nansencenter / nansencenter/nextsim
model crashing in forecast depending on restart
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- Dominant language
- C++
- Stars
- 10
- Forks
- 1
- Avg merge
- 9d 2h
- Merged PRs (30d)
- 1
Description
The forecast sometimes crashes when using the latest restart.
One example is in:
/mnt/10.11.12.232/nextsimf/nextsimf_forecasts/Kara_forecast/20180408-bak
It crashed on the 2nd time step, but I got it to run by manually modifying the config file to use the restart from /mnt/10.11.12.232/nextsimf/nextsimf_forecasts/Kara_forecast/20180406/restart/field_2.bin (instead of 20180407/restart/field_1.bin)
Speed got up to 160m/s in a very small opening (with 20% conc):
Could be a problem with the Laplacian drift thing or something inconsistent with the assimilation. I'll test it without assimilation to see if it crashes still
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Research direction
Start by reproducing the crash in the Kara forecast at the reported path, comparing the 20180407 restart with the 20180406/restart/field_2.bin workaround. Test the forecast without assimilation as proposed and inspect the reported speed and concentration behavior. Done means identifying the restart or assimilation condition that causes the crash and validating its resolution.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- cpp
- Domain
- hpc
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 25/100