[Building Sakai] Protocol family unavailable error

[David Horwitz]

Hi Gang,

I'm seeing a number of errors like the one bellow from from calendar 
subscriptions


> 2012-09-06 10:58:48,064 ERROR TP-Processor28 
> org.sakaiproject.calendar.impl.BaseExternalCalendarSubscriptionService 
> - Unable to read calendar subscription 
> '/calendar/ical/*************%40group.calendar.google.com/public/basic.ics' 
> from URL (I/O Error): 
> https://www.google.com/calendar/ical/rv9klcp1bn06etdd4aarcm735c%40group.calendar.google.com/public/basic.ics
> java.net.SocketException: Protocol family unavailable


All seem to be from Google. Now googling and looking at our config I 
suspect that this is IPv6 related - the DNS lookup is returning  an IPv6 
address but our Vula nodes don't have IPv8 support.

Has anyone else seen this? (and  have a workaround?