CFD Online Discussion Forums - MPIrun Problem with FoamJob Workaround

CFD Online Discussion Forums (https://www.cfd-online.com/Forums/)

- OpenFOAM Running, Solving & CFD (https://www.cfd-online.com/Forums/openfoam-solving/)

- - MPIrun Problem with FoamJob Workaround (https://www.cfd-online.com/Forums/openfoam-solving/168462-mpirun-problem-foamjob-workaround.html)

MPIrun Problem with FoamJob Workaround

Hi,

I am having some issues with trying to use mpirun with simpleFoam that I would appreciate some help with. The setup of my problem is flow over a cylinder with a diameter of 1 meter (u_x = 1 m/s), and I am using the simpleFoam solver. My problem is that when I try to run the case in parallel using the command:

Code:

mpirun -np (# of processors) simpleFoam -parallel > log &

OpenFOAM does not run and returns the error:

Code:

mpirun noticed that the job aborted, but has no info as to the process

that caused that situation.

As a work around, I have been able to run the case in parallel by replacing mpirun with foamJob; after executing decomposePar, I run the case using the following command:

Code:

foamJob -parallel simpleFoam > log &

and OpenFOAM has no problem with this.

I am a relatively new user to OpenFOAM, so I am really curious why mpirun is not able to run my case in parallel, but foamJob can. I went through the damBreak tutorial and I had the same problem with mpirun that I am having with my cylinder flow case. I am really curious if anyone else has ran into this problem and used foamJob instead of mpirun to run a case in parallel.

Thank you in advance for your time!

On a side note the

Code:

foamJob -parallel simpleFoam

automatically creates a log file in the case folder. no need for "> log &" part

error in proccessing, mpirun error

hi,

this is my first time. i made weirOwerflow. i made blockmeshDict without errror. i am on the processes part.

I wrote the "decomposePar" and created the processors and
when I write "mpirun -np 4 interFoam -parallel >log&"

Code:

--> FOAM FATAL IO ERROR: 

[2] cannot find file

[2] 

[2] file: /home/ceren/weirOverflow/processor2/0/p_rgh at line 0.

[2] 

[0] 

[0] 

[0] --> FOAM FATAL IO ERROR: 

[0] cannot find file

[0] 

[0] file: /home/ceren/weirOverflow/processor0/0/p_rgh at line 0.

[0] 

[0]     From function regIOobject::readStream()

[0]     in file db/regIOobject/regIOobjectRead.C at line 72.

[0] 

FOAM parallel run exiting

what is the wrong? please help me.
i am the beginner :rolleyes:

thanks
Ceren.

Quote:

Originally Posted by ceren (Post 704930)

Code:

--> FOAM FATAL IO ERROR: 

[2] cannot find file

[2] 

[2] file: /home/ceren/weirOverflow/processor2/0/p_rgh at line 0.

[2] 

[0] 

[0] 

[0] --> FOAM FATAL IO ERROR: 

[0] cannot find file

[0] 

[0] file: /home/ceren/weirOverflow/processor0/0/p_rgh at line 0.

[0] 

[0]     From function regIOobject::readStream()

[0]     in file db/regIOobject/regIOobjectRead.C at line 72.

[0] 

FOAM parallel run exiting

Not sure what kind of a bash script you are using to run the case but a necessary p_rgh file is not found in the decomposed directories. Do you have that file in your case directories before running anything in the first place?