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

[Nigel Berjak - General]

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
>> 
>> _______________________________________________
>> QGIS-User mailing list
>> QGIS-User at lists.osgeo.org
>> List info: https://lists.osgeo.org/mailman/listinfo/qgis-user
>> Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
> 
> _______________________________________________
> QGIS-User mailing list
> QGIS-User at lists.osgeo.org
> List info: https://lists.osgeo.org/mailman/listinfo/qgis-user
> Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user