 20 Nov 2003, Konstantin Olchanski, , cannot shutdown defunct clients
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> While reviving midas on midtig01 after it was not used for a while ...
> [local:tigress:S]/>scl -w
> Name Host Timeout Last called
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20 Nov 2003, Stefan Ritt, , cannot shutdown defunct clients
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> 1) shutdown from mhttpd "programs" page -> "cannot shutdown client"
> 2) "sh mhttpd" from odbedit ->
> [midas.c:5298:cm_shutdown] cannot connect to client mhttpd on host
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20 Nov 2003, Konstantin Olchanski, , cannot shutdown defunct clients
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> > 1) shutdown from mhttpd "programs" page -> "cannot shutdown client"
> Have you tried a "cleanup" in ODBEdit?
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20 Nov 2003, Stefan Ritt, , cannot shutdown defunct clients
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> INT == "int", wraparound in 1 month
> DWORD == "unsigned int", wraparound in 2 months
>
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20 Nov 2003, Renee Poutissou, , cannot shutdown defunct clients
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Indeed the ODB command "cleanup" really works. I have used it several
times with the TWIST DAQ and regularly with the BNMR/MUSR setups where
we have these stubborn clients (ie feepics) that do not want to shutdown
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24 Nov 2003, Stefan Ritt, , cannot shutdown defunct clients
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> But there is one problem with "cleanup". It has a hardwired timeout of
> 2 seconds. This is a problem for tasks like lazylogger which set a timeout
> of 60 seconds when moving the tape. So BEWARE, if you issue the "cleanup"
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 09 Jul 2021, Konstantin Olchanski, Info, cannot push to bitbucket
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the day has arrived when I cannot git push to bitbucket. cloud computing rules!
I have never seen this error before and I do not think we have any hooks installed,
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08 Aug 2019, Konstantin Olchanski, Info, c++11 for RHEL/SL/CentOS-6
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The default el6 (RHEL/SL/CentOS-6) compiler is gcc-4.4.7, it does not support c++11, not even a little bit.
Do this to install newer c++ compilers and build MIDAS with c++11:
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06 Dec 2019, Konstantin Olchanski, Info, c++11 for RHEL/SL/CentOS-6
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> The default el6 (RHEL/SL/CentOS-6) compiler is gcc-4.4.7, it does not support c++11, not even a little bit.
The previously posted instructions are incomplete - one cannot cross-compile 32-bit executables (i.e. for running on 32-bit VME
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16 Jul 2026, Konstantin Olchanski, Info, c++ exceptions, follow up
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Bjarne Stroustrup gave a nice talk at CERN, good enough to bring Rene Brun out of retirement to ask a few
questions at the 1:16:50 mark.
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16 Jul 2026, Konstantin Olchanski, Info, c++ exceptions, follow up
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> If you did not want to use exceptions before watching this talk, you will after!
Not me. One issue, exceptions are unpredictable, for example, does this code always print "hello, world"?
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16 Jul 2026, Yiwen Yang, Info, c++ exceptions, follow up
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Thanks for sharing the videos, Konstantin.
> Unpredictable code can be dangerous:
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16 Jul 2026, Yiwen Yang, Info, c++ exceptions, follow up 
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| Looks like the code formatting got messed up by the elog... here it is in the attachment instead. |
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20 Jul 2026, Konstantin Olchanski, Info, c++ exceptions, follow up
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> Looks like the code formatting got messed up by the elog... here it is in the attachment instead.
unfortunately, your code does nothing because you do not call "i2c_set_bit(10, 1);".
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10 Nov 2017, Frederik Wauters, Bug Report, bug in init of hv class driver
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bug in init
-----------
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17 Nov 2017, Konstantin Olchanski, Bug Report, bug in init of hv class driver
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Hi, Frederick, this is my personal opinion on the slow controls hv classes, I have
used them a couple of times and I found them full of little buglets like this,
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21 Nov 2017, Stefan Ritt, Bug Report, bug in init of hv class driver
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> bug in init
> -----------
>
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21 Nov 2017, Konstantin Olchanski, Bug Report, bug in init of hv class driver
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>
> The original idea behind the hv driver is that all voltages in the ODB and the class driver are
> positive. If you have a negative power supply, then the voltage is inverted at the device
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21 Jan 2007, Denis Bilenko, Bug Report, buffer bugs
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Hello,
We've been using midas and have stumbled upon some inconsistent behaviour:
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23 Jan 2007, Stefan Ritt, Bug Report, buffer bugs
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[quote="Denis Bilenko"]1. Blocking calls to midas api aren't usable when client is connected through mserver. This is true at least for bm_receive_event,
but seems to be a more general problem - midas application has call cm_yield within 10 seconds (or whatever timeout is set) to remain alive.
That not the case when RPC is not used.[/quote]
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