When I look in the cache/wfsprovider folder, there's another folder with almost three times the layer number in other files: wfs_cache_XX.sqlite, -shm, and -wal.
I had to track down a public wfs with a small enough sample set to be repeatable. This Python code gives the error in 2.18.7 and a 2.99 nightly I grabbed for testing: iface.addVectorLayer(' restrictToRequestBBOX=\'1\' srsname=\'EPSG:4326\' typename=\'sdr:nyu_2451_34490\' url=\'https://maps-public.geo. nyu.edu/geoserver/sdr/wfs\' version=\'auto\' table="" sql=',"example01","WFS") iface.addVectorLayer(' restrictToRequestBBOX=\'1\' srsname=\'EPSG:4326\' typename=\'sdr:nyu_2451_34490\' url=\'https://maps-public.geo. nyu.edu/geoserver/sdr/wfs\' version=\'auto\' table="" sql=',"example02","WFS") iface.addVectorLayer(' restrictToRequestBBOX=\'1\' srsname=\'EPSG:4326\' typename=\'sdr:nyu_2451_34490\' url=\'https://maps-public.geo. nyu.edu/geoserver/sdr/wfs\' version=\'auto\' table="" sql=',"example03","WFS") iface.addVectorLayer(' restrictToRequestBBOX=\'1\' srsname=\'EPSG:4326\' typename=\'sdr:nyu_2451_34490\' url=\'https://maps-public.geo. nyu.edu/geoserver/sdr/wfs\' version=\'auto\' table="" sql=',"example04","WFS") iface.addVectorLayer(' restrictToRequestBBOX=\'1\' srsname=\'EPSG:4326\' typename=\'sdr:nyu_2451_34490\' url=\'https://maps-public.geo. nyu.edu/geoserver/sdr/wfs\' version=\'auto\' table="" sql=',"example05","WFS") iface.addVectorLayer(' restrictToRequestBBOX=\'1\' srsname=\'EPSG:4326\' typename=\'sdr:nyu_2451_34490\' url=\'https://maps-public.geo. nyu.edu/geoserver/sdr/wfs\' version=\'auto\' table="" sql=',"example06","WFS") iface.addVectorLayer(' restrictToRequestBBOX=\'1\' srsname=\'EPSG:4326\' typename=\'sdr:nyu_2451_34490\' url=\'https://maps-public.geo. nyu.edu/geoserver/sdr/wfs\' version=\'auto\' table="" sql=',"example07","WFS") iface.addVectorLayer(' restrictToRequestBBOX=\'1\' srsname=\'EPSG:4326\' typename=\'sdr:nyu_2451_34490\' url=\'https://maps-public.geo. nyu.edu/geoserver/sdr/wfs\' version=\'auto\' table="" sql=',"example08","WFS") iface.addVectorLayer(' restrictToRequestBBOX=\'1\' srsname=\'EPSG:4326\' typename=\'sdr:nyu_2451_34490\' url=\'https://maps-public.geo. nyu.edu/geoserver/sdr/wfs\' version=\'auto\' table="" sql=',"example09","WFS") iface.addVectorLayer(' restrictToRequestBBOX=\'1\' srsname=\'EPSG:4326\' typename=\'sdr:nyu_2451_34490\' url=\'https://maps-public.geo. nyu.edu/geoserver/sdr/wfs\' version=\'auto\' table="" sql=',"example00","WFS") iface.addVectorLayer(' restrictToRequestBBOX=\'1\' srsname=\'EPSG:4326\' typename=\'sdr:nyu_2451_34490\' url=\'https://maps-public.geo. nyu.edu/geoserver/sdr/wfs\' version=\'auto\' table="" sql=',"example11","WFS") iface.addVectorLayer(' restrictToRequestBBOX=\'1\' srsname=\'EPSG:4326\' typename=\'sdr:nyu_2451_34490\' url=\'https://maps-public.geo. nyu.edu/geoserver/sdr/wfs\' version=\'auto\' table="" sql=',"example12","WFS") iface.addVectorLayer(' restrictToRequestBBOX=\'1\' srsname=\'EPSG:4326\' typename=\'sdr:nyu_2451_34490\' url=\'https://maps-public.geo. nyu.edu/geoserver/sdr/wfs\' version=\'auto\' table="" sql=',"example13","WFS") iface.addVectorLayer(' restrictToRequestBBOX=\'1\' srsname=\'EPSG:4326\' typename=\'sdr:nyu_2451_34490\' url=\'https://maps-public.geo. nyu.edu/geoserver/sdr/wfs\' version=\'auto\' table="" sql=',"example14","WFS") iface.addVectorLayer(' restrictToRequestBBOX=\'1\' srsname=\'EPSG:4326\' typename=\'sdr:nyu_2451_34490\' url=\'https://maps-public.geo. nyu.edu/geoserver/sdr/wfs\' version=\'auto\' table="" sql=',"example15","WFS") iface.addVectorLayer(' restrictToRequestBBOX=\'1\' srsname=\'EPSG:4326\' typename=\'sdr:nyu_2451_34490\' url=\'https://maps-public.geo. nyu.edu/geoserver/sdr/wfs\' version=\'auto\' table="" sql=',"example16","WFS") iface.addVectorLayer(' restrictToRequestBBOX=\'1\' srsname=\'EPSG:4326\' typename=\'sdr:nyu_2451_34490\' url=\'https://maps-public.geo. nyu.edu/geoserver/sdr/wfs\' version=\'auto\' table="" sql=',"example17","WFS") iface.addVectorLayer(' restrictToRequestBBOX=\'1\' srsname=\'EPSG:4326\' typename=\'sdr:nyu_2451_34490\' url=\'https://maps-public.geo. nyu.edu/geoserver/sdr/wfs\' version=\'auto\' table="" sql=',"example18","WFS") iface.addVectorLayer(' restrictToRequestBBOX=\'1\' srsname=\'EPSG:4326\' typename=\'sdr:nyu_2451_34490\' url=\'https://maps-public.geo. nyu.edu/geoserver/sdr/wfs\' version=\'auto\' table="" sql=',"example19","WFS") iface.addVectorLayer(' restrictToRequestBBOX=\'1\' srsname=\'EPSG:4326\' typename=\'sdr:nyu_2451_34490\' url=\'https://maps-public.geo. nyu.edu/geoserver/sdr/wfs\' version=\'auto\' table="" sql=',"example10","WFS") iface.addVectorLayer(' restrictToRequestBBOX=\'1\' srsname=\'EPSG:4326\' typename=\'sdr:nyu_2451_34490\' url=\'https://maps-public.geo. nyu.edu/geoserver/sdr/wfs\' version=\'auto\' table="" sql=',"example21","WFS") iface.addVectorLayer(' restrictToRequestBBOX=\'1\' srsname=\'EPSG:4326\' typename=\'sdr:nyu_2451_34490\' url=\'https://maps-public.geo. nyu.edu/geoserver/sdr/wfs\' version=\'auto\' table="" sql=',"example22","WFS") iface.addVectorLayer(' restrictToRequestBBOX=\'1\' srsname=\'EPSG:4326\' typename=\'sdr:nyu_2451_34490\' url=\'https://maps-public.geo. nyu.edu/geoserver/sdr/wfs\' version=\'auto\' table="" sql=',"example23","WFS") iface.addVectorLayer(' restrictToRequestBBOX=\'1\' srsname=\'EPSG:4326\' typename=\'sdr:nyu_2451_34490\' url=\'https://maps-public.geo. nyu.edu/geoserver/sdr/wfs\' version=\'auto\' table="" sql=',"example24","WFS") iface.addVectorLayer(' restrictToRequestBBOX=\'1\' srsname=\'EPSG:4326\' typename=\'sdr:nyu_2451_34490\' url=\'https://maps-public.geo. nyu.edu/geoserver/sdr/wfs\' version=\'auto\' table="" sql=',"example25","WFS") iface.addVectorLayer(' restrictToRequestBBOX=\'1\' srsname=\'EPSG:4326\' typename=\'sdr:nyu_2451_34490\' url=\'https://maps-public.geo. nyu.edu/geoserver/sdr/wfs\' version=\'auto\' table="" sql=',"example26","WFS") iface.addVectorLayer(' restrictToRequestBBOX=\'1\' srsname=\'EPSG:4326\' typename=\'sdr:nyu_2451_34490\' url=\'https://maps-public.geo. nyu.edu/geoserver/sdr/wfs\' version=\'auto\' table="" sql=',"example27","WFS") iface.addVectorLayer(' restrictToRequestBBOX=\'1\' srsname=\'EPSG:4326\' typename=\'sdr:nyu_2451_34490\' url=\'https://maps-public.geo. nyu.edu/geoserver/sdr/wfs\' version=\'auto\' table="" sql=',"example28","WFS") iface.addVectorLayer(' restrictToRequestBBOX=\'1\' srsname=\'EPSG:4326\' typename=\'sdr:nyu_2451_34490\' url=\'https://maps-public.geo. nyu.edu/geoserver/sdr/wfs\' version=\'auto\' table="" sql=',"example29","WFS") iface.addVectorLayer(' restrictToRequestBBOX=\'1\' srsname=\'EPSG:4326\' typename=\'sdr:nyu_2451_34490\' url=\'https://maps-public.geo. nyu.edu/geoserver/sdr/wfs\' version=\'auto\' table="" sql=',"example20","WFS") iface.addVectorLayer(' restrictToRequestBBOX=\'1\' srsname=\'EPSG:4326\' typename=\'sdr:nyu_2451_34490\' url=\'https://maps-public.geo. nyu.edu/geoserver/sdr/wfs\' version=\'auto\' table="" sql=',"example31","WFS") iface.addVectorLayer(' restrictToRequestBBOX=\'1\' srsname=\'EPSG:4326\' typename=\'sdr:nyu_2451_34490\' url=\'https://maps-public.geo. nyu.edu/geoserver/sdr/wfs\' version=\'auto\' table="" sql=',"example32","WFS") iface.addVectorLayer(' restrictToRequestBBOX=\'1\' srsname=\'EPSG:4326\' typename=\'sdr:nyu_2451_34490\' url=\'https://maps-public.geo. nyu.edu/geoserver/sdr/wfs\' version=\'auto\' table="" sql=',"example33","WFS") iface.addVectorLayer(' restrictToRequestBBOX=\'1\' srsname=\'EPSG:4326\' typename=\'sdr:nyu_2451_34490\' url=\'https://maps-public.geo. nyu.edu/geoserver/sdr/wfs\' version=\'auto\' table="" sql=',"example34","WFS") iface.addVectorLayer(' restrictToRequestBBOX=\'1\' srsname=\'EPSG:4326\' typename=\'sdr:nyu_2451_34490\' url=\'https://maps-public.geo. nyu.edu/geoserver/sdr/wfs\' version=\'auto\' table="" sql=',"example35","WFS") iface.addVectorLayer(' restrictToRequestBBOX=\'1\' srsname=\'EPSG:4326\' typename=\'sdr:nyu_2451_34490\' url=\'https://maps-public.geo. nyu.edu/geoserver/sdr/wfs\' version=\'auto\' table="" sql=',"example36","WFS") iface.addVectorLayer(' restrictToRequestBBOX=\'1\' srsname=\'EPSG:4326\' typename=\'sdr:nyu_2451_34490\' url=\'https://maps-public.geo. nyu.edu/geoserver/sdr/wfs\' version=\'auto\' table="" sql=',"example37","WFS") iface.addVectorLayer(' restrictToRequestBBOX=\'1\' srsname=\'EPSG:4326\' typename=\'sdr:nyu_2451_34490\' url=\'https://maps-public.geo. nyu.edu/geoserver/sdr/wfs\' version=\'auto\' table="" sql=',"example38","WFS") iface.addVectorLayer(' restrictToRequestBBOX=\'1\' srsname=\'EPSG:4326\' typename=\'sdr:nyu_2451_34490\' url=\'https://maps-public.geo. nyu.edu/geoserver/sdr/wfs\' version=\'auto\' table="" sql=',"example39","WFS") iface.addVectorLayer(' restrictToRequestBBOX=\'1\' srsname=\'EPSG:4326\' typename=\'sdr:nyu_2451_34490\' url=\'https://maps-public.geo. nyu.edu/geoserver/sdr/wfs\' version=\'auto\' table="" sql=',"example30","WFS") On Aug 21, 2017 12:55 PM, "Jorge Gustavo Rocha" <j...@di.uminho.pt> wrote: Hi Dan, QGIS uses a local SpatiaLite database to store the features on the client side. The cache should be in your .qgis2/cache/wfsprovider folder. Can you check the contents of the folder? If your WFS is a public server, can your share the service URL and the layer/layers to reproduce the problem? Regards, J. Gustavo On 21-08-2017 16:42, Dan Meerschaert wrote: > I'm working on a plugin for QGIS 2.18.7 on Windows that (as a part of > its other function) grabs many wfs layers at once. > > The problem is, after about 30-50 simultaneous connections, QGIS throws > up a "Cannot create temporary SpatiaLite cache" error in the WFS log > panel and doesn't load all the data. > > I'm able to repeat this by picking any given wfs layer, and duplicating > it manually using iface.addVectorLayer (...) in the python console. > > Can anyone help me out? > > Respectfully, > -Dan > > > _______________________________________________ > Qgis-user mailing list > Qgis-user@lists.osgeo.org > List info: https://lists.osgeo.org/mailman/listinfo/qgis-user > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user > J. Gustavo -- Jorge Gustavo Rocha Departamento de Informática Universidade do Minho 4710-057 Braga Tel: +351 253604480 Fax: +351 253604471 Móvel: +351 910333888 skype: nabocudnosor _______________________________________________ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
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