#

[pinchy]

What did I do

Created a topic subscription in the format tray/# in order to subscribe to messages in the format tray/abcd1234/state tray/12cbac123/ping etc.

Note we have a seperate subscriptions setup for traybot/#

What happened

Messages of the format traybot/# are also being subscribed to

Expected

Expected result would be that traybot/# messages are ignored as they do not conform to the pattern tray/# it appears that the trailing / character is being ignored and that the subscription is instead tray# which is unexpected behaviour. (edit, see comment below)

Environment

• OS: OS version, e.g. macOS Big Sur 11.1
• MQTTX version, e.g. v1.5.0

More detail

Screenshot showing subscription and also one correct and one incorrect message. (Please note that the payloads, redacted as I don't have approval to share, do not contain the words "tray" anywhere)

[pinchy]

I deleted the subscription to traybot/# and the offending messages were not shown in the tray/# subscription. I recreated the traybot/# subscription and messages sent to the topic traybot/# were again shown in the tray/# subscription.

So it looks like that they're being "merged" somehow.

[pinchy]

Yep confirmed.

can easily recreate the bug.

1. create topic foo/#

2. send message to foo/1/test and it subscribes correctly

3. send message to foobar/1/test and it does not show (correct behaviour)

4. create seperate topic foobar/#

5. click on foo/# topic window

6. send message to foobar/1/test and message now shows in foo/# window

[ysfscream]

Hi, sorry for my late reply. Thanks for your response, but I cannot reproduce your issue:

And I noticed your MQTTX version is outdated. Please upgrade to the latest version (https://mqttx.app/downloads) to use.

[pinchy]

(Just want to say first that we love the product!)
Version updated. Was able to recreate on a new subscription to a new local mosquitto server instance (running on my computer). I've screenshotted each step.

2bcab0d75)

macOS 14.6.1
mosquito version 2.0.18
using mqtt version 3.1

[pinchy]

Hi, sorry for my late reply. Thanks for your response, but I cannot reproduce your issue:
snip

Looks like you did recreate it... you've only got the "tray/#" subscription selected in the subscription list, so you should only be seeing "tray/#" messages in the message stream. However the "traybot/3/state" message appeared erroneously.

[ysfscream]

(Just want to say first that we love the product!)

Thanks so much! 💛

I'm sorry, I misunderstood this issue. I reproduced it, and it's caused by the filter function on the search method for the database. It's a BUG, and we will fix it in the next version. Thanks.

[pinchy]

Happy days!

[ysfscream]

Updated on https://github.com/emqx/MQTTX/releases/tag/v1.11.0. Thanks for your feedback.