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Subject: [OASIS Issue Tracker] (MQTT-290) Session Expiry Will message.

    [ https://issues.oasis-open.org/browse/MQTT-290?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=63378#comment-63378 ] 

Ken Borgendale commented on MQTT-290:

The consensus on this at the Bellevue face to face was to have a time interval after the close of the connection at which the will message was sent.  The will message would then be sent either when that time interval expires or when the session is destroyed (by whatever reason).  The primary purpose for this function was stated to be for mobile clients or clients on an unreliable network, it was not desirable to send the will message if the client reconnected within a short period of time.

> Session Expiry Will message.
> ----------------------------
>                 Key: MQTT-290
>                 URL: https://issues.oasis-open.org/browse/MQTT-290
>             Project: OASIS Message Queuing Telemetry Transport (MQTT) TC
>          Issue Type: Improvement
>          Components: futures
>    Affects Versions: 5
>            Reporter: Andrew Banks
> The Will message is created on CONNECT and is published by the Server 
> if the network connection is lost without a DISCONNECT packet being
> processed.
> Jira 249 introduces the idea of a Session expiry interval, such that a 
> session can be deleted by the client and server some time after
> an Network disconnection.
> This Jira discusses whether another Will message should flow when
>  the client's Session is deleted. Possible approaches include:
> 1) Allowing a second Session Expiry will message to flow in the CONNECT packet, 
> in addition to the current Network Disconnection will message, 
> and publishing this when the session either expires or is deleted by an administrator.
> 2)Signaling via a flag in the CONNECT packet that the Will message
>  should be published when the session expires or is deleted,
> instead of when the network is disconnected.

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