[A1n_d2n] [EXTERNAL] Re: Singularity path issue impacting analysis -- Reminder of /site, /apps outage on Tuesday

[Brad Sawatzky]

Just an FYI that the modified /apps/signularity/ paths were restored
by IT last night.  Things should be working again.

-- Brad

On Sun, 15 Nov 2020, Brad Sawatzky wrote:

> Hi Mingyu, et al,
> 
> It looks like there were some backwards-incompatible changes to
> /apps/singularity/ on Friday.  I think the relevant software is still
> there, but symlinks need to be made to allow existing code to work
> with the new configuration.
> 
> I'm CC'ing the group and Sylvester so we all have a heads-up.  I emailed
> the IT person in charge and asked that symlinks be restored for now
> (along with a reminder that notice of regressions should be given via
> scicomp-briefs in the future).  I expect that symlinks will be restored
> quickly.  I recommend that folks just wait until tomorrow rather than
> make local fixes.
> 
> FWIW, it looks like the new standard path will be
>   /apps/singularity/3.5.2
> instead of 
>   /apps/singularity/singularity-3.5.2
> It looks like IT is also moving towards using the 'module' system.  That
> is a good thing in the long run.
> 
> Sylvester may want to make the change to invoke the relevant IT module
> when he can, or wait a bit and see how this all settles out.
> 
> REMINDER:  I'll also take this opportunity to remind everyone of the
>   /apps and /site planned outage scheduled that starts Tuesday
>   afternoon.  This was posted to the scicomp-briefs list last week.
>   More details are here:
>     https://mailman.jlab.org/pipermail/jlab-scicomp-briefs/2020q4/000824.html
>   Hopefully there is nothing in particular you need to do, but do be
>   aware that may be a significant service disruption that evening.
> 
>   Note that I will be disabling the /site and /apps mountpoints on
>   the Hall C Cluster machines Monday night and restoring them on Wed
>   morning.  (Hopefully no one is analyzing on the Hall C machines
>   anymore though.)
> 
> -- Brad
> 
> On Sun, 15 Nov 2020, mingyu at jlab.org wrote:
> 
> > Hi Brad,
> > I encountered a strange problem with hallc_replay. Up to yestoday
> > (11/14/2020), both hallc replay and root works fine on JLab
> > ifarm. However, today after I load the PolHe3 software environment:
> > $ source /group/c-polhe3/software/setup.sh
> > when I do:
> > $ root -l
> > I get this message:
> > $ /group/c-polhe3/software/opt/hallac_container_1.8/bin/root: line 19:
> > /apps/singularity/singularity-3.5.2/bin/singularity: No such file or
> > directory
> > I am not sure what cause the missing file to prevent root run properly
> > after setting up the PolHe3 software environment, could you take a look?
> > Attached screen shot has the details of this problem.
> > Sincerely,
> > Mingyu Chen
> > 
> > 
> > 
> > > Hi folks,
> > >
> > > I meant to send this out earlier -- sorry for the delay.
> > >   https://hallcweb.jlab.org/wiki/index.php/Pol3He_Analyzer_Git_HowTo
> > >
> > > Murchhana kindly beta-tested the instructions for me, so I hope they
> > > work for everyone.  Do let me know if you hit problems or have
> > > questions.
> > >
> > > There are many ways to work with git.  The basic idea here is basically
> > > the same as the github 'fork and pull request' workflow.  That is
> > > outlined on the link above.  You can find more detailed descriptions at
> > > the 'Git Howto' page at the bottom of the above link, and/or skim
> > > this quick article.
> > >   https://urldefense.proofpoint.com/v2/url?u=https-3A__reflectoring.io_github-2Dfork-2Dand-2Dpull_&d=DwIBAg&c=CJqEzB1piLOyyvZjb8YUQw&r=BiQgYHr0DbfJNsNM2SdXVw&m=93UT7EtrBj6jOVABMQM4_gL_BDCQ8cTSqwmP_CW_O2g&s=NlYR6XMgfs3voaIbzu1M0OH3IJrBe6GizRagsp4woIQ&e= 
> > >
> > > (Note that we are using the ANL GitLab server and /not/ GitHub for our
> > > work.  Don't worry though, the process is basically the same.)
> > >
> > > -- Brad
> 
-- 
Brad Sawatzky, PhD <brads at jlab.org>  -<>-  Jefferson Lab / Hall C / C111
Ph: 757-269-5947  -<>-  Fax: 757-269-5235  -<>- Pager: brads-page at jlab.org
The most exciting phrase to hear in science, the one that heralds new
  discoveries, is not "Eureka!" but "That's funny..."   -- Isaac Asimov