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Re: [Star-tpc-l] fastoffline QA much lower iTPC hit densities than in the outer sectors

From: "Van Buren, Gene" <gene AT bnl.gov>
To: "Videbaek, Flemming" <videbaek AT bnl.gov>
Cc: Star-tpc L <Star-tpc-l AT lists.bnl.gov>
Subject: Re: [Star-tpc-l] fastoffline QA much lower iTPC hit densities than in the outer sectors
Date: Thu, 30 May 2024 19:38:49 +0000

Hi, all

I meant to bring this up at today's TPC meeting but forgot....sorry....

==> Problem: Some FastOffline jobs are seeing NO iTPC hits. There are many
more than 4 instances of jobs where the issue is seen, but perhaps 4 runs
where all (or nearly all) jobs saw it (I'm not sure of this count).

I spent a while looking into this the past couple days using a run from
Tuesday morning (25149018, though this is certainly not the only run in which
this is seen)... for which 3 of 21 st_physics jobs showed the issue and
established these notes:

- No correlation with time the file was processed (i.e. not the first jobs to
go through FastOffline....two if the problematic jobs started many hours
later)

- No correlation with database slave accessed

- No correlation with farm node on which the jobs ran

- When processing the first problematic job later on Tuesday myself, no
problem was seen....even though the other two problematic FastOffline jobs
started even later on Tuesday.

- Nothing in the log files of the problematic jobs reveal any differences of
note. The only database access that is different from the logs is accessing
iTPCSurvey for the good jobs, but I think that could be because the table is
never looked up when there are no iTPC hits that need it.

==> I do not have an explanation as to what is going on. Anyone?

-Gene

> On May 30, 2024, at 3:21 PM, videbaek via Star-tpc-l
> <Star-tpc-l AT lists.bnl.gov> wrote:
>
> Hi Gene,
>
> Do you understand why / how this can happen. It is certainly not visible in
> the online plots.
> Neither when I have looked in the QA generated from fast offline that I
> looked at.
> You mentioned this could be due to some missing/wrong DB information, but I
> dont understand why the
> iTPC should be effected only not both tpx and iTPC?
>
> Flemming
>
> There are now 4 instanties of this
>
>
> --
> Flemming Videbaek
> senior scientist, emeritus
> videbaek @ bnl.gov
> Brookhaven National Lab
> Physics Department
> Bldg 510D
> Upton, NY 11973
>
> phone: 631-344-4106
> cell : 631-681-1596
> _______________________________________________
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[Star-tpc-l] fastoffline QA much lower iTPC hit densities than in the outer sectors, videbaek, 05/30/2024
- Re: [Star-tpc-l] fastoffline QA much lower iTPC hit densities than in the outer sectors, Van Buren, Gene, 05/30/2024
  - Re: [Star-tpc-l] fastoffline QA much lower iTPC hit densities than in the outer sectors, videbaek, 05/30/2024
    - Re: [Star-tpc-l] fastoffline QA much lower iTPC hit densities than in the outer sectors, Van Buren, Gene, 05/30/2024
      - Re: [Star-tpc-l] fastoffline QA much lower iTPC hit densities than in the outer sectors, videbaek, 05/30/2024
        
        Re: [Star-tpc-l] fastoffline QA much lower iTPC hit densities than in the outer sectors, Van Buren, Gene, 05/30/2024
        
        Re: [Star-tpc-l] fastoffline QA much lower iTPC hit densities than in the outer sectors, Van Buren, Gene, 05/31/2024
        
        Re: [Star-tpc-l] fastoffline QA much lower iTPC hit densities than in the outer sectors, Van Buren, Gene, 05/31/2024
  - Re: [Star-tpc-l] fastoffline QA much lower iTPC hit densities than in the outer sectors, videbaek, 05/30/2024