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Nohup command doesn't stop an Optistruct Job from receiving SIGHUP

Hello, I have access to a linux compute server that I connect to using ssh.

When I launch an optistruct job, I want to be able to exit the command line or turn off the laptop without killing the job on the server.

I tried "nohup" with "&" but the job still ends up receiving SIGHUP.

Also tried running it as usual then pausing it with Ctrl+Z then putting it in the background with "bg" then disowning it with "disown -h". And it still ends up stopping (eventhough with this method it just stops without printing SIGHUP in the out file).

Any ideas on how to solve this ? Thank you

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OptiStruct

v2022

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loistf

I have used nohup via putty succesfully in the past. Not sure what might be happening in your case. Maybe something in your ssh client settings? Not sure that with that information it is possible to get to the bottom of it, unless you are able to provide details on how to reproduce, sorry.

Fadi Chamoun_21158

I have used nohup via putty succesfully in the past. Not sure what might be happening in your case. Maybe something in your ssh client settings? Not sure that with that information it is possible to get to the bottom of it, unless you are able to provide details on how to reproduce, sorry.

After some investigations, i noticed that multiple processes are created, and only one is protected from SIGHUP.

Haven't figured out yet how to protect the others yet.

loistf

After some investigations, i noticed that multiple processes are created, and only one is protected from SIGHUP.

Haven't figured out yet how to protect the others yet.

what is the command that you execute, if i may ask?

Fadi Chamoun_21158

what is the command that you execute, if i may ask?

yes it's:

nohup /data/environnement/altair/2022/altair/scripts/optistruct -core in -nt 16 Model.fem &

loistf

yes it's:

nohup /data/environnement/altair/2022/altair/scripts/optistruct -core in -nt 16 Model.fem &

Seems similar to what I remember using in the past. There is something said about child processes in this link, but I am not sure how it applies to your case.

linux - What's the difference between nohup and ampersand - Stack Overflow

If it is only for this it might be an overkill, but you might be interested in PBS (commercial or open source)

Industry-leading Workload Manager and Job Scheduler for HPC | Altair PBS Professional

OpenPBS Open Source Project

What do you see in your OptiStruct out file?