[aspect-devel] Error on running subduction models

[Timo Heister]

Mengxue,

this is an error that happened during parallel I/O in the graphical
output. This can have several reasons:
- you are running out of disk space
- the file system you are writing to is not usable for parallel IO
(most clusters have a slow home directory on NSF and a fast parallel
filesystem for I/O)
- something else, like your MPI does not support MPI I/O.

Things to try:
- You can try to run one of the cookbooks in parallel and see if
graphical output works.
- You can change the output directory.
- You can change the "Number of grouped files" to 0 to see if output
works without using parallel I/O.

On Thu, Sep 27, 2018 at 11:38 AM mxliu <mxliu at math.tsinghua.edu.cn> wrote:
>
> Hi all,
> I'm now running a subduction model with aspect-2.0(dealii-9.0), I set Nonlinear solver tolerance = 1e-3, it seems to converge on timestep 0(on 3 levels), however, it failed to do with Postprocessing, here is part of the error message:
>
> .......
>
> Number of active cells: 124,000 (on 3 levels)
> Number of degrees of freedom: 5,116,081 (998,182+125,171+499,091+499,091+499,091+499,091+499,091+499,091+499,091+499,091)
>
> Number of free surface degrees of freedom: 250342
> *** Timestep 0:  t=0 years
>    Solving mesh velocity system... 0 iterations.
>    Solving temperature system... 0 iterations.
>    Solving ContinentalUpperCrust system ... 0 iterations.
>    Solving ContinentalLowerCrust system ... 0 iterations.
>    Solving ContinentalMantle system ... 0 iterations.
>    Solving Sediment system ... 0 iterations.
>    Solving OceanicCrust system ... 0 iterations.
>    Solving OceanicMantle system ... 0 iterations.
>    Solving WeakZone system ... 0 iterations.
>    Rebuilding Stokes preconditioner...
>    Solving Stokes system... 200+9 iterations.
>       Relative nonlinear residual (Stokes system) after nonlinear iteration 1: 1
>
>    Rebuilding Stokes preconditioner...
>    Solving Stokes system... 200+12 iterations.
>       Relative nonlinear residual (Stokes system) after nonlinear iteration 2: 0.00559706
> ......
>
>    Rebuilding Stokes preconditioner...
>    Solving Stokes system... 200+3 iterations.
>       Relative nonlinear residual (Stokes system) after nonlinear iteration 28: 0.000800572
>
>
>    Postprocessing:
>
>
> ----------------------------------------------------
> Exception on MPI process <16> while running postprocessor <N6aspect11Postprocess13VisualizationILi2EEE>:
>
>
> ----------------------------------------------------
> Exception on MPI process <19> while running postprocessor <N6aspect11Postprocess13VisualizationILi2EEE>:
>
> --------------------------------------------------------
> An error occurred in line <6632> of file </home/mgxliu/software/dealii/dealii-9.0/dealii-9.0.0/source/base/data_out_base.cc> in function
>     void dealii::DataOutInterface<dim, spacedim>::write_vtu_in_parallel(const char*, MPI_Comm) const [with int dim = 2; int spacedim = 2; MPI_Comm = ompi_communicator_t*]
> The violated condition was:
>     ierr == MPI_SUCCESS
> Additional information:
> deal.II encountered an error while calling an MPI function.
> The description of the error provided by MPI is "MPI_ERR_OTHER: known error not in list".
> The numerical value of the original error code is 16.
> --------------------------------------------------------
>
> Aborting!
> ----------------------------------------------------
>
> Any ideas on how this might be solved? Thanks in advance.
>
> Cheers,
> Mengxue
>
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-- 
Timo Heister
http://www.math.clemson.edu/~heister/