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Midas DAQ System |
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Message ID: 2433
Entry time: 19 Aug 2022
Reply to this: 2436
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Author: |
Konstantin Olchanski |
Topic: |
Bug Fix |
Subject: |
"Detected duplicate or non-monotonous data" in history files |
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serious (but rare) bug was fixed in the history reader. unlucky experiment would see
errors about "Detected duplicate or non-monotonous data" in some history file, fixed by
removing/renaming the offending file. (reported by MEG experiment)
it turns out there was nothing wrong with the data files (good), but there
was a nasty bug in the history reader. it did not ensure that we read history
files in chronological order. under some conditions order of files could be
reversed, older files would be read after newer files and trip the built-in
protection against returning non-monotonically increasing history data to the user.
fixed commit
https://bitbucket.org/tmidas/midas/commits/9893f85ebe33e96cc63f501a0f89e1f8932c894d
for more details, see https://bitbucket.org/tmidas/midas/issues/350/file-history-non-
monotonic-time
K.O. |