Reading Certification JSON from cvmfs in das-up-to-nevents.py

[AdrianoDee]

PR description:

Taking the comment #49020 (comment) by @gabrielmscampos, this PR proposes to allow das-up-to-nevents.py to look for the json certification on cvmfs. This would supersede #49020 solving the same issue:

Lately (with #48490), spurious DAS errors appear frequently in the tests (see e.g. #49014 (comment)). This is due to random glitches in accessing https://cms-service-dqmdc.web.cern.ch/CAF/certification/ when running the tests (no access to EOS is available). This results in not finding any certification JSON files to use for skimming the datasets.

PR validation:

Running the standard tests.

[cmsbuild]

cms-bot internal usage

[cmsbuild]

+code-checks

Logs: https://cmssdt.cern.ch/SDT/code-checks/cms-sw-PR-49051/46274

• There are other open Pull requests which might conflict with changes you have proposed:
  • File Configuration/PyReleaseValidation/scripts/das-up-to-nevents.py modified in PR(s): Simplify Data Workflows in Tests (No JSON Check) #49020, Minor improvements to das-up-to-nevents.py #49045

[cmsbuild]

A new Pull Request was created by @AdrianoDee for master.

It involves the following packages:

• Configuration/PyReleaseValidation (upgrade, pdmv)

@AdrianoDee, @DickyChant, @Moanwar, @antoniovagnerini, @cmsbuild, @miquork, @srimanob, @subirsarkar can you please review it and eventually sign? Thanks.
@Martin-Grunewald, @fabiocos, @makortel, @slomeo 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

[AdrianoDee]

please test

[cmsbuild]

+1

Size: This PR adds an extra 24KB to repository
Summary: https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-7aa88d/48433/summary.html
COMMIT: e14b237
CMSSW: CMSSW_16_0_X_2025-10-02-1100/el8_amd64_gcc13
User test area: For local testing, you can use /cvmfs/cms-ci.cern.ch/week1/cms-sw/cmssw/49051/48433/install.sh to create a dev area with all the needed externals and cmssw changes.

Comparison Summary

Summary:

• You potentially added 2 lines to the logs
• Reco comparison results: 4 differences found in the comparisons
• DQMHistoTests: Total files compared: 51
• DQMHistoTests: Total histograms compared: 3924341
• DQMHistoTests: Total failures: 56
• DQMHistoTests: Total nulls: 0
• DQMHistoTests: Total successes: 3924265
• DQMHistoTests: Total skipped: 20
• DQMHistoTests: Total Missing objects: 0
• DQMHistoSizes: Histogram memory added: 0.0 KiB( 50 files compared)
• Checked 218 log files, 188 edm output root files, 51 DQM output files
• TriggerResults: no differences found

[AdrianoDee]

+pdmv

[mandrenguyen]

+1

[mandrenguyen]

merge