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MPIrun Problem with FoamJob Workaround

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Old   March 22, 2016, 15:01
Default MPIrun Problem with FoamJob Workaround
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Katherine
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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!
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Old   August 31, 2018, 10:33
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Foad
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On a side note the

Code:
foamJob -parallel simpleFoam
automatically creates a log file in the case folder. no need for "> log &" part
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Old   September 1, 2018, 04:45
Default error in proccessing, mpirun error
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ceren cilavdaroğlu
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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



thanks
Ceren.
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Old   October 4, 2018, 12:55
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Hüseyin Can Önel
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Quote:
Originally Posted by ceren View Post
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?
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