[gdal-dev] Notice: issue about multi-threaded GTiff compression+decompression

[Kurt Schwehr]

Thanks for the heads up!

Can you share that SHAs of the fix and cause?

On Mon, Oct 16, 2023, 7:44 AM Even Rouault via gdal-dev <
gdal-dev at lists.osgeo.org> wrote:

> Hi,
>
> For GDAL 3.6.0 to 3.7.2, use of multi-threaded GTiff
> compression+decompression, in particular within the same file, as for
> example in a "gdalwarp -co COMPRESS=... -co NUM_THREADS=..." workflow
> can lead to deadlocks (process stalled forever) and/or data corruption
> (sometimes without errors at generation). Cf
> https://github.com/OSGeo/gdal/issues/8470 for a reproducer. The fix is
> in https://github.com/OSGeo/gdal/pull/8561
>
> The issue is particularly visible on Windows, or more generally any
> operating system (or file system where the output file is located) which
> has no VSIVirtualHandle::PRead() implementation, but it can also be
> occasionally reproduced on Linux (at least as a deadlock).
>
> Even
>
> --
> http://www.spatialys.com
> My software is free, but my time generally not.
>
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