Problem connecting to surgemq about surgemq HOT 2 OPEN

Figured it out:
I checked the CONNACK return code from the broker and found that it was 0x02 which means the broker rejects the client ID. The rejection is due to the regular expression against which the client ID is checked (see file surgemq/message/connect.go). It is ^[0-9a-zA-Z _]*$ which means that a client ID containing hyphens (-) will not be accepted.

Once I picked a client ID without hyphens the client connected without further issues. I wonder if there is a reason for rejecting hyphens as part of a client ID.

from surgemq.

You can fix it like this:
message/connect.go：

clientIdRegexp = regexp.MustCompile("^[0-9a-zA-Z _\\-|]*$") 

from surgemq.