Re: [milo-dev] [Q] Timing for deleting Subscription and MonitoredItems

[Shigeru Ishida <ishida_shigeru@xxxxxxxxxxx>]

Thank you very much. I understood.

<kevinherron@xxxxxxxxx> wrote, Tue, 16 Jan 2018 17:18:43 -0800

> They should get deleted when the session either times out or is closed by
> the client.
> 
> If the client is disconnecting without closing the session, and the session
> timeout was significant, this could result in the number of orphaned
> sessions (and the associated subscriptions and items) growing.
> 
> I'll take a look and make sure that session are timing out and being
> cleaned up correctly as well, just in case.
> 
> On Tue, Jan 16, 2018 at 5:05 PM, Shigeru Ishida <ishida_shigeru@xxxxxxxxxxx>
> wrote:
> 
> > Hi Kevin,
> >
> > When will information of Subscription and MonitoredItems created by
> > the server be deleted ?
> >
> > Will the server automatically delete these information when default
> > mechanism of Milo works when the client terminates the connection
> > normally or when the client terminates unexpectedly ?
> > (ex. kill -9 client-pid)
> >
> > Or is it necessary for the client to record the SubscriptionId previously
> > used and throw a delete request to the server when the client is restarted
> > ?
> >
> > Here, with Apache Felix removed, the server is running stably.
> > Once the re-establishing process has been executed, createSubscription()
> > and createMonitoredItems() are called and processing continues.
> >
> > Therefore, a simulation server assuming process lines, process units,
> > and node items of a factory with a larger scale is also created and running
> > continuously. The total number of node items of this simulation server is
> > over 10,000.
> >
> > Another company's client product is connected to this server, and OOME has
> > occurred on the server as a result of this client repeatedly connecting and
> > disconnecting.
> >
> > Regards,
> >
> > --Shigeru
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