[ale] After 15 years, Nohup is sttll broken???

[Scott Plante]

Well in the initial post, he said he already had a workaround. I assume
this is just a question of why isn't nohup doing what is claims to be meant
for.

On Wed, Jul 31, 2019 at 11:42 AM Raj Wurttemberg via Ale <ale at ale.org>
wrote:

> Why not just use screen or tmux?  Both allow you to reconnect to a
> disconnected session.
>
> Thanks,
> /Raj
>
> -----Original Message-----
> From: Ale <ale-bounces at ale.org> On Behalf Of Neal Rhodes via Ale
> Sent: Wednesday, July 31, 2019 10:04 AM
> To: ale at ale.org
> Subject: [ale] After 15 years, Nohup is sttll broken???
>
> So, about 15 years ago, when we were transitioning from SCO Unix to Linux,
> we noticed that nohup didn't work on long running Progress Database jobs.
>
> We would start an update job via nohup, leave, several hours later the ssh
> session would timeout, and at some point the job would get a hangup signal
> and die.  Which is sometimes really annoying if it's a 15 hour job.
>
> Our workaround at the time was a script, "mynohup":
>
> #!/bin/bash
> set -x
> echo "at `date` Starting: $* " >> mynohup.out echo "$*  >> mynohup.out " |
> at now set +x
>
> Which has worked flawlessly for 14.9 years.
>
> Now we are transitioning to new servers, running
> 2.6.32-696.30.1.el6.x86_64 #1 SMP Tue May 22 03:28:18 UTC 2018 x86_64
> x86_64 x86_64 GNU/Linux
>
> inside VMs, and we experienced some awkwardness with some admin UI which
> had
> Apache -> PHP -> sh -> sudo - adminuser -> mynohup something.
> Barfing up some messages about tty devices.   I thought of at least
> unwinding the old kluge.
>
> So, I thought, surely this has been fixed now, and tried running a job via
> nohup from an ssh session.
>
> Sure enough, at some point after leaving the office, the DB log shows....
>
> [2019/07/30 at 22:07:25.844-0500] P-28382  7: (562)   HANGUP signal
> received.
> [2019/07/30 at 22:07:25.847-0500] P-28382  7: (453)   Logout by neal on
> /dev/pts/4.
> [2019/07/30 at 22:07:28.241-0500] P-28439  8: (562)   HANGUP signal
> received.
> [2019/07/30 at 22:07:28.241-0500] P-28439  8: (453)   Logout by tdiadmin on
> batch.
>
> Wuh? The sole point of nohup is to not get a hangup, and ....????
>
> regards,
>
> Neal
>
> _______________________________________________
> Ale mailing list
> Ale at ale.org
> https://mail.ale.org/mailman/listinfo/ale
> See JOBS, ANNOUNCE and SCHOOLS lists at
> http://mail.ale.org/mailman/listinfo
>
> _______________________________________________
> Ale mailing list
> Ale at ale.org
> https://mail.ale.org/mailman/listinfo/ale
> See JOBS, ANNOUNCE and SCHOOLS lists at
> http://mail.ale.org/mailman/listinfo
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://mail.ale.org/pipermail/ale/attachments/20190731/2f8c541b/attachment.html>