Timo,
I just did, and wrote a reply there.
Regards,
Dmitry
On 6/30/22 14:17, Timo Koch wrote:
Dear Dmitry,
thank you! Can you try if this
https://git.iws.uni-stuttgart.de/dumux-repositories/dumux/-/merge_requests/3178
fixes your issue?
Best
Timo
On 30 Jun 2022, at 13:14, Dmitry Pavlov <dmitry.pav...@outlook.com>
wrote:
Timo,
Thank you. I filed a bug report:
https://git.iws.uni-stuttgart.de/dumux-repositories/dumux/-/issues/1171
Unfortunately, I can not prepare a proper test at present.
Best regards,
Dmitry
On 6/30/22 13:55, Timo Koch wrote:
Hi Dmitry,
looks like you are running into a deadlock. Looks like a bug in the
exception handler of the Newton
(I assume
https://git.iws.uni-stuttgart.de/dumux-repositories/dumux/-/blob/master/dumux/nonlinear/newtonsolver.hh#L548 is
wrong because the exception cannot be assumed to be thrown on all
processes).
Thanks for reporting this. Would you open a bug report?
Best wishes
Timo
On 29 Jun 2022, at 19:36, Dmitry Pavlov <dmitry.pav...@outlook.com>
wrote:
Hello,
In one porous flow simulation, I get this message:
Newton iteration 6 done, residual = 3.1654e+13
Solve: M deltax^k = rNewton: Caught exception: "FMatrixError
[luDecomposition:/home/dpavlov/DUMUX/dune-common/dune/common/densematrix.hh:939]:
matrix is singular"
... and it is fine. Matrix can be singular, no objection here.
After this, the Newton solver reports that it did not converge and
restarts with a smaller time step, and eventually it proceeds.
However, when I run the same simulation with MPI, I get this
Newton iteration 8 done, residual = 7.2437e+13
Solve: M deltax^k =
and the program hangs.
So it seems that it misses the singularity in the MPI mode and
tries to proceed with the current time step, to no avail.
How this can be cured?
Best regards,
Dmitry
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