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<div><span style="-webkit-tap-highlight-color: transparent; -webkit-text-size-adjust: 100%;">Hi Brad,</span><br>
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<div><span style="-webkit-tap-highlight-color: transparent; -webkit-text-size-adjust: 100%;"><br>
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<div><span style="-webkit-tap-highlight-color: transparent; -webkit-text-size-adjust: 100%;">A week or so, I had them moved from the hall A eel s/n (192) to the hall A s/n (188) where the BB Rpi has been. </span></div>
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<div><span style="-webkit-tap-highlight-color: transparent; -webkit-text-size-adjust: 100%;">I’ll get with Brian to make sure the shell environment settings are correct. </span><br>
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<div><span style="-webkit-tap-highlight-color: transparent; -webkit-text-size-adjust: 100%;">Tomorrow, I’ll disable the wifi on that Rpi and see if that will fix the issue. </span></div>
<div><span style="-webkit-tap-highlight-color: transparent; -webkit-text-size-adjust: 100%;"><br>
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<div><span style="-webkit-text-size-adjust: 100%;">Regards,</span></div>
<div><span style="-webkit-text-size-adjust: 100%;">Marc</span></div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Brad Sawatzky <brads@jlab.org><br>
<b>Sent:</b> Monday, June 27, 2022 9:03 PM<br>
<b>To:</b> Marc Mcmullen <mcmullen@jlab.org><br>
<b>Cc:</b> dsg-halla_gem@jlab.org <dsg-halla_gem@jlab.org><br>
<b>Subject:</b> [EXTERNAL] Re: SBS GEM process variables</font>
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<div class="PlainText">Hi Marc,<br>
<br>
That warning is due to the PV been mirrored on the channel access<br>
gateway. It is usually something of an inefficiency, but not fatal.<br>
However, failure to pay attention to this kind of thing can cause PV<br>
mirroring loops as a corner case.<br>
<br>
In general you want something like the following in your shell environ:<br>
export EPICS_CA_ADDR_LIST="129.57.191.255 129.57.164.255 129.57.192.255 129.57.255.11"<br>
The first three are gateway/broadcast addresses for Hall A networks.<br>
The last is the "Hall A" channel access gateway that provides a bridge<br>
to PVs outside the Hall A networks.<br>
I believe it is considered best practice to also set:<br>
export EPICS_CA_AUTO_ADDR_LIST=NO<br>
<br>
<br>
I did a 'caget' myself from within the Hall A network and got a bit of<br>
an odd response:<br>
adaq@adaq2 2038% caget HAGEM:SBS:gas:ch41<br>
CA.Client.Diagnostic..............................................<br>
Message: "Ambiguous channel host (multiple IOC's have a channel by that name)"<br>
Severity: "Warning" Context: "Channel: HAGEM:SBS:gas:ch41 Accepted: adaqsc-xb.cha.jlab.org:5064 Rejected: adaqsc.jlab.org:5064 "<br>
Source File: ../service.c Line Number: 910<br>
..................................................................<br>
HAGEM:SBS:gas:ch41 0.793<br>
<br>
The response is from adaqsc-xb.cha.jlab.org. That hostname resolves to<br>
10.58.164.210, which is some internal subnet. That seems a little odd<br>
to me. I'm not sure what is going on there, but Ole Hansen would be<br>
able to tell you. (I would have expected an RPi address on the 192 or<br>
164.)<br>
<br>
Have you updated the IP address for anything moved into the Hall (RPis,<br>
etc) to get them off the 'dev' subnet and on to an appropriate Hall<br>
network?<br>
<br>
Note that you may also see weird results if you have both the wired and<br>
wifi interfaces active. The wifi interface on the RPi should be<br>
permanently disabled.<br>
<br>
-- Brad<br>
<br>
<br>
On Mon, 27 Jun 2022, Marc Mcmullen wrote:<br>
<br>
> Hi Brad,<br>
> <br>
> Since the SBS Rpi was moved to the hall I have noticed a warning about the<br>
> pressure PVs during testing. Are there multiple servers running the HAGEM<br>
> PVs?<br>
> <br>
> CA.Client.Exception...............................................<br>
> <br>
> Warning: "Identical process variable names on multiple servers"<br>
> <br>
> Context: "Channel: "HAGEM:SBS:gas:ch41", Connecting to:<br>
> adaqsc.jlab.org:5064, Ignored: cagwops.acc.jlab.org:5064"<br>
> <br>
> Source File: ../cac.cpp line 1320<br>
> <br>
> Current Time: Mon Jun 27 2022 10:17:39.155967571<br>
> <br>
> <br>
> <br>
> Regards,<br>
> <br>
> Marc McMullen<br>
> <br>
> Sr. Instrumentation Designer<br>
> <br>
> Detector Support Group<br>
> <br>
> <a href="tel:(757) 269-7738">(757) 269-7738</a><br>
<br>
-- <br>
Brad Sawatzky (he/him), PhD <brads@jlab.org> -<>- Jefferson Lab/SciComp/C111<br>
Ph: <a href="tel:757-269-5947">757-269-5947</a> -<>- Fax: <a href="tel:757-269-5235">
757-269-5235</a> -<>- Pager: brads-page@jlab.org<br>
The most exciting phrase to hear in science, the one that heralds new<br>
discoveries, is not "Eureka!" but "That's funny..." -- Isaac Asimov<br>
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