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Old   August 6, 2009, 03:58
Default OpenFOAM v1.6 & OpenMPI & functionObjects
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bruce
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Hello All,

I run a case parallel with "functionObjects" in controlDict in OpenFOAM Version 1.6.
I use pre compiled OpenFOAM1.6 & openmpi versions.

- case runs fine in single processor with "functionObjects"
- case runs fine in parallel multiple processor without "functionObjects"

The problem is case do not run with "functionObjects" in parallel !!! So i get an run time error.

Here is the content of the functionObjects i use in controlDict file,

functions
{
fieldMinMax
{
type fieldMinMax;
functionObjectLibs ("libfieldFunctionObjects.so");
log yes;
outputControl timeStep;
outputInterval 1;
mode magnitude;
fields
(
U
p
);
}
}


Here is an error output from simpleFoam solver,
Time = 1

smoothSolver: Solving for Ux, Initial residual = 0.000858153, Final residual = 4.80409e-05, No Iterations 4
smoothSolver: Solving for Uy, Initial residual = 0.00247583, Final residual = 0.000145901, No Iterations 4
smoothSolver: Solving for Uz, Initial residual = 0.00376188, Final residual = 0.000214772, No Iterations 4
GAMG: Solving for p, Initial residual = 0.140115, Final residual = 0.0044083, No Iterations 2
time step continuity errors : sum local = 0.0024423, global = -1.95703e-05, cumulative = -1.95703e-05
smoothSolver: Solving for omega, Initial residual = 0.000519947, Final residual = 2.3265e-05, No Iterations 3
smoothSolver: Solving for k, Initial residual = 0.00221736, Final residual = 9.98441e-05, No Iterations 3
ExecutionTime = 46.25 s ClockTime = 47 s

[cfd4:17702] *** An error occurred in MPI_Recv
[cfd4:17702] *** on communicator MPI_COMM_WORLD
[cfd4:17702] *** MPI_ERR_TRUNCATE: message truncated
[cfd4:17702] *** MPI_ERRORS_ARE_FATAL (your MPI job will now abort)
--------------------------------------------------------------------------
mpirun has exited due to process rank 0 with PID 17702 on
node cfd4 exiting without calling "finalize". This may
have caused other processes in the application to be
terminated by signals sent by mpirun (as reported here).
--------------------------------------------------------------------------

For information, MPI_BUFFER_SIZE=20000000
So it seems OpenMPI crashes calling function{} !?

I am glad to provide necessary information to debug the problem.

Thanks
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Old   August 7, 2009, 13:15
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Mattijs Janssens
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Can you report a bug in the OpenFOAM-bugs section?
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