Experimental Physics and
Industrial Control System
| 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 <2004> 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 | Index | 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 <2004> 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 |
| <== Date ==> | <== Thread ==> |
|---|
| Subject: | Re: CA Gateway problem |
| From: | Dirk Zimoch <[email protected]> |
| To: | "Lahey, Terri E." <[email protected]> |
| Cc: | TECHTALK <[email protected]> |
| Date: | Fri, 06 Aug 2004 11:09:04 +0200 |
I'm running the gateway on Redhat Linux 9.0. Meanwhile, I can see the problem on 2 iocs, a 3.13.2 and a 3.13.9 system. The problem is independent of the client program and can be seen with 3.14.6 clients as well as with 3.13.2 clients.
In both cases the record is a bi, ZNAM="ERROR", ONAM="OK".
Reading the record of the 3.13.2 ioc always returns OK even when the record is in ERROR state. Trying to read the numerical value of the enum (with caget -n from R3.14.6 base) results in the following error message and returns 0:
CA.Client.Exception...............................................
Warning: "No reasonable data conversion between client and server types"
Context: "op=0, channel=X07MA-ID1-PLC:ERROR, type=DBR_TIME_SHORT, count=1, ctx="read failed""
Source File: ../getCopy.cpp line 81
Current Time: Fri Aug 06 2004 10:21:51.167738000
...................................................................
Read operation timed out: some PV data was not read.
In the gateway log is the following error message:
----------dump This=0x882a374---------
dimension=0 app-type=16 Scalar
prim-type=aitString(aitEnumString)
this=0x882a374 string=0x60497de8<OK>, length=2, buf length=3, type=Allocated
ref-count=1
total-bytes=47, data-size=11, element-count=1
LocalDataFormat
--------------------------------------
filename="../../../../src/cas/generic/casStrmClient.cc" line number=607
server tool changed bounds on request - get notify with PV=X07MA-ID1-PLC:ERROR type=15 count=1
Aug 06 10:53:24 !!! Errlog message received (message is above)
Other logged errormessages are like this: (related to reboot, I think) Jul 01 00:25:04 Warning: Virtual circuit unresponsive 172.19.150.24:5064 Jul 01 00:25:12 Warning: Virtual circuit disconnect 172.19.150.24:5064
and: (Can that confuse the gateway?)
Jul 05 12:39:37 gatePvData::monitor: ca_add_masked_array_event failed for X04SA-ES1-SMP:SCAN.D1DA:
The requested data transfer is greater than available memory or EPICS_CA_MAX_ARRAY_BYTES
The record on the 3.13.9 system is alway shown as ERROR. The numerical value appears to be 14, which is nonsense. For both records the correct value is 1. Reading this record does not procuce any error messages.
When I create a new virtual PV by requesting the VAL fiels explicitely, everything is correct.
The number of connected channels is not so high, 2600 at the moment.
What is special about the records? 1) The values are enums 2) The values had not changed for weeks 3) medm screens are connected for weeks
Dirk
Lahey, Terri E. wrote:
In the SLAC accelerator control system, we have seen a similar problem. We see that after awhile, a SEVERITY is not being updated (the value is constant, so we can't comment on that). The SEVERITY returned by the IOC changes, but the PV Gateway does not return the changed value. Restarting the CA Gateway fixes the problem, and then changes to SEVERITY are visible through the PV Gateway again.
We are running on Solaris using PV gateway 2.0.0.0Beta11 compiled with R3.14.6. We see the same problem when we compile the PV gateway with the gnu or solaris compiler. Our IOC is running R3.13.6, and the UNIX client is DM (R3.13.2) and caget (R3.13.2).
I think we see failures in SEVERITY returned by the PV gateway after the PV gateway connects to a very large number of PVs, eg. 17000 PVs. Is there some maximum number of PVs that we should support with the PV Gateway?
Is this possibly a problem with mismatch of EPICS versions running on the CA client, CA gateway, and IOC?
Dirk, Are you running on Solaris or Linux? What version of EPICS is on your IOCs? And what version of EPICS are the clients that are connecting to the PV gateway?
Terri Lahey
-----Original Message-----
From: Dirk Zimoch [mailto:[email protected]] Sent: Thursday, August 05, 2004 5:07 AM
To: TECHTALK
Subject: CA Gateway problem
Hi,
I'm using CA gateway 2.0.0.0Beta8 compiled with R3.14.6 to read records from another subnet. Now I found that one enum has the wrong value though the gateway. It is a bi with the two states "OK" and "ERROR". The record was on ERROR for weeks, but when it changed to OK, I could not see the change through the gateway! The severity however is correct, it went from MAJOR to NO_ALARM. All other records on the same IOC seem to be OK. I have checkes that there is no second record with the same name. What's wrong?
Dirk
-- Dr. Dirk Zimoch Swiss Light Source Paul Scherrer Institut Computing and Controls phone +41 56 310 5182 fax +41 56 310 4413
-- Dr. Dirk Zimoch Swiss Light Source Paul Scherrer Institut Computing and Controls phone +41 56 310 5182 fax +41 56 310 4413
- References:
- RE: CA Gateway problem Lahey, Terri E.
- Navigate by Date:
- Prev: Wanted: CONFIG.Vx for MVME2100 Eric Williams
- Next: Re: CA Gateway problem Kenneth Evans, Jr.
- Index: 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 <2004> 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024
- Navigate by Thread:
- Prev: RE: CA Gateway problem Lahey, Terri E.
- Next: Re: CA Gateway problem Kenneth Evans, Jr.
- Index: 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 <2004> 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024
·
Home
·
News
·
About
·
Base
·
Modules
·
Extensions
·
Distributions
·
Download
·
· Search · EPICS V4 · IRMIS · Talk · Bugs · Documents · Links · Licensing ·