The error is not specific to CSS or BOY.
Your example is in CAJ, the pure Java Channel Access library.
There can be related issues with Java network code in general.
I've seen similar errors when the Java network code could not get the DNS name for the local host.
In all these cases, checking the log can help.
From: firstname.lastname@example.org [email@example.com] On Behalf Of Paul Sichta [firstname.lastname@example.org]
Sent: Wednesday, January 30, 2013 12:51 PM
Subject: CSS addr_list bug
A colleague discovered strange behavior today, where only some of our
IOC's were connecting with a BOY display. In CSS
Preferences->CSS_Core->EPICS, in the addr_list field, I enter the
names of my IOC's. I de-select the auto_addr_list.
If I mistype or put a name there which isn't resolved in our DNS,
every IOC after that in the list will not connect (after restarting
CSS). I get the error below in the CSS Console. If the IOC is simply
down, then all others in the list connect normally, as expected.
2013-01-30 12:26:39.664 SEVERE [Thread 11]
com.cosylab.epics.caj.impl.BroadcastTransport (send) -
java.io.IOException: Target address not resolved
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