[QGIS-Developer] GPKG modified by QgsServer, with qgsogrprovider having Wal set to false

[Sandro Santilli]

I'm struggling with a test that modifies a gpkg (only the header)
while QgsOgrProvider is NOT setting OGR_SQLITE_JOURNAL to WAL
(found with adding debugging to it).

Any idea about what else could be resulting in gpkg being open
in WAL mode, from a QgsServer request ?

A possible hint: modification of the file only happens when 2 GetMap
requests are made, by the same process (a single one of any of the
two requests does NOT result in modification).

Dragons are living here:
https://github.com/qgis/QGIS/pull/31980#issuecomment-589713595

--strk; 

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