[gdal-dev] Intermittent raster read/write error

[Jon Morris]

Great. Many thanks for the quick fix and for all your great work so far!

Jon

-----Original Message-----
From: Even Rouault <even.rouault at spatialys.com>
Sent: 14 March 2019 16:17
To: gdal-dev at lists.osgeo.org
Cc: Jon Morris <Jon.Morris at jbarisk.com>
Subject: Re: [gdal-dev] Intermittent raster read/write error

Jon,

> Is there a better way to determine that a write has failed? We've
> enabled gdal.UseExceptions, but if you call rb.WriteArray() on a
> read-only dataset, no error is raised. There is a write to stderr, but no exception.

The RasterIO() method called by WriteArray() didn't check access mode, so for small enough write w.r.t GDAL block cache, the error was only caught when dirty blocks in cache were actually written to storage by explicit
FlushCache() or dataset closing.
I've a candidate fix https://github.com/OSGeo/gdal/pull/1364 to address that.

Even

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