Feature request: Wildcards about emqx-sn HOT 4 CLOSED

It is allowed to have '+' and '#' in subscription topic.

from emqx-sn.

Hi, you are right. The client can SUBSCRIBE using wildcards, I just observed some weird behaviour and thought that feature was not implemented. Namely, the broker does not wait for a REGACK before sending the PUBLISH message. Additionally, the broker does not send a REGISTER package to the client to let it know the topic number of a topic that matches the wildcard, if the client re-CONNECTS using a clean session without DISCONNECTing first. For example, if I have two clients (c1 and c2), I observed the following sequence:
c1:
-> connect
<- connack
-> subscribe (topic name A/+/1)
<- suback (topic id = 0)
c2:
-> connect
<- connack
-> register (topic name A/B/1)
<- regack (topic id = 1)
-> publish (in topic A/B/1, qos=0)
c1:
<- register (topic name A/B/1, id = 1)
-> regack *(if the client does not REGACK, the publish message is sent nevertheless)
<- publish (in topic A/B/1, qos=0)
Up to this point everything is good (except for *). But if c1 connects at this point using a clean session without previously disconnecting, the register message is not sent anymore. E.g.
c1
-> connect (clean session)
<- connack
-> subscribe (topic name A/+/1)
<- suback (topic id = 0)
c2:
-> publish (in topic A/B/1, qos=0)
c1:
(Here I would have expected the REGISTER of the topic)
<- publish (in topic A/B/1, qos=0)

The REGISTER is sent to the client if c1 DISCONNECT before re-CONNECTing with clean session.

from emqx-sn.

Your are right. From the view of client, broker should destroy all the registered topic since clean-session is true. Please be patient for the fix.

from emqx-sn.

@jpmzometa The issue has been fixed in v2.3.5.

from emqx-sn.