Error: Unknown property, mqttVersionExplicit.

[zacsonskaria]

I am getting error during mqtt reconnect.

Error: Uncaught (in promise): Error: Unknown property, mqttVersionExplicit. Valid properties are: timeout userName password willMessage keepAliveInterval cleanSession useSSL invocationContext onSuccess onFailure hosts ports mqttVersion

Refer - https://www.eclipse.org/forums/index.php/t/1069724/

[KarlZeilhofer]

I encounter the same problem here.

This bug exists since Aug. 2015.

Is there any fix planed?

[icanos]

I’ll have a look at this in a few days, when I have more time, thanks!

[AbCthings]

To solve this issue I had to override the connectOptions variable, it seems a wrong/old parameter (mqttVersionExplicit) is automatically inserted during connection, so that when you attempt to reconnect the options are in a wrong format. Just override the variable and connect again, it will work.