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<== Date ==> <== Thread ==>

Subject: Weird behaviour of R3.14.12.2 soft IOC
From: Eric Norum <wenorum@lbl.gov>
To: "tech-talk@aps.anl.gov tech-talk" <tech-talk@aps.anl.gov>
Date: Wed, 18 Jul 2012 16:33:08 -0700
Something strange has just occurred on one of our new linux soft IOC platforms.

The IOC application is running (on machine "b04lxioc02") and has a PV:
epics> dbpr CAENA36XX:1:BulkVoltage
ASG:                DESC: Bulk supply voltage               DISA: 0             
DISP: 0             DISV: 1             NAME: CAENA36XX:1:BulkVoltage           
RVAL: 0             SEVR: NO_ALARM      STAT: NO_ALARM      SVAL: 0             
TPRO: 0             VAL: 27.5     
      
But a client on the same machine (or on another machine on then net for that matter) fails to see this:
enorum@b04lxioc02> caget CAENA36XX:1:BulkVoltage
Read operation timed out: some PV data was not read.
CAENA36XX:1:BulkVoltage        0
CA.Client.Exception...............................................
    Warning: "Virtual circuit disconnect"
    Context: "op=0, channel=CAENA36XX:1:BulkVoltage, type=DBR_TIME_DOUBLE, count=1, ctx="b04lxioc02.als.lbl.gov:42204""
    Source File: ../getCopy.cpp line 92
    Current Time: Wed Jul 18 2012 16:24:10.044127476
..................................................................

And forcing a direct connection attempt doesn't help:
enorum@b04lxioc02> EPICS_CA_ADDR_LIST=localhost EPICS_CA_AUTO_ADDR_LIST=NO  caget CAENA36XX:1:BulkVoltage
Read operation timed out: some PV data was not read.
CAENA36XX:1:BulkVoltage        0
CA.Client.Exception...............................................
    Warning: "Virtual circuit disconnect"
    Context: "op=0, channel=CAENA36XX:1:BulkVoltage, type=DBR_TIME_DOUBLE, count=1, ctx="localhost:42204""
    Source File: ../getCopy.cpp line 92
    Current Time: Wed Jul 18 2012 16:25:09.027521134
..................................................................

Host info:
enorum@b04lxioc02 > uname -a
Linux b04lxioc02.als 2.6.32-220.17.1.el6.x86_64 #1 SMP Tue May 15 17:16:46 CDT 2012 x86_64 x86_64 x86_64 GNU/Linux

EPICS info -- IOC startup: 
iocInit
Starting iocInit
############################################################################
## EPICS R3.14.12.2 $Date: Mon 2011-12-12 14:09:32 -0600$
## EPICS Base built May 24 2012



Troubleshooting suggestions welcomed.
-- 
Eric Norum
wenorum@lbl.gov


Replies:
Re: Weird behaviour of R3.14.12.2 soft IOC Eric Norum

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