Hi all, I've recently encountered some strange problem with parallel geoprocessing in ArcGIS Pro 2.8 & 2.9. I was using ArcHydro Tools for processing DEMs, these tools in turn use standard Spatial Analyst Tools, Hydrology tab especially. Some of these tools, as Sink and Flow direction can use parallel processing for speeding them up.
However, after some point, these tools cannot finish their job and just stuck saying "running", however they are not using any processing power anymore. What is even more interesting, it is that tools are not always stuck at the same point, sometimes (according to messages of the tool) it can succeed some steps at which it was stuck last time, sometimes it stucks at the very first step. And after being stuck you cannot cancel this tool, you have to manually stop the process through the task manager.
Funny thing is that in scratch folder/gdb after the tool being stuck you can see, that the step it was trying to finish was completed sucsessfully, however for some reason tool couldn't proseed further. Btw in ArcMap parallel processing with the same tools and data works just fine.
Reinstalling ArcGIS, cleaning temp folders, choosing shorter paths (like c:\data) does nothing. The only solution that worked for now is just turning off the parallel processing in enviroments, or to process this in ArcMap))) The problem is that from 10 minutes of processing the part of workflow it now takes 30 minutes.
If someone has ideas for potential fixes, or encountered the same problem as myself, please let me know.
