 28 Apr 2023, Martin Mueller, Forum, Problem with running midas odbxx frontends on a remote machine using the -h option
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> > As i said we can easily reproduce this with midas/examples/odbxx/odbxx_test.cpp (with cm_connect_experiment changed to "localhost")
> > [test,ERROR] [system.cxx:5104:recv_tcp2,ERROR] unexpected connection closure
> > [test,ERROR] [system.cxx:5158:ss_recv_net_command,ERROR] error receiving network command header, see messages
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16 Sep 2024, Mark Grimes, Bug Report, Crash using ODB watch
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Hi,
Maybe I've misunderstood the code, but odb::watch() creates a deep copy of itself to set the watch to. The comment where this happens specifies that this
is in case the current one goes out of scope. See https://bitbucket.org/tmidas/midas/src/2878647fb73648474b35223ce53a125180f751b3/src/odbxx.cxx#lines-1393:1395
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08 Oct 2024, Mark Grimes, Bug Report, Difficulty running MIDAS on Rocky 9.4
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We run Midas with no problems on Rocky 9.4, although not in a virtual machine. We're very close to the head of `develop`.
I'm fairly sure I've seen an error like this before. I didn't pay it much attention because it was transitory and I was doing something weird at the time |
 12 Feb 2025, Mark Grimes, Forum, TMFeRpcHandlerInterface::HandleEndRun when running offline on a Midas file
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Hi,
I have a manalyzer that uses a derived class of TMFeRpcHandlerInterface to communicate information to
Midas during online running. At the end of each run it saves out custom data in the
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25 Mar 2025, Mark Grimes, Forum, TMFeRpcHandlerInterface::HandleEndRun when running offline on a Midas file
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Hi,
The question was about the TMFeRpcHandlerInterface, not the TARunObject interface. Derived classes of TARunObject do indeed work as expected in our
environment. We have worked around the issue by using an implementation of TARunObject as well as the (separate) implementation of
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26 Mar 2025, Mark Grimes, Forum, TMFeRpcHandlerInterface::HandleEndRun when running offline on a Midas file
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This was exactly the question, should I expect it to run? There's no point in the HandleBinaryRpc method offline, but there's an argument that the HandleBeginRun/HandleEndRun
methods have a use.
I have the answer and we have a workaround, thanks.
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04 Jun 2025, Mark Grimes, Bug Report, Memory leak in mhttpd binary RPC code
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Hi,
During an evening of running we noticed that memory usage of mhttpd grew to close to 100Gb. We think we've traced this to the following issue when making
RPC calls.
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07 Jun 2025, Mark Grimes, Bug Report, Memory leak in mhttpd binary RPC code 
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Hi,
We applied an intermediate fix for this locally and it seems to have fixed our issue. The attached plot shows the percentage memory use
on our machine with 128 Gb memory, as a rough proxy for mhttpd memory use. After applying our fix mhttpd seems to be happy using ~7% of the memory |
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15 Jun 2025, Mark Grimes, Bug Report, Memory leak in mhttpd binary RPC code
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Many thanks for the fix. We've applied and see better memory performance. We still have to kill and restart
mhttpd after a few days however. I think the official fix is missing this part:
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04 Jul 2025, Mark Grimes, Bug Report, Memory leaks in mhttpd
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Something changed in our system and we started seeing memory leaks in mhttpd again. I guess someone
updated some front end or custom page code that interacted with mhttpd differently.
I found a few memory leaks in some (presumably) rarely seen corner cases and we now see steady
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17 Sep 2025, Mark Grimes, Bug Report, Midas no longer compiles on macOS
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Hi,
The current develop branch no longer compiles on macOS. I get lots of errors of the form
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17 Sep 2025, Mark Grimes, Suggestion, Get manalyzer to configure midas::odb when running offline
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Hi,
Lots of users like the midas::odb interface for reading from the ODB in manalyzers. It currently doesn't
work offline however without a few manual lines to tell midas::odb to read from the ODB copy in the run
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18 Sep 2025, Mark Grimes, Suggestion, Get manalyzer to configure midas::odb when running offline
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> ....Before commit of this patch, can you confirm the RunInfo destructor
> deletes this ODB stuff from odbxx? manalyzer takes object life times very seriously.
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26 Sep 2025, Mark Grimes, Suggestion, Get manalyzer to configure midas::odb when running offline
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> ...I talked to KO so he agreed that yo then commit your proposed change of manalyzer
Merged and pushed.
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16 Sep 2024, Marius Köppel, Bug Report, Crash using ODB watch
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Hi all,
last week I was running MIDAS with the commit 3ad98c5. Today I updated MIDAS and now all my watch functions are crashing. Attached I have a minimal example |
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12 Jun 2019, Marius Koeppel, Forum, Strange JS array creation
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Hello everybody,
I have a strange JS behavior. In one of my frontends I create a key in the ODB with:
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24 Jun 2019, Marius Koeppel, Forum, Strange JS array creation
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> > for (i = 0; i < lines.length; i++) {
> > modbset("/Equipment/Switching/Variables/DATA_WRITE[" + String(i) + "]", parseInt(lines[i]));
> > }
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12 Feb 2020, Marius Koeppel, Forum, Difference between "Event Data Size" and "All Bank Size"
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Dear all,
we are trying to build Midas events on FPGAs and send them directly to the midas
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13 Feb 2020, Marius Koeppel, Forum, Writting Midas Events via FPGAs
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Dear all,
we creating Midas events directly inside a FPGA and send them off via DMA into the PC RAM. For reading out this RAM via Midas the FPGA sends as a pointer |
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20 Feb 2020, Marius Koeppel, ,
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We also agree and found the problem now. Since we build everything (MIDAS Event Header, Bank Header, Banks etc.) in the FPGA we had some struggle with
the MIDAS data format (http://lmu.web.psi.ch/docu/manuals/bulk_manuals/software/midas195/html/AppendixA.html). We thought that only the MIDAS Event needs |