Experimental Physics and
Industrial Control System

"Hill, Jeff" <[email protected]> · Tue, 25 Sep 2012 01:03:25 +0000

Hi Dirk,

> Jeff, maybe CA should "clean up" the stale sockets instead of waiting
> for TCP to do that (if possible).
>

Currently, the vxWorks system manager can, globally, adjust the timeout 
for such stale circuits, And furthermore I could add a new configuration 
environment variable to CA that sets this parameter specifically for CA 
circuits, but we proceed carefully on this path. Setting this type of 
timeout too short can cause a large EPICS system to not be robust during
periods of network congestion. For example, we prefer for the system to 
recover quickly if the main switches encounter a power glitch.

Jeff

> Dirk
> 
> >
> >> -----Original Message-----
> >> From: [email protected] [mailto:tech-talk-
> [email protected]]
> >> On Behalf Of Wesley Moore
> >> Sent: Wednesday, September 19, 2012 10:19 AM
> >> To: EPICS tech-talk
> >> Subject: CAC problem between RTEMS and vxWorks
> >>
> >> All,
> >>
> >> I'm having issues with a RTEMS client (3.14.11) accessing PVs from a
> >> vxWorks IOC (3.14.8.2).  When the RTEMS IOC is rebooted, sometimes it
> >> doesn't reconnect to the other IOC.  Even after connecting, I'm often
> >> getting timeouts on RTEMS and can't seem to maintain a solid connection
> >> between the two.
> >>
> >> # timeouts on RTEMS client IOC
> >> CAC: Unable to connect because "Connection timed out"
> >> CA.Client.Exception...............................................
> >>     Warning: "Virtual circuit disconnect"
> >>     Context: "iocfel8.acc.jlab.org:5064"
> >>     Source File: ../cac.cpp line 1145
> >>     Current Time: Wed Sep 19 2012 11:52:27.183784942
> >> ..................................................................
> >>
> >> After reboots, It stacks up new socket connections which isn't helping
> >> matters.
> >>
> >> # casr on vxWorks IOC
> >> TCP 129.57.214.101:1024(): User="rtems", V4.11, 4 Channels, Priority=0
> >> TCP 129.57.214.101:1025(): User="rtems", V4.11, 4 Channels, Priority=0
> >> TCP 129.57.214.101:1026(): User="rtems", V4.11, 4 Channels, Priority=0
> >> TCP 129.57.214.101:1027(): User="rtems", V4.11, 4 Channels, Priority=0
> >> TCP 129.57.214.101:1028(): User="rtems", V4.11, 4 Channels, Priority=0
> >> TCP 129.57.214.101:1029(): User="rtems", V4.11, 4 Channels, Priority=0
> >> TCP 129.57.214.101:1030(): User="rtems", V4.11, 4 Channels, Priority=0
> >> TCP 129.57.214.101:1031(): User="rtems", V4.11, 4 Channels, Priority=0
> >>
> >>
> >> Any help is greatly appreciated.
> >>
> >> Wesley
> >
> >

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System