Folks, this has started recently I believe and only today I've actually caught the problem.
I use HIVE MQTT for a project that now can't be used anyway. 
In saying that, I will raise my hand and say it was an unencrypted one, so I probably deserve what was being attempted.
NOTE: NOTHING DID - AFAIK.
(And previous ones may not have been related.)
All my machines have a routine that detects flow errors and sends a message (via LOCAL MQTT) and it has been going off a bit recently.
Today, I couldn't reset the alarm/notification.
So I went looking.
Failed to parse JSON string
is/was the ONLY message being displayed in the debug column.
You can see (above)) not much else.
Don't worry too much about the nodes seen here and/or the subflow.
So when I went to the node this is what I see:
What concerns me is the debug is supposed to show the entire message. Yet: Nothing.
Ok, opening the MQTT node may be a reason why.
So it may help me to change that bit.
And in doing so I am seeing:
{"topic":"blah","payload":"Hello CME466","qos":0,"retain":false,"_msgid":"8db7b59752c5a33b"}
This may be me crying WOLF but an important lesson I'm sharing.
if you use third party MQTT:
PLEASE!
Use a key!
As if you don't:
You are susceptible to foreign (unwanted) traffic.
And that could cause errors and all sorts of problems with your flows.
Now, my question:
I am at/on the hivemqtt website, but can't remember how to delete my channels.
Help - please.
