Issue exception for ROOT file forward incompatiblity problem [12_6]

[Dr15Jones]

PR description:

Throw an exception if the ParameterSet parsing finds an unknown entry type. This problem is occurring presently in older releases if they try to read files which contain the new string encoding for ParameterSets.

PR validation:

This same code was tested in CMSSW_12_6 and properly throws the proper exception type containing the proper information when reading a file generated in CMSSW_13_3.

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:

backport of #43894 . This change is needed by all open releases before we changed the string encoding done in ParameterSets in CMSSW_13_3 in order to give meaningful error messages when trying to read a file from a newer release.

fixed cms-sw/framework-team#804

[cmsbuild]

A new Pull Request was created by @Dr15Jones (Chris Jones) for CMSSW_12_6_X.

It involves the following packages:

• FWCore/ParameterSet (core)
• IOPool/Input (core)

@cmsbuild, @smuzaffar, @Dr15Jones, @makortel can you please review it and eventually sign? Thanks.
@wddgit, @missirol, @makortel this is something you requested to watch as well.
@sextonkennedy, @antoniovilela, @rappoccio you are the release manager for this.

cms-bot commands are listed here

[cmsbuild]

cms-bot internal usage

[Dr15Jones]

please test

[cmsbuild]

+1

Summary: https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-ced4f2/37280/summary.html
COMMIT: ddfdd27
CMSSW: CMSSW_12_6_X_2024-02-04-0000/el8_amd64_gcc10
User test area: For local testing, you can use /cvmfs/cms-ci.cern.ch/week1/cms-sw/cmssw/43895/37280/install.sh to create a dev area with all the needed externals and cmssw changes.

Comparison Summary

Summary:

• You potentially added 7 lines to the logs
• Reco comparison results: 7 differences found in the comparisons
• DQMHistoTests: Total files compared: 48
• DQMHistoTests: Total histograms compared: 3460777
• DQMHistoTests: Total failures: 6
• DQMHistoTests: Total nulls: 0
• DQMHistoTests: Total successes: 3460749
• DQMHistoTests: Total skipped: 22
• DQMHistoTests: Total Missing objects: 0
• DQMHistoSizes: Histogram memory added: 0.0 KiB( 47 files compared)
• Checked 206 log files, 158 edm output root files, 48 DQM output files
• TriggerResults: no differences found

[makortel]

+core

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next CMSSW_12_6_X IBs (tests are also fine) and once validation in the development release cycle CMSSW_14_1_X is complete. This pull request will now be reviewed by the release team before it's merged. @antoniovilela, @rappoccio, @sextonkennedy (and backports should be raised in the release meeting by the corresponding L2)

[antoniovilela]

+1