[15.0.X] Fixing minor error in Scouting DQM module

[jprendi]

backport of #48789

PR description:

@mmusich noticed an error in the way the primaryVertex_counter is initialised within the code. The way it was until now, the counter does to not get updated for each event separately. The fix starts and sets the counter to 0 each over each event.

PR validation:

Using input files set at cms-data/DQM-Integration#12 by coping inside the DQM/Integration/data/run392642 folder and running:

cmsRun DQM/Integration/python/clients/scouting_dqm_sourceclient-live_cfg.py runInputDir=DQM/Integration/data/ runNumber=392642 scanOnce=True

followed by subsequent inspection of the output histograms.

If this PR is a backport please specify the original PR and why you need to backport that PR. If this PR will be backported please specify to which release cycle the backport is meant for:

Verbatim backport of #48789 for 2025 data-taking operations

[cmsbuild]

Pull request #48790 was updated.

[cmsbuild]

cms-bot internal usage

[cmsbuild]

A new Pull Request was created by @jprendi for CMSSW_15_0_X.

It involves the following packages:

• DQM/HLTEvF (dqm, hlt)

@Martin-Grunewald, @antoniovagnerini, @cmsbuild, @ctarricone, @mmusich, @rseidita can you please review it and eventually sign? Thanks.
@missirol, @mmusich, @mtosi this is something you requested to watch as well.
@ftenchini, @mandrenguyen, @sextonkennedy you are the release manager for this.

cms-bot commands are listed here

• Backported from Fixing minor error in Scouting DQM module #48789

[mmusich]

test parameters:

• addpkg = DQM/Integration

[mmusich]

@cmsbuild, please test

[mmusich]

type bug-fix

[cmsbuild]

+1

Size: This PR adds an extra 32KB to repository
Summary: https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-eb64e2/47843/summary.html
COMMIT: b7ba2f8
CMSSW: CMSSW_15_0_X_2025-08-25-1100/el8_amd64_gcc12
User test area: For local testing, you can use /cvmfs/cms-ci.cern.ch/week0/cms-sw/cmssw/48790/47843/install.sh to create a dev area with all the needed externals and cmssw changes.

Comparison Summary

Summary:

• You potentially added 4 lines to the logs
• Reco comparison results: 8 differences found in the comparisons
• DQMHistoTests: Total files compared: 50
• DQMHistoTests: Total histograms compared: 4020932
• DQMHistoTests: Total failures: 72
• DQMHistoTests: Total nulls: 0
• DQMHistoTests: Total successes: 4020840
• DQMHistoTests: Total skipped: 20
• DQMHistoTests: Total Missing objects: 0
• DQMHistoSizes: Histogram memory added: 0.0 KiB( 49 files compared)
• Checked 218 log files, 189 edm output root files, 50 DQM output files
• TriggerResults: no differences found

[mmusich]

+hlt

[antoniovagnerini]

+dqm

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next CMSSW_15_0_X IBs (tests are also fine) and once validation in the development release cycle CMSSW_15_1_X is complete. This pull request will now be reviewed by the release team before it's merged. @sextonkennedy, @ftenchini, @mandrenguyen (and backports should be raised in the release meeting by the corresponding L2)

[mandrenguyen]

+1