Retain Not Supported

The server does not support retained messages. Sent in a CONNACK or DISCONNECT packet when the client publishes a RETAIN message to a server that has not announced support for it.

References

docs.oasis-open.org/mqtt/mqtt/v5.0/os/mqtt-v5.0-os.html

In this namespace

← previous ReceiveMaximumExceeded Receive Maximum Exceeded next → ServerBusy Server Busy

ProtocolError QoSNotSupported QuotaExceeded ReAuthenticate ReceiveMaximumExceeded RetainNotSupported ServerBusy ServerMoved ServerShuttingDown ServerUnavailable SessionTakenOver