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

Subject: Re: caget randomly returns Channel connect timed out
From: Matt Rippa <mrippa@gemini.edu>
To: Talk EPICS Tech <tech-talk@aps.anl.gov>, Tim Gaggstatter <tgaggstatter@gemini.edu>
Date: Thu, 12 Jul 2018 09:58:08 -1000
My last line, I meant *EPICS_CA_AUTO_ADDR_LIST=YES

-Matt

On Thu, Jul 12, 2018 at 9:54 AM Matt Rippa <mrippa@gemini.edu> wrote:
Hi folks,

We ran a simple caget (once per second) from a linux host to an upgraded IOC. With the new rtems/3.14.12.7 IOC, it often experiences timeouts as shown below. With our legacy vxworks/3.13.9 IOC there are no timeouts logged. Relevant info is shown below. The caRepeater is running on the linux host.

I'm thinking that setting the linux host EPICS_CA_ADDR_LIST=YES may help. I'm running that test now. 

Thank you for any insight,
-Matt 

linux> cat /etc/redhat-release  
CentOS Linux release 7.4.1708 (Core)

linux> uname -a
Linux sbftelops-lv1.cl.gemini.edu 3.10.0-862.el7.x86_64 #1 SMP Fri Apr 20 16:44:24 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux

linux> env |grep EPICS
EPICS=/gemsoft/opt/epics
EPICS_BASE=/gemsoft/opt/epics/base
EPICS_HOST_ARCH=linux-x86_64
EPICS_CA_ADDR_LIST=172.17.2.255 172.17.3.255 172.17.102.130 172.17.105.20 172.16.102.130 aom-vme sbfmcao01.cl.gemini.edu mcao-stealth.cl.gemini.edu 172.17.10
6.111 172.17.105.37 172.17.107.50 172.17.55.101 172.17.101.101 172.17.65.255 172.17.102.139 172.17.102.138

linux> caget tcs:ak:astCtx
tcs:ak:astCtx                  0
linux> caget tcs:ak:astCtx
Channel connect timed out: 'tcs:ak:astCtx' not found.
linux> caget tcs:ak:astCtx
Channel connect timed out: 'tcs:ak:astCtx' not found.
linux> caget tcs:ak:astCtx
tcs:ak:astCtx                  0

Our IOC Telescope Control System (TCS) has recently been updated to:
  • RTEMS 4.10.2
  • EPICS 3.14.12.7
  • MVME 2700 (rtems 2307 bsp)
from:
  • VxWorks 5.4
  • EPICS 3.13.9
  • MVME 2700

New IOC Parameters:
tcs-cp-ioc> epicsPrtEnvParams
EPICS_AR_PORT: 7002
EPICS_CAS_AUTO_BEACON_ADDR_LIST is undefined
EPICS_CAS_BEACON_ADDR_LIST is undefined
EPICS_CAS_BEACON_PERIOD is undefined
EPICS_CAS_BEACON_PORT is undefined
EPICS_CAS_IGNORE_ADDR_LIST is undefined
EPICS_CAS_INTF_ADDR_LIST is undefined
EPICS_CAS_SERVER_PORT is undefined
EPICS_CA_ADDR_LIST: 172.17.65.255 172.17.3.40 172.17.102.138
EPICS_CA_AUTO_ADDR_LIST: YES
EPICS_CA_BEACON_PERIOD: 15.0
EPICS_CA_CONN_TMO: 30.0
EPICS_CA_MAX_ARRAY_BYTES: 16384
EPICS_CA_MAX_SEARCH_PERIOD: 300.0
EPICS_CA_NAME_SERVERS is undefined
EPICS_CA_REPEATER_PORT: 5065
EPICS_CA_SERVER_PORT: 5064
EPICS_CMD_PROTO_PORT is undefined
EPICS_IOC_LOG_FILE_COMMAND is undefined
EPICS_IOC_LOG_FILE_LIMIT: 1000000
EPICS_IOC_LOG_FILE_NAME is undefined
EPICS_IOC_LOG_INET is undefined
EPICS_IOC_LOG_PORT: 7004
EPICS_TIMEZONE: UTC::0::
EPICS_TS_NTP_INET is undefined
IOCSH_HISTSIZE: 20
IOCSH_PS1: tcs-cp-ioc> 

--



--


References:
caget randomly returns Channel connect timed out Matt Rippa

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