OpenFOAM v1.6 & OpenMPI & functionObjects
 

Hello All,

I am moving my previous post from "OpenFOAM Running / Solving / CFD" since it seems to be a bug.

Even though i notice this bug in my real time test case, i also notice this in tutorial case of OpenFOAM, for example

CASE: tutorials/incompressible/simpleFoam/pitzDaily
COMMAND: mpirun -np 4 simpleFoam -parallel

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,

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).
--------------------------------------------------------------------------

Thanks

I pushed a fix to 1.6.x.

Thanks for reporting

Mattijs

Thanks mattijs,

It works !

Thanks

Hi,

It seems that the bug reported by Bruce is also present in OpenFOAM-1.5-dev (rev. 1758). In short, I have the same error message with a parallel case that uses functionObjects. The case runs fine in serial. Some more details :

- The simulation stops at the end of the second timestep (even if all residuals look good).

- The bug appeared when I switch the linear solvers (for "p" and "cellDisplacement") from PCG to GAMG.

- I started the simulation with PCG, waited a few timesteps, then switched to GAMG (without stopping the simulation) and the simulation seems to run correctly... for now...

- There is no problem with the parallel simulation if I don't use a functionObject (which is, of course, not an interesting option).

Thanks,

Mathieu

Hi again,

Please disregard my last post: it seems the problem is in a "home made" functionObject. Sorry about that.

Mathieu

Hi, I met the same error. Could you please recall what the reason for that error?

I am using a home made functionObjects too.

Thanks a lot.

Ok, I think MPI_BUFFER_SIZE is not enough for my case.

When I decrease the Nz, the grids points in the spanwise direction, everything works fine.


I am very confused:confused: