Keep Alive Timeout

The connection is being closed because no packet was received within one and a half times the Keep Alive period. Sent by the server in a DISCONNECT packet.

References

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

In this namespace

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DisconnectWithWillMessage GrantedQoS0 GrantedQoS1 GrantedQoS2 ImplementationSpecificError KeepAliveTimeout MalformedPacket MessageRateTooHigh NoMatchingSubscribers NormalDisconnection NoSubscriptionFound