Hi devs! I'm a junior developer and I'm working on a project trying to refresh an old GISWEB, to do so i chose QWC2+QGISServer.
Actual setup is: Debian 10, Apache2, QGIS-Server 3.8, using .shp as layers... the QWC2 works fine, WMS works fine, i can print some templates, print png, etc... The issue is that I'm trying to use the &ATLAS_PK (implemented in QGIS Server 3.6<https://github.com/qgis/QGIS/commit/21e3adfbcac4ffa339b28a4fb5fefc3a704bd2fb> and I'm getting an annoying "Internal Server Error". When I use "&ATLAS_PK=1" or "&ATLAS_PK=1, 2, 3", log says: "CRITICAL Server: An error occurred during the Atlas print WARNING: finish() called twice" As I read in the code here<https://github.com/qgis/QGIS/blob/master/src/server/services/wms/qgswmsrenderer.cpp> it could be caused by 2 things : "if ( pkIndexes.size() < 1 ) { throw QgsException( QStringLiteral( "An error occurred during the Atlas print" ) ); }" or: "QString errorString; atlas->setFilterExpression( filterString, errorString ); if ( !errorString.isEmpty() ) { throw QgsException( QStringLiteral( "An error occurred during the Atlas print" ) ); }" I can't determine which one is causing it. (My shapes have FID field, so pkIndexes shouldn't be null) If I try to use "&ATLAS_PK=*" it seems to work but I get "timed out" because I have like 4k features to print (I already changed the feature limit in QGIS Server conf). I'm going to try with a layer with less features as soon as I can and post updates. GetProjectSettings WMS request returns that I have 2 templates both with atlas enabled. There's not much documentation<https://docs.qgis.org/testing/en/docs/user_manual/working_with_ogc/server/services.html> to read about, as it's a new feature... The issue has nothing to do with QWC2, it's just the QGIS-Server. ISSUE URL: https://github.com/qgis/QGIS/issues/30817 Regards, Zeus.
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