Hi Tim, I think MQTT messages has RETAINED Flag will be sent to the subscribing clients which not yet received the message.
But ActiveMQ 5.10, 5.11: the broker always send the message to the client even the message already delivered to this client before. Thank you, Tim, for your time following my problem. Tim Bain wrote > If I understand correctly, what you're saying is that the messages that > were being redelivered each time were doing so because they'd been sent > with the RETAIN flag > <http://www.hivemq.com/mqtt-essentials-part-8-retained-messages/> > set, > which (according to that page) means that they are supposed to be > delivered > to a subscriber when it subscribes. Based on that page, only the last > retained message should be delivered when the subscriber subscribes; was > that the behavior you were seeing, or were you getting more than one > message per subscriber each time? > > I don't see anything in that description that says that a subscriber > should > receive the message at any time other than when it *subscribes*, though > maybe the correct implementation is to send the latest message on each > reconnect and the page is just misleading. Do you have further > information > about the proper behavior of MQTT on that point? > > Tim -- View this message in context: http://activemq.2283324.n4.nabble.com/Active-MQ-5-11-1-MQTT-Message-is-automatically-sent-to-subscriber-when-it-is-connected-tp4697874p4698087.html Sent from the ActiveMQ - User mailing list archive at Nabble.com.
