Experimental Physics and
Industrial Control System

On Thu, Apr 4, 2024 at 1:28 PM Érico Nogueira Rolim via Tech-talk <tech-talk at aps.anl.gov> wrote:

...It also seems relevant that puts
to these waveforms don't show up in the resulting log.
...
I saw a similar-ish issue in the caPutLog bugtracker [1], but it was
specifically about QSRV1.

I don't think #22 issue is limited to QSRV1. Rather there is a race condition involving caPutLog and monitoring VAL of waveformRecord and similar.

I see, that makes sense. It would be good to update the commit message in that PR, then. Our affected IOCs don't even link any PVAccess libraries, so I assumed it wouldn't apply to us.

Could you try Simon's proposed fix?

https://github.com/epics-modules/caPutLog/pull/23

It seems to have worked. I will leave a comment in the PR as well.

Thank you for the pointer!

 

Our versions of things:

In the IOCs and sequencer client:

- epics-base: 7.0.7

- caPutLog: R4.0

- Sequencer: R2-2-9


One of the PyDM interfaces (via conda):

- PyDM: 1.10.3

- pyEPICS: 3.5.0


Other PyDM interface report (via conda):

- PyDM: 1.22.0 or 1.19.1

- pyEPICS: 3.5.1 (from pip)


Cheers,

Érico


[1] https://urldefense.us/v3/__https://github.com/epics-modules/caPutLog/issues/22__;!!G_uCfscf7eWS!ejmmpa48B5Lg-cSSwalI96o2gTPgfS-fdi3OeNW5T6si95vrsnEEIouNzK6cet7e6zcOuYs5JytQ8Xs9sGnrzYO4c64$

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References:

caPutLog breaks monitoring of PV when the same channel is used for putting Érico Nogueira Rolim via Tech-talk

Re: caPutLog breaks monitoring of PV when the same channel is used for putting Michael Davidsaver via Tech-talk

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