 08 Dec 2025, Konstantin Olchanski, Suggestion, Get manalyzer to configure midas::odb when running offline
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> > #include "manalyzer.h"
> > #include "midasio.h"
> > +#include "odbxx.h"
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08 Dec 2025, Konstantin Olchanski, Suggestion, manalyzer root output file with custom filename including run number
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I updated the root helper constructor to give the user more control over ROOT output file names.
You can now change it to anything you want in the module run constructor, see manalyzer_example_esoteric.cxx
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09 Dec 2025, Konstantin Olchanski, Bug Report, manalyzer fails to compile on some systems because of missing #include <cmath>
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> /code/midas/manalyzer/manalyzer.cxx:799:27: error: ‘pow’ was not declared in this scope
> 799 | bins[i] = TimeRange*pow(1.1,i)/pow(1.1,Nbins);
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09 Dec 2025, Konstantin Olchanski, Bug Report, odbxx memory leak with JSON ODB dump
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> Thanks for reporting this. It was caused by a
>
> MJsonNode* node = MJsonNode::Parse(str.c_str());
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11 Dec 2025, Konstantin Olchanski, Bug Report, odbxx memory leak with JSON ODB dump
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> > BTW, it looks like we are parsing the whole JSON ODB dump (200k+) on every odbxx access. Can you parse it just once?
> You are right. I changed the code so that the dump is only parsed once. Please give it a try.
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11 Dec 2025, Konstantin Olchanski, Bug Report, manalyzer fails to compile on some systems because of missing #include <cmath>
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> TFile.h -> TDirectoryFile.h -> TDirectory.h -> TNamed.h -> TString.h -> TMathBase.h -> cmath -> math.h
reading ROOT release notes, 6.38 removed TMathBase.h from TString.h, with a warning "This change may cause errors during compilation of
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12 Dec 2025, Konstantin Olchanski, Bug Report, odbxx memory leak with JSON ODB dump
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> > Confirmed fixed, thanks! There are 2 small changes I made in odbxx.h, please pull.
> There was one missing enable_jsroot in manalyzer, please pull yourself.
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 05 Feb 2026, Konstantin Olchanski, Bug Report, omnibus bugs from running DarkLight
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We finished running the DarkLight experiment and I am reporting accumulated bugs that we have run into.
1) history plots on 12 hrs, 24 hrs tend to hang with "page not responsive". most plots have 16-20 variables,
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16 Apr 2026, Konstantin Olchanski, Forum, Migrate Legacy code to current Midas version
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> I am migrating the full CRIPT muon tomography detector from MIDAS (SVN Rev.
> 5238, circa 2012) to a more modern release.
> The current system runs on Scientific Linux 6 and very old hardware.
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16 Apr 2026, Konstantin Olchanski, Suggestion, mhttpd user permissions
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We had our periodic discussion on MIDAS web page user permissions. (I cannot
find the link to the previous discussions, ouch!)
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24 Apr 2026, Konstantin Olchanski, Bug Report, increasing the max number of hot links in ODB
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> when I attempted to increase the max number of hotlinks in ODB , defined as
> #define MAX_OPEN_RECORDS 256 /**< number of open DB records */
> assert(sizeof(DATABASE_CLIENT) == 2112);
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27 Apr 2026, Konstantin Olchanski, Bug Report, increasing the max number of hot links in ODB
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> Indeed, updating MIDAS clients on each and every RPI etc in a running experiment may be a real challenge.
actually, only local clients must be rebuilt, remote clients connecting to the mserver do not care about ODB
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27 Apr 2026, Konstantin Olchanski, Bug Report, increasing the max number of hot links in ODB
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> I wonder why one needs more than 256 hotlinks at all.
I confirm that ALPHA is running with MAX_OPEN_RECORDS changed from 256 to 2048,
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21 May 2026, Konstantin Olchanski, Info, manalyzer --save-odb
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Due my oversight, the code for extracting ODB dumps from MIDAS data files from rootana/old_analyzer/event_dump.cxx was missing in
manalyzer.cxx.
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21 May 2026, Konstantin Olchanski, Bug Report, incompatible ODB XML dumps
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While testing manalyzer, I found that it dies from an exception on odbxx, error message is "/home/olchansk/packages/midas/include/odbxx.h:1231: No "handle"
attribute found in XML data".
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25 Jun 2026, Konstantin Olchanski, Forum, midas forum elog updated
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I updated the midas forum elog to the latest version from git: 083448f7
Also investigated elogd failure to start on reboot,
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25 Jun 2026, Konstantin Olchanski, Bug Report, incompatible ODB XML dumps
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> I fixed that by not requiring the handle explicitly ...
>
> [it was...] an uncaught exception. If you do not want the abort, catch the exception.
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25 Jun 2026, Konstantin Olchanski, Suggestion, Multithreaded deferred transitions
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> Multithreaded transitions were introduced by KO in 2019. Please ask him to make deferred transitions work
> again or simply use non-multithreaded transitions.
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08 Jul 2026, Konstantin Olchanski, Suggestion, mlogger MySQL improved connection
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you can also copy the reconnect code from history_schema.cxx.
if I remember right, the test case for correct reconnect is to start the mlogger,
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08 Jul 2026, Konstantin Olchanski, Suggestion, Multithreaded PySequencer
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> I was wondering if one can use multiple pysequencers at the same time and if not
> if this feature is planned in the future? Our experiment (mu3e) has one frontend
> per detector and each sequencer would only access a subset of ODB entries.
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