randomEngineStateProducer product not found in 140.0 and 150.0

[makortel]

In the latest IB CMSSW_11_2_X_2020-06-02-2300 the workflows 140.0 and 150.0 started to fail (they did not fail in an earlier IB so the failures are likely independent of #30074). The failure is

An exception of category 'ProductNotFound' occurred while
   [0] Calling EventProcessor::runToCompletion (which does almost everything after beginJob and before endJob)
Exception Message:
The RandomNumberGeneratorService is trying to restore
the state of the random engines by reading a product from
the LuminosityBlock with input tag "InputTag:  label = randomEngineStateProducer, instance = beginLumi, process = @skipCurrentProcess".
It could not find the product.
Either the product in the LuminosityBlock was dropped or
not produced or the configured input tag is incorrect or there is a bug somewhere

https://cmssdt.cern.ch/SDT/cgi-bin/logreader/slc7_amd64_gcc820/CMSSW_11_2_X_2020-06-02-2300/pyRelValMatrixLogs/run/150.0_HydjetQ_B12_5020GeV_2018+HydjetQ_B12_5020GeV_2018+DIGIHI2018+RECOHI2018+HARVESTHI2018/step3_HydjetQ_B12_5020GeV_2018+HydjetQ_B12_5020GeV_2018+DIGIHI2018+RECOHI2018+HARVESTHI2018.log#/

[cmsbuild]

A new Issue was created by @makortel Matti Kortelainen.

@Dr15Jones, @silviodonato, @dpiparo, @smuzaffar, @makortel can you please review it and eventually sign/assign? Thanks.

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[makortel]

From the PRs merged in CMSSW_11_2_X_2020-06-02-2300 the #29990 looks like a plausible candidate causing the failures by modifying HI event content, even if by quick look I did not see any changes related to IOMCRAW in the EventContentHeavyIons_cff.py though.

[makortel]

assign operations

[cmsbuild]

New categories assigned: operations

@fabiocos,@franzoni,@davidlange6,@silviodonato you have been requested to review this Pull request/Issue and eventually sign? Thanks

[perrotta]

Indeed I think the issue actually comes from #29990 , as you suspected.

IOMCRAW is included in the FEVTSIMEventContent; but then when:

FEVTSIMEventContent.outputCommands.extend(FEVTEventContent.outputCommands)

then the "drop *" statement at the beginning of FEVTEventContent now resets it

I try to prepare a fix

[perrotta]

assign reconstruction

[cmsbuild]

New categories assigned: reconstruction

@slava77,@perrotta you have been requested to review this Pull request/Issue and eventually sign? Thanks

[perrotta]

A fix is available in #30097

[makortel]

Thanks @perrotta!

[perrotta]

+1

• Fixed with Fix for the recently updated HI event content #30097