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[videbaek <videbaek AT bnl.gov>]

Sorry Gene,
I overlooked your line on farm node.

F

On 2024-05-30 15:38, Van Buren, Gene wrote:
> 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
> > _______________________________________________
> > Star-tpc-l mailing list
> > Star-tpc-l AT lists.bnl.gov
> > https://lists.bnl.gov/mailman/listinfo/star-tpc-l

--
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