[BUG] openfoam_wf fails on the combine_output step

[papajim]

🐛 Bug Report

Describe the bug The openfoam_wf fails on the combine_output step and subsequently on the learn step as well.

To Reproduce Steps to reproduce the behavior:

1. docker pull cfdengine/openfoam
2. merlin example openfoam_wf
3. cd openfoam_wf
4. merlin run openfoam_wf_template.yaml
5. See error in combine_outputs.err

''' U = np.array(U).reshape(len(dir_names), num_of_timesteps, resolution, 3) ValueError: cannot reshape array of size 6451200 into shape (100,10,400,3) ''''

Expected behavior The openfoam_wf should finish successfully with no errors.

Screenshots If applicable, add screenshots to help explain your problem.

Please answer these questions to help us pinpoint the problem

• Does the problem occur in merlin run --local mode, distributed mode or neither?
• If a distributed problem, which backend and queue servers are you using? How are they configured?
• On what machines/architectures are you running merlin? Is this bug on a specific machine or can you reproduce it elsewhere?

Please run merlin info and paste the results here:

Additional context Add any other context about the problem here.

[lucpeterson]

@ymubarka can you take a look at this?

[ymubarka]

@papajim I just got the same issue when running with a higher concurrency than the number of cores I had. The issue here is that some docker containers are getting the same name. Try setting the concurrency for simworkers to be the same as the of cores on your cpu

[ben-bay]

@ymubarka is this now fixed?