FW: [Openais] Certain Things Regarding Event Service API

Mark Haverkamp markh at osdl.org
Wed Jul 27 07:21:53 PDT 2005


On Wed, 2005-07-27 at 14:49 +0530, Srinivas Rao wrote:
> Hi Mark,
> 
> Consider the scenario where I have two subscribers for a given event on the
> same node. Both subscribers have opened the same channel independently.
> Suppose this event gets lost. In this case only one of the subscribers will
> get the LOST EVENT message. 
> I think in this scenario both subscribers should be notified about LOST
> EVENT message. What is your opinion about this test case?
> 

This cannot happen.  The only place an event will be dropped is in the
delivery queue for a subscriber if it gets too full.  The event itself
is never dropped when received.


> Thanks,
> Srinivas
> 
> 
> -----Original Message-----
> From: openais-bounces at lists.osdl.org [mailto:openais-bounces at lists.osdl.org]
> On Behalf Of Mark Haverkamp
> Sent: Wednesday, July 27, 2005 4:02 AM
> To: Steven Dake
> Cc: Openais List
> Subject: Re: FW: [Openais] Certain Things Regarding Event Service API
> 
> On Tue, 2005-07-26 at 15:24 -0700, Steven Dake wrote:
> > On Tue, 2005-07-26 at 07:27 -0700, Mark Haverkamp wrote:
> > > On Tue, 2005-07-26 at 10:07 +0530, Arunachalam wrote:
> > > > Sir,
> > > > 
> > > > 	And about the 2nd question of 'LOST EVENT' event ?
> > > 
> > > I disagree that a lost event message should be sent to the entire
> > > cluster.  The situations causing, and response to, a lost event are
> > > described on page 23 of the specification.  The way that I understand
> > > this section is that it applies to individual subscribers.  If an event
> > > cannot be delivered to an individual subscriber for some reason, the
> > > LOST EVENT event is sent to that subscriber only. 
> > > 
> > > Mark.
> > > 
> > 
> > Mark
> > I agree with your assessment of the lost event definition on page 23 of
> > the evtB spec.  Lost events are sent per subscriber, not per channel.
> > 
> 
> OK, If I don't hear anything to the contrary, I'll close that bug
> tomorrow.
> 
> Mark.
> 
> 
-- 
Mark Haverkamp <markh at osdl.org>




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