[GRASS-dev] [QGIS-Developer] Running grass algorithms in threads

[Markus Neteler]

On Wed, Aug 15, 2018 at 11:54 AM Rudi von Staden <rudivs at gmail.com> wrote:
>
> Thanks all for your thoughts on this. I suspect the problem may be race conditions being set up between https://github.com/qgis/QGIS/blob/master/python/plugins/processing/algs/grass7/Grass7Utils.py and https://github.com/qgis/QGIS/blob/master/python/plugins/processing/algs/grass7/Grass7Algorithm.py. It attempts to use an existing session and shared mapset which could be problematic from the sounds of things. It might be an idea to add an optional parameter to grass algorithms to not use shared mapsets and create a new mapset for each process?

It just came in yesterday :)

See
https://lists.osgeo.org/pipermail/grass-user/2018-August/078936.html
[GRASS-user] New CLI option --tmp-location in 7.5 to enhance --exec

Perhaps this approach will solve the issues?

Best
Markus