[ASAN] TestDQMServicesDemo tries to allocate 15 TB of RAM

[iarspider]

Log file: https://cmssdt.cern.ch/SDT/cgi-bin/logreader/slc7_amd64_gcc10/CMSSW_12_2_ASAN_X_2021-11-08-2300/unitTestLogs/DQMServices/Demo#/5920-5920

Error message:

+ cmsRun .../src/DQMServices/Demo/test/run_analyzers_cfg.py outfile=huge.root numberEventsInRun=300 numberEventsInLuminosityBlock=100 nEvents=600 nThreads=10 nConcurrent=2 howmany=1000 nolegacy=True
==20036==ERROR: AddressSanitizer failed to allocate 0xdfff0001000 (15392894357504) bytes at address 2008fff7000 (errno: 12)

[cmsbuild]

A new Issue was created by @iarspider .

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

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[iarspider]

assign dqm

[cmsbuild]

New categories assigned: dqm

@jfernan2,@ahmad3213,@rvenditti,@emanueleusai,@pbo0,@pmandrik you have been requested to review this Pull request/Issue and eventually sign? Thanks

[jfernan2]

Thanks @iarspider
I am not able to reproduce it, could you remind me of what should I set apart from using CMSSW_12_2_ASAN_X_2021-11-08-2300 ?

The error looks related to the setting ulimit -v 4000000 in:
https://github.com/cms-sw/cmssw/blob/master/DQMServices/Demo/test/runtests.sh#L85

Could you advise a better value which may work for ASAN?
Thank you

[jfernan2]

@iarspider removing the ulimit makes the test working, would this be acceptable for ASAN and non-ASAN releases? Thanks

[iarspider]

The entire test suite was originally added in 27dd907 by @schneiml , maybe he can comment?

[jfernan2]

I am afraid @schneiml is not working on CMS since more than a year
My question is more related to the way ASAN works, which I completely ignore. Has something changed in the ASAN side to produce this error in a script which was working previously?
Thanks

[jfernan2]

@iarspider I have created this PR to fix this crash and other UnitTest crashes in ASAN: #36269

[iarspider]

@jfernan2 thanks!

[jfernan2]

+1
Fixed in #36269

[cmsbuild]

This issue is fully signed and ready to be closed.