On Wed, 26 Aug 2026 at 14:53, Torsten Bögershausen <tboegi at edom.se
<mailto:tboegi at edom.se>> wrote:
Thanks for the fast answers.
After updating EPICS base I can reproduce the problem here.
It seems to be a caput to a stringout record, which kills the
business.
/Torsten
On 2026-08-26 14:21, Ralph Lange wrote:
> Might be https://urldefense.us/v3/__https://github.com/epics-base/epics-base/issues/943__;!!G_uCfscf7eWS!b5oKVovd-iHrY9cTdRAXtmD3ZbE2wyIWkTfndb46IPDaXMT08BA6DEZQhSGDdmW1TJZtz5JAB2Sp4YoALk0$
<https://urldefense.us/v3/__https://github.com/epics-base/
epics-base/issues/943__;!!G_uCfscf7eWS!
fbhB__iF6SebWNlgDxtBowHn7kpX5PFaCpaadsefQivb6hP-
HkBViEkqdoI6CbPxfEpcCa6FoUBTSougP4T21J-nPQ$> <https://
> github.com/epics-base/epics-base/issues/943 <https://
urldefense.us/v3/__https://urldefense.us/v3/__http://github.com/epics-base/epics-base/__;!!G_uCfscf7eWS!b5oKVovd-iHrY9cTdRAXtmD3ZbE2wyIWkTfndb46IPDaXMT08BA6DEZQhSGDdmW1TJZtz5JAB2SpdlvHRJw$
issues/943__;!!G_uCfscf7eWS!
fbhB__iF6SebWNlgDxtBowHn7kpX5PFaCpaadsefQivb6hP-
HkBViEkqdoI6CbPxfEpcCa6FoUBTSougP4TicZuakw$>>
>
> On Wed, 26 Aug 2026 at 14:17, Simon Rose via Core-talk <core-
> talk at aps.anl.gov <mailto:talk at aps.anl.gov> <mailto:core-
talk at aps.anl.gov <mailto:core-talk at aps.anl.gov>>> wrote:
>
> Hi Torsten -
>
> Yes, I think I see the same thing. We actually saw it
last week
> during the training at ESS but blamed it on network issues.
>
> This can be replicated on the 7.0 branch of epics-base
quite
> easily: start an IOC and try (for example) to use caput
to write to
> any record. In the IOC shell I see
>
> CAS: forcing disconnect from 172.18.22.141:59117
<https://urldefense.us/v3/__http://172.18.22.141:59117__;!!
G_uCfscf7eWS!fbhB__iF6SebWNlgDxtBowHn7kpX5PFaCpaadsefQivb6hP-
HkBViEkqdoI6CbPxfEpcCa6FoUBTSougP4Teady_qQ$>
> <https://urldefense.us/v3/__http://172.18.22.141:59117__;!!G_uCfscf7eWS!b5oKVovd-iHrY9cTdRAXtmD3ZbE2wyIWkTfndb46IPDaXMT08BA6DEZQhSGDdmW1TJZtz5JAB2SpFWgASPA$ <https://urldefense.us/v3/
__https://urldefense.us/v3/__http://172.18.22.141:59117__;!!G_uCfscf7eWS!__;!!G_uCfscf7eWS!b5oKVovd-iHrY9cTdRAXtmD3ZbE2wyIWkTfndb46IPDaXMT08BA6DEZQhSGDdmW1TJZtz5JAB2SpL5RC1ps$
fbhB__iF6SebWNlgDxtBowHn7kpX5PFaCpaadsefQivb6hP-
HkBViEkqdoI6CbPxfEpcCa6FoUBTSougP4Teady_qQ$>>
>
> And from the terminal trying to write to the IOC with
caput I see
>
> $ ./caput record_name 1
> Old : record_name 0
>
CA.Client.Exception...............................................
> Warning: "Virtual circuit disconnect"
> Context: "172.18.22.141:5064 <https://
urldefense.us/v3/__https://urldefense.us/v3/__http://172.18.22.141:5064__;!!G_uCfscf7eWS!__;!!G_uCfscf7eWS!b5oKVovd-iHrY9cTdRAXtmD3ZbE2wyIWkTfndb46IPDaXMT08BA6DEZQhSGDdmW1TJZtz5JAB2SpItKNng4$
fbhB__iF6SebWNlgDxtBowHn7kpX5PFaCpaadsefQivb6hP-
HkBViEkqdoI6CbPxfEpcCa6FoUBTSougP4RFXw6x9w$>
<https://urldefense.us/v3/__http://172.18.22.141:5064__;!!G_uCfscf7eWS!b5oKVovd-iHrY9cTdRAXtmD3ZbE2wyIWkTfndb46IPDaXMT08BA6DEZQhSGDdmW1TJZtz5JAB2Spx1dFUUE$ <https://urldefense.us/v3/
__https://urldefense.us/v3/__http://172.18.22.141:5064__;!!G_uCfscf7eWS!__;!!G_uCfscf7eWS!b5oKVovd-iHrY9cTdRAXtmD3ZbE2wyIWkTfndb46IPDaXMT08BA6DEZQhSGDdmW1TJZtz5JAB2SpItKNng4$
fbhB__iF6SebWNlgDxtBowHn7kpX5PFaCpaadsefQivb6hP-
HkBViEkqdoI6CbPxfEpcCa6FoUBTSougP4RFXw6x9w$>>"
> Source File: ../cac.cpp line 1241
> Current Time: Wed Aug 26 2026 14:15:06.470965000
>
..................................................................
>
CA.Client.Exception...............................................
> Warning: "Virtual circuit disconnect"
> Context: "op=0, channel=record_name,
type=DBR_TIME_DOUBLE,
> count=1, ctx="172.18.22.141:5064 <https://urldefense.us/
v3/__https://urldefense.us/v3/__http://172.18.22.141:5064__;!!G_uCfscf7eWS!__;!!G_uCfscf7eWS!b5oKVovd-iHrY9cTdRAXtmD3ZbE2wyIWkTfndb46IPDaXMT08BA6DEZQhSGDdmW1TJZtz5JAB2SpItKNng4$
fbhB__iF6SebWNlgDxtBowHn7kpX5PFaCpaadsefQivb6hP-
HkBViEkqdoI6CbPxfEpcCa6FoUBTSougP4RFXw6x9w$>
<https://urldefense.us/v3/__http://172.18.22.141:5064__;!!G_uCfscf7eWS!b5oKVovd-iHrY9cTdRAXtmD3ZbE2wyIWkTfndb46IPDaXMT08BA6DEZQhSGDdmW1TJZtz5JAB2Spx1dFUUE$ <https://urldefense.us/v3/
__https://urldefense.us/v3/__http://172.18.22.141:5064__;!!G_uCfscf7eWS!__;!!G_uCfscf7eWS!b5oKVovd-iHrY9cTdRAXtmD3ZbE2wyIWkTfndb46IPDaXMT08BA6DEZQhSGDdmW1TJZtz5JAB2SpItKNng4$
fbhB__iF6SebWNlgDxtBowHn7kpX5PFaCpaadsefQivb6hP-
HkBViEkqdoI6CbPxfEpcCa6FoUBTSougP4RFXw6x9w$>>""
> Source File: ../getCopy.cpp line 91
> Current Time: Wed Aug 26 2026 14:15:06.471381000
>
..................................................................
>
CA.Client.Exception...............................................
> Warning: "Identical process variable names on
multiple servers"
> Context: "Channel: "record_name", Connecting to:
> 172.18.22.141:5064 <https://urldefense.us/v3/
__https://urldefense.us/v3/__http://172.18.22.141:5064__;!!G_uCfscf7eWS!__;!!G_uCfscf7eWS!b5oKVovd-iHrY9cTdRAXtmD3ZbE2wyIWkTfndb46IPDaXMT08BA6DEZQhSGDdmW1TJZtz5JAB2SpItKNng4$
fbhB__iF6SebWNlgDxtBowHn7kpX5PFaCpaadsefQivb6hP-
HkBViEkqdoI6CbPxfEpcCa6FoUBTSougP4RFXw6x9w$>
<https://urldefense.us/v3/__http://172.18.22.141:5064__;!!G_uCfscf7eWS!b5oKVovd-iHrY9cTdRAXtmD3ZbE2wyIWkTfndb46IPDaXMT08BA6DEZQhSGDdmW1TJZtz5JAB2Spx1dFUUE$ <https://urldefense.us/v3/
__https://urldefense.us/v3/__http://172.18.22.141:5064__;!!G_uCfscf7eWS!__;!!G_uCfscf7eWS!b5oKVovd-iHrY9cTdRAXtmD3ZbE2wyIWkTfndb46IPDaXMT08BA6DEZQhSGDdmW1TJZtz5JAB2SpItKNng4$
fbhB__iF6SebWNlgDxtBowHn7kpX5PFaCpaadsefQivb6hP-
HkBViEkqdoI6CbPxfEpcCa6FoUBTSougP4RFXw6x9w$>>, Ignored:
> 192.168.205.1:5064 <https://urldefense.us/v3/
__https://urldefense.us/v3/__http://192.168.205.1:5064__;!!G_uCfscf7eWS!__;!!G_uCfscf7eWS!b5oKVovd-iHrY9cTdRAXtmD3ZbE2wyIWkTfndb46IPDaXMT08BA6DEZQhSGDdmW1TJZtz5JAB2SpVXTEPIo$
fbhB__iF6SebWNlgDxtBowHn7kpX5PFaCpaadsefQivb6hP-
HkBViEkqdoI6CbPxfEpcCa6FoUBTSougP4R8uNNpZQ$>
<https://urldefense.us/v3/__http://192.168.205.1:5064__;!!G_uCfscf7eWS!b5oKVovd-iHrY9cTdRAXtmD3ZbE2wyIWkTfndb46IPDaXMT08BA6DEZQhSGDdmW1TJZtz5JAB2Splp3y9Y4$ <https://urldefense.us/v3/
__https://urldefense.us/v3/__http://192.168.205.1:5064__;!!G_uCfscf7eWS!__;!!G_uCfscf7eWS!b5oKVovd-iHrY9cTdRAXtmD3ZbE2wyIWkTfndb46IPDaXMT08BA6DEZQhSGDdmW1TJZtz5JAB2SpVXTEPIo$
fbhB__iF6SebWNlgDxtBowHn7kpX5PFaCpaadsefQivb6hP-
HkBViEkqdoI6CbPxfEpcCa6FoUBTSougP4R8uNNpZQ$>>"
> Source File: ../cac.cpp line 1324
> Current Time: Wed Aug 26 2026 14:15:06.475347000
>
..................................................................
> Read operation timed out: PV data was not read.
> New : record_name
>
> Something is wrong here...
>
> Cheers,
> Simon
>
> *From: *Core-talk <core-talk-bounces at aps.anl.gov
<mailto:core-talk-bounces at aps.anl.gov> <mailto:core-talk-
<mailto:core-talk->
> bounces at aps.anl.gov <mailto:bounces at aps.anl.gov>>> on behalf
of Torsten Bögershausen via Core-
> talk <core-talk at aps.anl.gov <mailto:core-
talk at aps.anl.gov> <mailto:core-talk at aps.anl.gov <mailto:core-
talk at aps.anl.gov>>>
> *Date: *Wednesday, 26 August 2026 at 13:59
> *To: *core-talk at aps.anl.gov <mailto:core-
talk at aps.anl.gov> <mailto:core-talk at aps.anl.gov <mailto:core-
talk at aps.anl.gov>> <core-
> talk at aps.anl.gov <mailto:talk at aps.anl.gov> <mailto:core-
talk at aps.anl.gov <mailto:core-talk at aps.anl.gov>>>
> *Subject: *github ci problem: CAS: forcing disconnect from
> 127.0.0.1:57020 <https://urldefense.us/v3/
__https://urldefense.us/v3/__http://127.0.0.1:57020__;!!G_uCfscf7eWS!__;!!G_uCfscf7eWS!b5oKVovd-iHrY9cTdRAXtmD3ZbE2wyIWkTfndb46IPDaXMT08BA6DEZQhSGDdmW1TJZtz5JAB2SpdLVhSp4$
fbhB__iF6SebWNlgDxtBowHn7kpX5PFaCpaadsefQivb6hP-
HkBViEkqdoI6CbPxfEpcCa6FoUBTSougP4SdmPgehw$>
<https://urldefense.us/v3/__http://127.0.0.1:57020__;!!G_uCfscf7eWS!b5oKVovd-iHrY9cTdRAXtmD3ZbE2wyIWkTfndb46IPDaXMT08BA6DEZQhSGDdmW1TJZtz5JAB2SpR_jypLw$ <https://urldefense.us/v3/
__https://urldefense.us/v3/__http://127.0.0.1:57020__;!!G_uCfscf7eWS!__;!!G_uCfscf7eWS!b5oKVovd-iHrY9cTdRAXtmD3ZbE2wyIWkTfndb46IPDaXMT08BA6DEZQhSGDdmW1TJZtz5JAB2SpdLVhSp4$
fbhB__iF6SebWNlgDxtBowHn7kpX5PFaCpaadsefQivb6hP-
HkBViEkqdoI6CbPxfEpcCa6FoUBTSougP4SdmPgehw$>>
>
>
> Hej EPICS-experts,
>
> since some time (July 10 2026 or 2026-07-10) we have a
failure
> on one of our github runners.
>
> If someone wants to look, here is a good run:
> <https://urldefense.us/v3/__https://github.com/
<https://urldefense.us/v3/__https://github.com/>
> EuropeanSpallationSource/m-epics-ethercatmc/actions/
> runs/29092838578__;!!G_uCfscf7eWS!
>
Zp_A98G8tvAmH3xmEtRxKFl_0Ydm7Wz0MSRmQ1ZrULhuV4JUEssosb0rF6Cv3MthfRkOlH0LmK79aHPdMb8$ <https://urldefense.us/v3/__https://github.com/EuropeanSpallationSource/m-epics-ethercatmc/actions/runs/29092838578__;!!G_uCfscf7eWS!Zp_A98G8tvAmH3xmEtRxKFl_0Ydm7Wz0MSRmQ1ZrULhuV4JUEssosb0rF6Cv3MthfRkOlH0LmK79aHPdMb8$ <https://urldefense.us/v3/__https://github.com/EuropeanSpallationSource/m-epics-ethercatmc/actions/runs/29092838578__;!!G_uCfscf7eWS!Zp_A98G8tvAmH3xmEtRxKFl_0Ydm7Wz0MSRmQ1ZrULhuV4JUEssosb0rF6Cv3MthfRkOlH0LmK79aHPdMb8$>> >
>
> One of the failing runs is here:
> <https://urldefense.us/v3/__https://github.com/
<https://urldefense.us/v3/__https://github.com/>
> EuropeanSpallationSource/m-epics-ethercatmc/actions/
> runs/32959143825/job/98147389788__;!!G_uCfscf7eWS!
>
Zp_A98G8tvAmH3xmEtRxKFl_0Ydm7Wz0MSRmQ1ZrULhuV4JUEssosb0rF6Cv3MthfRkOlH0LmK79fn7GMoM$ <https://urldefense.us/v3/__https://github.com/EuropeanSpallationSource/m-epics-ethercatmc/actions/runs/32959143825/job/98147389788__;!!G_uCfscf7eWS!Zp_A98G8tvAmH3xmEtRxKFl_0Ydm7Wz0MSRmQ1ZrULhuV4JUEssosb0rF6Cv3MthfRkOlH0LmK79fn7GMoM$ <https://urldefense.us/v3/__https://github.com/EuropeanSpallationSource/m-epics-ethercatmc/actions/runs/32959143825/job/98147389788__;!!G_uCfscf7eWS!Zp_A98G8tvAmH3xmEtRxKFl_0Ydm7Wz0MSRmQ1ZrULhuV4JUEssosb0rF6Cv3MthfRkOlH0LmK79fn7GMoM$>> >
>
>
> Of course the tests run fine here on a local machine
> (with probably sighly different versions)
>
> So digging into the log file shows one problem:
>
> Wed Aug 26 11:21:03 UTC 2026
> + ./runTests.sh ca://IOC:m1 100_Record-HOMF.py
> CAS: forcing disconnect from 127.0.0.1:48202 <https://
urldefense.us/v3/__https://urldefense.us/v3/__http://127.0.0.1:48202__;!!G_uCfscf7eWS!__;!!G_uCfscf7eWS!b5oKVovd-iHrY9cTdRAXtmD3ZbE2wyIWkTfndb46IPDaXMT08BA6DEZQhSGDdmW1TJZtz5JAB2Sp5jQPCeo$
fbhB__iF6SebWNlgDxtBowHn7kpX5PFaCpaadsefQivb6hP-
HkBViEkqdoI6CbPxfEpcCa6FoUBTSougP4SHrkr2ag$>
<https://urldefense.us/v3/__http://127.0.0.1:48202__;!!G_uCfscf7eWS!b5oKVovd-iHrY9cTdRAXtmD3ZbE2wyIWkTfndb46IPDaXMT08BA6DEZQhSGDdmW1TJZtz5JAB2Sp3GGF5NI$ <https://urldefense.us/v3/
__https://urldefense.us/v3/__http://127.0.0.1:48202__;!!G_uCfscf7eWS!__;!!G_uCfscf7eWS!b5oKVovd-iHrY9cTdRAXtmD3ZbE2wyIWkTfndb46IPDaXMT08BA6DEZQhSGDdmW1TJZtz5JAB2Sp5jQPCeo$
fbhB__iF6SebWNlgDxtBowHn7kpX5PFaCpaadsefQivb6hP-
HkBViEkqdoI6CbPxfEpcCa6FoUBTSougP4SHrkr2ag$>>
> #... and later, PYT stands for the output of pytest:
> PYT:2026-08-26 11:21:04 AxisCom get ca://IOC:m1.VAL
ret=100.11
> PYT:2026-08-26 11:21:04 AxisCom get ca://IOC:m1.DMOV
> PYT:cannot connect to IOC:m1.DMOV
> PYT:2026-08-26 11:21:09 AxisCom get ca://IOC:m1.DMOV
ret=None
>
> Before I try to set up a system with the hopefully exact
versions as
> on github:
> Does a bell ring for anybody here ?
> The commits in EPICS base show that some additional
checks had been
> introduced when processing channel access messages in rsrv
> However, we are using pyepics inside the test cases,
which uses
> the libca from base, so things should work.
> (And yes, Timo, we are using mostly pvacess for 99% of
the tests)
>
> Any ideas are welcome
> Best Regards
> /Torsten
>
>
>
