[petsc-users] DIVERGED_NONLINEAR_SOLVE error

[Matthew Knepley]

On Sat, Aug 3, 2013 at 4:41 AM, Jin, Shuangshuang <Shuangshuang.Jin at pnnl.gov
> wrote:

> Is there a quick way to turn on the debugging in my build, or I have to do
> the following again?****
>
> ** **
>
> Configure options --with-scalar-type=complex --with-clanguage=C++
> PETSC_ARCH=arch-complex --with-fortran-kernels=generic
> --download-superlu_dist --download-mumps --download-scalapack
> --download-parmetis --download-metis --download-elemental ****
>
> ** **
>
> It usually takes over an hour to reconfigure PETSc on my machine…
>

That is the way. I think its time to upgrade your Commodore 64 :)

    Matt


>
>
> Thanks,****
>
> Shuangshuang****
>
> ** **
>
> *From:* Matthew Knepley [mailto:knepley at gmail.com]
> *Sent:* Friday, August 02, 2013 1:33 PM
> *To:* Jin, Shuangshuang
> *Cc:* petsc-users at mcs.anl.gov
> *Subject:* Re: [petsc-users] DIVERGED_NONLINEAR_SOLVE error****
>
> ** **
>
> On Sat, Aug 3, 2013 at 4:22 AM, Jin, Shuangshuang <
> Shuangshuang.Jin at pnnl.gov> wrote:****
>
> Hello, ****
>
>  ****
>
>      My code solves a linear system AX=B using superlu_dist in PETSc, and
> use some of X’s data to solve a DAE problem. I get a very wild error:****
>
>  ****
>
>      When I use less than 8 processors to run the code, it runs just fine
> with correct results. When I use greater than 8 processors, such as 16 or
> 32 processors, I’ll get an error and a lot of generated core.##### files.
> ****
>
>  ****
>
> [0]PETSC ERROR: --------------------- Error Message
> ------------------------------------****
>
> [0]PETSC ERROR:   !****
>
> [0]PETSC ERROR: TSStep has failed due to DIVERGED_NONLINEAR_SOLVE,
> increase -ts_max_snes_failures or make negative to attempt recovery!****
>
> [0]PETSC ERROR:
> ------------------------------------------------------------------------**
> **
>
> [0]PETSC ERROR: Petsc Development GIT revision:
> a0a914e661bf6402b8edabe0f5a2dad46323f69f  GIT Date: 2013-06-05 14:18:39
> -0500****
>
> [0]PETSC ERROR: See docs/changes/index.html for recent updates.****
>
> [0]PETSC ERROR: See docs/faq.html for hints about trouble shooting.****
>
> [0]PETSC ERROR: See docs/index.html for manual pages.****
>
> [0]PETSC ERROR:
> ------------------------------------------------------------------------**
> **
>
> [0]PETSC ERROR: dynSim on a arch-complex named node0055.local by d3m956
> Fri Aug  2 11:56:10 2013****
>
> [0]PETSC ERROR: Libraries linked from
> /pic/projects/ds/petsc-dev.6.06.13/arch-complex/lib****
>
> [0]PETSC ERROR: Configure run at Fri Jul 26 14:32:37 2013****
>
> [0]PETSC ERROR: Configure options --with-scalar-type=complex
> --with-clanguage=C++ PETSC_ARCH=arch-complex --with-fortran-kernels=generic
> --download-superlu_dist --download-mumps --download-scalapack
> --download-parmetis --download-metis --download-elemental --with-debugging=0
> ****
>
> [0]PETSC ERROR:
> ------------------------------------------------------------------------**
> **
>
> [0]PETSC ERROR: TSStep() line 2515 in
> /pic/projects/ds/petsc-dev.6.06.13/src/ts/interface/ts.c****
>
> [0]PETSC ERROR: TSSolve() line 2632 in
> /pic/projects/ds/petsc-dev.6.06.13/src/ts/interface/ts.c****
>
> [0]PETSC ERROR: simu() line 566 in "unknowndirectory/"simulation.C****
>
> [0]PETSC ERROR: runSimulation() line 99 in "unknowndirectory/"dynSim.h****
>
> [node0055:32539] *** Process received signal *******
>
> [node0055:32535] *** Process received signal *******
>
> [node0055:32535] Signal: Aborted (6)****
>
> [node0055:32535] Signal code:  (24153104)****
>
> [node0055:32534] *** Process received signal *******
>
> [node0055:32534] Signal: Aborted (6)****
>
> [node0055:32534] Signal code:  (24199552)****
>
> [node0055:32539] Signal: Aborted (6)****
>
> [node0055:32539] Signal code:  (24157648)****
>
> [node0055:32537] *** Process received signal *******
>
> [node0055:32537] Signal: Aborted (6)****
>
> [node0055:32537] Signal code:  (24546704)****
>
> [node0055:32538] *** Process received signal *******
>
>  ****
>
> The Error Message from PETSc pointed out that “TSStep has failed due to
> DIVERGED_NONLINEAR_SOLVE, increase -ts_max_snes_failures or make negative
> to attempt recovery!”, but I think it’s because the superlu_dist computed
> an all “nan” X as I printed it out. ****
>
>  ****
>
> However, I don’t understand why using 8 or 16 processors should make such
> a difference.****
>
> ** **
>
> It sounds like you are computing a NaN somewhere, possibly your residual
> evaluation. However, we should****
>
> catch this when we evaluate the norm. Please turn on debugging in your
> build.****
>
> ** **
>
>    Matt****
>
>  ****
>
> Can anyone give me some help for the trouble shooting?****
>
>  ****
>
> Thanks,****
>
> Shuangshuang****
>
>  ****
>
>
>
> ****
>
> ** **
>
> --
> What most experimenters take for granted before they begin their
> experiments is infinitely more interesting than any results to which their
> experiments lead.
> -- Norbert Wiener ****
>



-- 
What most experimenters take for granted before they begin their
experiments is infinitely more interesting than any results to which their
experiments lead.
-- Norbert Wiener
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