Do we really need GroupMaxIdleTime?

I had a thought.

If we allow open ended groups with the latest expiry time (asssuming a 
monotonic increasing sequence of message expiry times for the group) 
serving as the effective groupExpiryTime (as
I have previously proposed),  there might not be a need for the 
groupMaxIdleTime parameter.

If a sender wants to trigger the group termination from a max idle 
condition, it can start sending its mesages with an expiry time far 
enough into the future to be greater than the current time plus the 
desired GroupMaxIdleDuration value.   The behaviour of the receiver rmp 
will be the same as if there were a GroupMaxIdleDuration.

Also, I question whether there are any use cases for using both a 
GroupExpiryTime and a GroupMaxIdleDuration parameter in the same group 
sequence.  

Perhaps we can get rid of the GroupMaxIdleDuration element althogether!

Tom Rutt

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Tom Rutt		email: ; 
Tel: +1 732 801 5744          Fax: +1 732 774 5133