Experimental Physics and Industrial Control System
> Does anyone use EPICS_CA_ADDR_LIST environment variable in R3.12Beta13?
> I installed R3.12.0Beta13CEBAF on our HP-WS. ca_test cannot find a channel
> on IOC. The older version of ca_test , which also uses EPICS_CA_ADDR_LIST
> variable , can find the channel. In our configuration, IOC's and OPI's
> belong differenct sub-nets and channel search by bradcast will not work.
>
A known problem with R3.12.0Beta13 occurs when all of the following
are true.
o The server receives a channel name resolution (search) UDP request
from off subnet
o There isnt a route in vxWorks to the sender of this request
In this situation the UDP task discovers the error and suspends itself
rather than continuing to service requests as it should.
Symptoms:
o No route to destination message on the IOC's console and in the log file.
o Suspended CA UDP task in the IOC.
o IOC's CA server stops receiving new connections.
Work Around
o Add a default route to your IOC:
hostAdd "myrouter", "N.N.N.N"
routeAdd "0", "myrouter"
Type "netstat -r" on a UNIX host to determine the
address of a router.
We have known about this problem for awhile but have been discouraged from
checking a patch into CVS until an official release of R3.12.1 occurred.
I suggest that APS create a CVS branch so that fixes of this nature can
be applied to R3.12.2 (while future EPICS development continues on the
main CVS branch).
Otherwise there are no known problems with the use of EPICS_CA_ADDR_LIST.
Jeff
______________________________________________________________________
Jeffrey O. Hill Internet [email protected]
LANL MS H820 Voice 505 665 1831
Los Alamos, NM 87545 USA FAX 505 665 5107
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