|Duplicate message [message #1827742]
||Fri, 22 May 2020 10:36
| Giacomo Genovese
Registered: May 2020
I wonder if it's possible that a Pubblish message with QoS>0 could be sent twice to subscribers.
I thought no but then I read this on OASIS Spec. in section 126.96.36.199-DUP:
When using QoS 1, it is possible for a Client to receive a PUBLISH Packet with DUP set to 0 that contains a repetition of an Application Message that it received earlier, but with a different Packet Identifier.
So, here doubt comes to me. Could it happen in the MQTT mosquitto implementation ?
If yes, How?
I think it could happen only if the client publishing the message makes the error to send twice the same message with different ID.
Thanks in advance for your help.
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