cmssw: DQMOnlineClient-beam_dqm_sourceclient error

In CMSSW_11_2_X_2020-10-21-2300, a unit test from DQM/Integration is failing. This was already reported in some PR test (see https://github.com/cms-sw/cmssw/pull/31654#issuecomment-713632176) :

https://github.com/cms-sw/cmssw/pull/32135#issuecomment-726882729 https://github.com/cms-sw/cmssw/pull/32036#issuecomment-734247790 https://github.com/cms-sw/cmssw/pull/31765#issuecomment-714579386 https://github.com/cms-sw/cmssw/pull/31871#issuecomment-712842811 https://github.com/cms-sw/cmssw/pull/31699#issuecomment-709574276 https://github.com/cms-sw/cmssw/pull/31689#issuecomment-709574251 https://github.com/cms-sw/cmssw/pull/31654#issuecomment-713632176 https://github.com/cms-sw/cmssw/pull/31206#issuecomment-727890303 https://github.com/cms-sw/cmssw/pull/27983#issuecomment-734334965

https://cmssdt.cern.ch/SDT/cgi-bin/logreader/cc8_amd64_gcc8/CMSSW_11_2_X_2020-10-21-2300/unitTestLogs/DQM/Integration#/

===== Test "TestDQMOnlineClient-beam_dqm_sourceclient" ====
+ [[ 1 -eq 0 ]]
+ [[ -z '' ]]
+ LOCAL_TEST_DIR=.
+ [[ -z '' ]]
+ CLIENTS_DIR=./src/DQM/Integration/python/clients
+ mkdir -p ./upload
+ cmsRun ./src/DQM/Integration/python/clients/beam_dqm_sourceclient-live_cfg.py unitTest=True
Querying DAS for files...
the query is file run=334393 dataset=/ExpressCosmics/Commissioning2019-Express-v1/FEVT lumi=1
DAS succeeded after 1 attempts 0
found files:  ['/store/express/Commissioning2019/ExpressCosmics/FEVT/Express-v1/000/334/393/00000/D0F052ED-9CA5-F547-BA73-2AA370D51AE8.root']
edmFileUtil --catalog file:/cvmfs/cms-ib.cern.ch/SITECONF/local/PhEDEx/storage.xml?protocol=xrootd --events /store/express/Commissioning2019/ExpressCosmics/FEVT/Express-v1/000/334/393/00000/D0F052ED-9CA5-F547-BA73-2AA370D51AE8.root | tail -n +9 | head -n -5 | awk '{ print $3 }'
the query is file run=334393 dataset=/ExpressCosmics/Commissioning2019-Express-v1/FEVT lumi=2
DAS succeeded after 1 attempts 0
found files:  ['/store/express/Commissioning2019/ExpressCosmics/FEVT/Express-v1/000/334/393/00000/FE21789A-F777-0B43-A1F5-E43F1FD52D19.root']
edmFileUtil --catalog file:/cvmfs/cms-ib.cern.ch/SITECONF/local/PhEDEx/storage.xml?protocol=xrootd --events /store/express/Commissioning2019/ExpressCosmics/FEVT/Express-v1/000/334/393/00000/FE21789A-F777-0B43-A1F5-E43F1FD52D19.root | tail -n +9 | head -n -5 | awk '{ print $3 }'
Got 2 files.
Loaded configuration file from: []
dqmRunConfig: cms.PSet(
    collectorHost = cms.untracked.string('127.0.0.1'),
    collectorPort = cms.untracked.int32(9190),
    type = cms.untracked.string('userarea')
)
Monitoring file not found, disabling.
22-Oct-2020 03:38:39 CEST  Initiating request to open file root://eoscms.cern.ch//eos/cms/store/user/cmsbuild/store/express/Commissioning2019/ExpressCosmics/FEVT/Express-v1/000/334/393/00000/D0F052ED-9CA5-F547-BA73-2AA370D51AE8.root
%MSG-w XrdAdaptor:  file_open 22-Oct-2020 03:38:42 CEST pre-events
Data is served from cern.ch instead of original site eoscms
%MSG
22-Oct-2020 03:38:43 CEST  Successfully opened file root://eoscms.cern.ch//eos/cms/store/user/cmsbuild/store/express/Commissioning2019/ExpressCosmics/FEVT/Express-v1/000/334/393/00000/D0F052ED-9CA5-F547-BA73-2AA370D51AE8.root
%MSG-w SiStripRawToDigi:  SiStripRawToDigiModule:siStripDigis  22-Oct-2020 03:38:57 CEST Run: 334393 Event: 16285
NULL pointer to FEDRawData for FED: id 114
Note: further warnings of this type will be suppressed (this can be changed by enabling debugging printout)
%MSG
22-Oct-2020 03:39:03 CEST  Closed file root://eoscms.cern.ch//eos/cms/store/user/cmsbuild/store/express/Commissioning2019/ExpressCosmics/FEVT/Express-v1/000/334/393/00000/D0F052ED-9CA5-F547-BA73-2AA370D51AE8.root
22-Oct-2020 03:39:03 CEST  Initiating request to open file root://eoscms.cern.ch//eos/cms/store/user/cmsbuild/store/express/Commissioning2019/ExpressCosmics/FEVT/Express-v1/000/334/393/00000/FE21789A-F777-0B43-A1F5-E43F1FD52D19.root
%MSG-w XrdAdaptor:  file_open 22-Oct-2020 03:39:05 CEST PostProcessEvent
Data is served from cern.ch instead of original site eoscms
%MSG
22-Oct-2020 03:39:05 CEST  Successfully opened file root://eoscms.cern.ch//eos/cms/store/user/cmsbuild/store/express/Commissioning2019/ExpressCosmics/FEVT/Express-v1/000/334/393/00000/FE21789A-F777-0B43-A1F5-E43F1FD52D19.root