Disables IPv6 harvesters, no reason given

[dpocock]

The TURN server has both an A record and an AAAA record for IPv6.

When the DNS lookup returns the AAAA record, ice4j just logs the following:

I/dateHarvesterSetElement(11673): Disabling: TURN harvester(srvr: [2001:67c:1388:1001::6]:3478/udp)

and doesn't try to use the relay at all. The log message comes from the class CandidateHarvesterSetElement, it has been truncated in the log message.

The device where it is running is an Android device and IPv6 is working on the device (it is on a dual IPv4 and IPv6 wifi)

When it disables the candidate in this way, it doesn't make any effort to find the A record and use that instead, so it ends up with no relay at all.