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Subject: [OASIS Issue Tracker] Updated: (MQTT-59) How are duplicate SUBSCRIBEs handled?
[ http://tools.oasis-open.org/issues/browse/MQTT-59?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Andrew Banks updated MQTT-59: ----------------------------- Proposal: Add to subscribe response 3.8.4 line 996 WD13 A subscribe request, which contains a topic filter that is identical to an existing topic filter completely replaces the existing subscription using the new requested maximum Qos values. Any existing retained publications matching the topic filter, are resent. The flow of publications is not interrupted. was: Add to subscribe response 3.8.4 line 996 WD13 An identical subscribe request, which has an exact literal comparison with a previous subscription completely replaces the existing subscription using the new requested Qos values. An existing retained publication is resent. This not the same as an unsubscribe followed by subscribe, hence the flow of publications is uninterrupted. > How are duplicate SUBSCRIBEs handled? > ------------------------------------- > > Key: MQTT-59 > URL: http://tools.oasis-open.org/issues/browse/MQTT-59 > Project: OASIS Message Queuing Telemetry Transport (MQTT) TC > Issue Type: Improvement > Components: core > Affects Versions: 3.1.1 > Reporter: Allan Stockdill-Mander > Fix For: 3.1.1 > > > This issue is related to MQTT-58 > If a client has a subscription to a topic and then issues a SUBSCRIBE to the same topic does it have two subscriptions (and depending on MQTT-58 receive two copies of each message) or just one? If the latter case do the values of the new SUBSCRIBE (such as QoS) replace those of the original subscription? -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: http://tools.oasis-open.org/issues/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira