Experimental Physics and
Industrial Control System

The problem I was having, and its resolution, is discussed in this tech-talk thread:

http://www.aps.anl.gov/epics/tech-talk/2013/msg00836.php

Mark


________________________________________
From: [email protected] [[email protected]] on behalf of Mark Rivers [[email protected]]
Sent: Thursday, June 27, 2013 6:21 PM
To: D Peter Siddons; [email protected]
Subject: RE: caget apparent timeout

That sounds like a problem I had recently.  I tracked it down to a misconfigured DNS server that was not resolving the reverse DNS lookup, i.e. IP number to IP name.

Mark


________________________________________
From: [email protected] [[email protected]] on behalf of D Peter Siddons [[email protected]]
Sent: Thursday, June 27, 2013 4:14 PM
To: [email protected]
Subject: Re: caget apparent timeout

Hi Andrew,

EPICS 3.14.12.2
Ubuntu 12.04.2

Pete.

On 06/27/2013 01:13 PM, Andrew Johnson wrote:
> Hi Peter,
>
> On 2013-06-27 D Peter Siddons wrote:
>> Occasionally, I need to check or change a PV, for which I use the
>> caget and caput command-line utilities. The operation (put or get) is
>> executed immediately, but then the PC waits for several seconds before
>> the cursor is returned. Does anyone know what is causing this? It feels
>> like a network timeout, but all I have is a PC and an IOC with a
>> crossover cable between. Anyone know the fix?
> What version of EPICS were your caget/caput programs built against, and what
> is the Linux version they're running on?  We used to see delays like this at
> process shutdown while the atexit() routines were being run, but they were
> cleaned up quite a few releases ago.
>
> - Andrew

--
D. Peter Siddons
Detector Development Group Leader
Bldg. 535B
Photon Sciences Directorate,
Brookhaven National Laboratory
Upton, NY 11973

email: [email protected]
Phone: (631) 344-2738

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