CFD Online Discussion Forums - Effects on fvSolution file on calling mpi run

I'm getting different behaviors while rereading fvSolution file using mpirun and without using it.

I modified my fvSolution.H file and added a fvSolution.C (also added it to Make)

fvSolution.C

Code:

bool::Foam::fvSolution::read() {

  Info << "fvSolution rereading" << endl;

  return solution::read();

}

fvSolution.H (I override the read() method)

Code:

public:

  virtual bool read();

from my shell I run the tutorial in:
tutorials/heatTransfer/buoyantBoussinesqSimpleFoam/hotRoom

1. sequential run: (without mpi)

Code:

./Allrun &

echo " " >> fvSolution # this just puts a blank line at the end of fvSolution, causing it to be reread

when I check the log, I see "fvSolution rereading" inside it, as expected.

2. mpi parallel run

Code:

./Allrun.par&

mpirun -np 4 buoyantBoussinesqSimpleFoam -parallel > log.bbsf &

echo " " >> fvSolution

but the log.bbsf contains no "fvSolution rereading" in it.

How can I explain that behavior ? (I use OpenFoam 2.3.x version, if that matters at all)
This doesn't make any sense to me.

Allrun.par is just a tailored version of Allrun.

Code:

#!/bin/sh

cd ${0%/*} || exit 1    # run from this directory



# Source tutorial run functions

. $WM_PROJECT_DIR/bin/tools/RunFunctions



application=`getApplication`



runApplication blockMesh

cp 0/T.org 0/T

runApplication setFields

runApplication decomposePar

# runApplication $application

# runApplication mpirun -np 4 $application -parallel 

# ----------------------------------------------------------------- end-of-file