JS Client app & busy Omnis server
Mayada,
I dont know if there is a way to determine on a user by user basis which
ones are inactive at that time. What Thad mentioned previously about
$lastresponse
might be what you are after.
Andrew
On Tue, Nov 21, 2017 at 4:57 PM, Mayada Al-Kishtini
wrote:
> Hi Andrew,
> Thank you for your input, I’ll add what you suggest to the html template.
>
> A question regarding your comment about setting the $timeout for inactive
> connections: how do you determine the inactive connections while the app is
> running?
>
> Thank you,
> Mayada
>
> On Tue, Nov 21, 2017 at 4:10 PM, Andrew Stolarz
>
> > Hi Mayada,
> >
> > I submitted a bug to omnis years ago that certain devices/browsers would
> > not “kill” the omnis license when you closed the browser. A quick
> > workaround was adding the onunload as mentioned below in the remote form.
> > From memory it was for Omnis 6.x.
> >
> >
> > ——————–
> >
> > > “margin:0;overflow:auto”>
> >
> > To read :
> >
> > > *onbeforeunload=”jOmnis.onUnload()” *style=”margin:0;overflow:auto”>
> >
> >
> >
> > I.e. you need to add
> > *onbeforeunload=”jOmnis.onUnload()” *
> >
> > ——————–
> >
> >
> > I would also recommend you set a timeout value for inactive connections
> > anyways (I think its $timeout).
> >
> >
> >
> >
> > Andrew
> >
> >
> >
> > On Tue, Nov 21, 2017 at 3:42 PM, Mayada Al-Kishtini <
> malkishtini@gmail.com
> > >
> > wrote:
> >
> > > Hi Vik,
> > >
> > > Thank you so much for sharing you solutions and suggestions…specially
> > > this one “1. monitor the #of connections per each omnis server. We
> capped
> > > that at 5/omnis server because the app was very complex.”
> > >
> > > We do run a very complex form (as an app) with multiple tabs, so seeing
> > > this issue only at sites with high number of users might explain the
> need
> > > to put a cap on the connection # allowed to a single server.
> > >
> > > Do you run a separate server to fork the connections to the right
> server
> > > when it reaches max number of conn.? or how do you control that?
> > >
> > > I’ll look more closely into your other suggestions and see what I can
> do
> > > with them.
> > >
> > > BTW, I was able to reproduce the orphan connections myself when the
> > server
> > > is busy with a high number of users..I called a form, it took a while
> to
> > > load, creating 2 connections (exactly same time, say one connection1
> and
> > > the 2nd connection2), when I closed the app, only connection 2 is
> closed,
> > > leaving connection 1 open.
> > >
> > > Thank you very much,
> > > Mayada
> > >
> > >
> > >
> > >
> > >
> > > On Tue, Nov 21, 2017 at 3:22 PM, Vik Shah <Vik@keys2solutions.com.au>
> > > wrote:
> > >
> > > > Hi Mayada,
> > > >
> > > > It sounds like either the client connections are not closing cleanly
> > and
> > > > this could leave you with orphan connections. Without looking at your
> > > code
> > > > I can only say that the $destruct of the remote task isn’t finishing
> > > > properly, could be a $canclose somewhere that is preventing the
> > shutdown
> > > of
> > > > connection and thus it lies wait till the remote task times out.
> > > >
> > > > WRT the licence consumption that is something that I’ve seen in the
> > past,
> > > > could be coding/logic related issue too, once again the specifics
> cant
> > be
> > > > ascertained easily only a proper code analysis can yield those
> answers.
> > > >
> > > > But, to curb what you are saying I implemented a mixed bag solution
> > > > comprising of omnis and non-omnis components. This solution would
> > > > 1. monitor the #of connections per each omnis server. We capped that
> at
> > > > 5/omnis server because the app was very complex.
> > > > 2. Allow remote management of task/user a.k.a we could message and/or
> > > kill
> > > > the connected user’s remote task session.
> > > > 3. Allowed statistical analysis of connections/server.
> > > > 4. Kill and restart servers dynamically using external scripts and
> > > > redirecting incoming connections to other omnis servers.
> > > > 5. Notified the in-house admins whenever a server was frozen or
> > restarted
> > > > or failed to start.
> > > >
> > > > > Any advise on how to check for server state (busy or not) in the
> > remote
> > > > > task, so one can code around it?
> > > >
> > > > There are remote task events that are triggered on evBusy, you could
> > use
> > > > them. I devised another way of doing this, I would ping an ultra-thin
> > > > remote task that would quit instantly with a date/time message. If
> that
> > > > happened in under 1 second then the server is functioning if it took
> > > > longer, it usually meant that it was time for a kill-restart cycle.
> > > >
> > > > Hope that helps.
> > > >
> > > > Regards,
> > > >
> > > > Vik Shah
> > > > Director
> > > > Keys2Solutions
> > > > AU: +61 411 493 495
> > > > US: +1 (415) 413 4172
> > > > US: +1 (646) 583 2403
> > > >
> > > >
> > > >
> > > >
> > > > > On 22 Nov 2017, at 05:17, Mayada Al-Kishtini <
> malkishtini@gmail.com>
> > > > wrote:
> > > > >
> > > > > Hi $all,
> > > > >
> > > > > We are running into an issue with our web app at one of our sites,
> > the
> > > > > issue appears when we have more than 35-40 simultaneous connections
> > to
> > > > the
> > > > > OS server 6.3/64bit with 50 users license.
> > > > >
> > > > > What happens is when I try to connect to the web app at that site
> and
> > > the
> > > > > server has more than 35 connections (not sure of the exact number
> of
> > > > > connections that will cause the problem to appear, but something
> more
> > > > than
> > > > > 30-35), it takes a while to load the form and I when I check the
> log
> > I
> > > > > notice that 2 remote task connections, sometimes 3 are established
> > when
> > > > the
> > > > > form is loaded, then when a user disconnects from the server, that
> > will
> > > > > close only one of the connections (the last one) and leave the rest
> > as
> > > > > orphan connections and that will consume licenses and then the site
> > > will
> > > > > soon runs out of web licenses and we have to restart the server.
> > > > >
> > > > > My first time to encounter this issue, anyone else has seen any
> issue
> > > > like
> > > > > this before?
> > > > >
> > > > > Any advise on how to check for server state (busy or not) in the
> > remote
> > > > > task, so one can code around it?
> > > > >
> > > > > Thank you,
> > > > > Mayada
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