All Stream Sockets where you specify an bind address (different from InAddrAny
aka "::" or 0.0.0.0) are only bound to a single address family. You can't bind
a single listening socket to a dual stack localhost IP Address.
getLoopbackAddress is either ::1 or 127.0.0.1 (depending on the stack
preferemces) and InetAddress.getByName("localhost") is also one of both (but
not necesarily the same, unfortunately). This happened to me in the past, so I
wanted to make sure that asumption does not show up in sample code of JavaDocs.
Thanks for improving this!
Bernd
Am 22.08.2013 um 10:54 schrieb Alan Bateman <[email protected]>:
> On 22/08/2013 01:58, Stuart Marks wrote:
>> Hi all,
>>
>> Please review this small documentation change to the example I added to
>> RMISocketFactory a couple weeks ago [1]. This change fixes a problem that
>> Bernd Eckenfels pointed out [2] where the interface returned by
>> getLoopbackAddress() might not match the interface that "localhost" resolves
>> to.
> We don't have support for IPv4-only or IPv6-only listeners (at least not with
> stream oriented sockets, there is support for protocol specific datagram
> sockets but that doesn't apply here). So I'm curious about the original
> comments and whether there are configurations or loopback address plumbing
> where getLoopbackAddress doesn't do the right thing?
>
> -Alan
