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<== Date ==> | <== Thread ==> |
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Subject: | Re: Unpredictable behaviour with PyEpics |
From: | Matt Newville via Tech-talk <tech-talk at aps.anl.gov> |
To: | Simon Rose <Simon.Rose at ess.eu> |
Cc: | "tech-talk at aps.anl.gov" <tech-talk at aps.anl.gov> |
Date: | Tue, 26 May 2020 07:57:48 -0500 |
Hello all –
I am trying to set up something to do some automated testing of communication with a running IOC with PyEpics, but unfortunately I am running into some inconsistent behavior which makes it difficult to use as a reliable testing mechanism.
Specifically, if I have an IOC (EPICS base 7.0.3.1) up and running on the same machine, and run the following script:
from epics import PV
pv = PV(“test”)
assert pv.connect()
then most of the time, this works exactly as intended. However, somewhere around 1 in 5 times or so, it fails. I have tried to look at the network traffic (using Wireshark) between the IOC and the python client, but unfortunately I don’t see a difference between successful and unsuccessful connection attempts.
I am running both IOC and client inside a linux VM on my mac.