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

Subject: JCA, Gateways and EPICS_CA_ADDR_LIST
From: "Rees, NP \(Nick\)" <nick.rees@diamond.ac.uk>
To: "EPICS tech-talk" <tech-talk@aps.anl.gov>, "Matej Sekoranja" <matej.sekoranja@cosylab.com>
Cc: "Yuan, F \(Fajin\)" <fajin.yuan@diamond.ac.uk>
Date: Wed, 6 Dec 2006 11:48:19 -0000
We have just encountered what seems to be a significant bug in the
interaction between CAJ and the CAGateways. I am not sure whether this
has been reported before, but I assume someone else must have seen it.

The problem is:

 - If you set com.cosylab.epics.caj.CAJContext.auto_addr_list to TRUE
   it will not resolve PV's being serviced by a local gateway, but will
   resolve PV's from a normal local IOC.

 - If you set auto_addr_list to false and define an explicit addr_list
   then it works, but then addr_list has to contain the addresses of all

   your IOC's (plus the gateway) - and this is impossible to manage.

 - If you set auto_addr_list to true and addr_list to just the gateway,
   this would be a workaround in the C environment but doesn't work in
the
   CAJ environment.

Hence, the only way to get PV's from both gateways and local IOC's is
via the second option, and that requires long, unmanageable IOC lists
that are different on every subnet. 

Has this been seen by anyone? I get the same problems with
caj-1.0.4+jca-2.1.6 and caj-1.1.2:jca-2.3.0. The caget test program is
attached. Any help would be appreciated.

Cheers,

Nick Rees
Principal Software Engineer           Phone: +44 (0)1235-778430
Diamond Light Source                  Fax:   +44 (0)1235-446713

Attachment: JCAGet.java
Description: JCAGet.java


Replies:
Re: JCA, Gateways and EPICS_CA_ADDR_LIST Marty Smith

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