The OPAL Discussion Forum

["Snuverink Jochem (PSI)" <jochem.snuverink AT psi.ch>]

Dear Philippe,

Thanks for the example and reporting.

This is likely related to what Finn O'Shea reported as well with the optimizer (the sampler and the optimizer are very related in terms of code).  If that is the case then it might not happen all the time and you can perhaps try to rerun.

We have opened an issue and will continue following up there.

https://gitlab.psi.ch/OPAL/src/issues/557

Best wishes,

Jochem

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From: opal-request AT lists.psi.ch <opal-request AT lists.psi.ch> on behalf of Philippe Piot <piot AT nicadd.niu.edu>
Sent: Friday, July 10, 2020 2:46:55 PM
To: opal
Subject: [Opal] opal sampler hangs

 

Dear All,

  I recently installed opal on a fedora32 laptop and the sampler feature does not work anymore. It starts fine but then hangs. The same example used not to hang in the previous versions of this OS. 

  I am attaching the stdout output and my input file (.tmpl, .in, and .data) in case somebody see an obvious mistake. The pilotTrace file clearly states the jobs (0 to 10) are all finished consistent with my scanning over 11 points. I run opal via the command

  mpirun --mca btl ^uct /home/piot/Simulations/OPAL/opal/build/src/opal

  The input file works fine alone (without attempting to do any scan). 

   Thank you for any suggestions! All the best, -- Philippe. 

Philippe Piot,
https://www.niu.edu/advanced-accelerator-randd/
Northern Illinois University, Dept of Physics and
Northern Illinois Center for Accelerator & Detector Development
DeKalb, IL 60115, USA
Tel: 815 753 6473, Web:  http://www.physics.niu.edu/physics/

Argonne National Laboratory, Advanced Photon Source
Accelerator System Division

Lemont, IL 60439, USA

Tel: 630 252 2415, Web:  https://www.aps.anl.gov/Accelerator-Systems-Division