[Qgis-user] Online layers (ArcGIS REST, WFS, WMS, WCS) failing on reopenning

[Nigel Cowlin]

Hi Both,
Richard, I think your suggestions about the service providers restricting
access might be what I'm experiencing, because this only seems to affect my
primary PC.  When I try on another PC there's no issue and all layers load
first time without a hitch!  I've also tried adjusting my timeout for
network requests to 30 seconds (30000ms), but that doesn't help.  Might be
a problem I have to put up with, but it's really frustrating.  I wonder if
there is a way of refreshing my IP whenever it gets too difficult to load
these layers!!?
Nigel

On Fri, 17 Oct 2025 at 11:22, Nigel Berjak - General <nigel at s3.co.za> wrote:

> Hi Richard
>
> Different Nigel here, but thanks for your responses and yes, it would be
> nice to be able to set a limit to the attempts and number of requests,
> as per your OPT OUT suggestion.
>
> ---
> Regards,
>
> Nigel Berjak
> Please consider the environment before printing this email.
>
> On 2025-10-17 12:19, Richard Duivenvoorde via QGIS-User wrote:
> > Hi Nigel,
> >
> > If your project contains a lot of online layers, there may be a chance
> > that some of them 'time out'.
> > I know of service providers that do not allow more then one or a few
> > simultaneous connections from one client or IP address to their
> > services (while QGIS is firing a whole set of them just to retrieve all
> > layers in the project).
> >
> > I'm also aware that service providers do 'throttling' of services: if
> > you do more the x requests met minute, you get a sort of handicap to
> > not request so much.
> >
> > If I were you I would try to set the Options/Network/Timeout for
> > network requests (ms) to something higher then the default 10s (10000
> > ms!).  Try to set it to a very high value and see if that helps.
> >
> > If not, then QGIS could maybe try to not fire so many requests at a
> > time upon opening.
> > Eg only the visible layers first (and the invisible ones after loading
> > the project).
> > If so, it would be best if you create an issue and provide a (big)
> > example project file with (preferably open) services and all your
> > network settings. But please first try to play with the 'network
> > timeout'...
> >
> > Another tip: F12 can show you all network requests that QGIS if firing.
> > IF a layer is failing to load, but the corresponding url's of the layer
> > to the service load in for example a browser, then you can at least
> > tell that it is not the service that is an issue...
> >
> > Earlier I also have said that I would want to have an option to opt OUT
> > of the requesting the 9 canvases around current mapcanvas. This is
> > often a unnecessary number of requests, just making providing a web
> > service harder...
> >
> > Regards,
> >
> > Richard Duivenvoorde
> >
> > On 17-10-2025 11:39, Nigel Cowlin via QGIS-User wrote:
> >> Hi,
> >> Not sure if this is the correct place for this kind of query - sorry
> >> if it is not!
> >>
> >> I'm using QGIS 3.34.7-Prizren and have a multi-layered project I
> >> regularly use. It includes locally saved layers of various types and
> >> quite a few web provided layers such as ArcGIS REST, WFS, WMS, WCS,
> >> etc. On reopening the project several of these web provided layers
> >> show on the 'Handle Unavailable Layers' pop up and are unavailable in
> >> the project. It is random which ones each time. Sometimes they are
> >> stubbornly difficult to restore (reconnect/repair data source). There
> >> is nothing wrong with the source of these layers. Do you know why this
> >> is and can you suggest a solution?
> >> Thank you.
> >> Nigel
> >>
> >> Nigel Cowlin BA(Hons) DipLA CMLI
> >> Director
> >>
> >> *NIGEL*COWLIN LTD
> >> Landscape Assessment & Design
> >> 07747 606533
> >> nigel at nigelcowlin.co.uk <mailto:nigel at nigelcowlin.co.uk>
> >> www.nigelcowlin.co.uk <http://www.nigelcowlin.co.uk>
> >> Maltwood, 6 Lamarsh Hill, Bures, CO8 5EH
> >>
> >> A Landscape Institute Registered Practice.
> >> Nigel Cowlin Limited - Registered Company in England & Wales No:
> >> 07628668. Registered Office: Maltwood, 6 Lamarsh Hill, Bures St Mary,
> >> CO8 5EH
> >>
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