[Building Sakai] Protocol family unavailable error

[David Horwitz]

I sometimes think we will move to IPv6 round the time the IPv8 spec is 
published ;-)

I set the javaopts bellow and it seems to have fixed the issue. Thanks!

D

On 09/06/2012 01:13 PM, Matthew Buckett wrote:
> On Thu, Sep 6, 2012 at 10:08 AM, David Horwitz <david.horwitz at uct.ac.za> wrote:
>>> 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.
> IPv8 wow!
>
> Have you tried telling the JVM to prefer IPv4 stack (system property):
>
> java.net.preferIPv4Stack=true
>
> although it should be using the IPv4 addresses in preference to IPv6
> ones even when using the IPv6 stack, the other one to try is:
>
> java.net.preferIPv6Addresses=false
>