IPv6 multicast binding (Bugs: JDK-8210493 JDK-8215294)

[Alan Bateman]

On 02/05/2019 10:33, Andre Naujoks wrote:
> :
> I just wanted to notify you, that the whole issue with binding to a
> multicast address is not Linux specific.
Understood as it's always been platform specific as to whether you could 
bind to a multicast address. This is one of the reason why we've had a 
recommendation in the API docs for several years to bind to the wildcard 
address and use the join methods to join the multicast group. This helps 
with the portability but has been problematic on Linux due to the 
"interference" issue. We had hoped that IP_MULTICAST_ALL had solved that 
but alas no. Once IPV6_MULTICAST_ALL is more widely available then we 
should try to make use of it.
>
> We are currently trying to reproduce the original issue with the
> reception of all multicast traffic on windows and will get back to you
> about that.
>
Thanks, I don't think we've seen this issue on any other platforms.

-Alan