When starting up Jenkins 1.549 on FreeBSD, I see this error:

=============================================================================
Feb 08, 2014 2:16:28 AM hudson.UDPBroadcastThread run
WARNING: UDP handling problem
java.net.SocketException: Invalid argument
at java.net.PlainDatagramSocketImpl.join(Native Method)
cketImpl.java:178)
at java.net.MulticastSocket.joinGroup(MulticastSocket.java:319)
at hudson.UDPBroadcastThread.run(UDPBroadcastThread.java:76)

Feb 08, 2014 2:16:28 AM hudson.WebAppMain$3 run
INFO: Jenkins is fully up and running
Feb 08, 2014 2:16:28 AM hudson.DNSMultiCast$1 call
WARNING: Failed to advertise the service to DNS multi-cast
java.net.SocketException: Invalid argument
at java.net.PlainDatagramSocketImpl.join(Native Method)
cketImpl.java:178)
at java.net.MulticastSocket.joinGroup(MulticastSocket.java:319)
at javax.jmdns.impl.JmDNSImpl.openMulticastSocket(JmDNSImpl.java:459)
at javax.jmdns.impl.JmDNSImpl.<init>(JmDNSImpl.java:420)
at javax.jmdns.JmDNS.create(JmDNS.java:60)
at hudson.DNSMultiCast$1.call(DNSMultiCast.java:32)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
at java.util.concurrent.FutureTask.run(FutureTask.java:166)
java:1145)
.java:615)
at java.lang.Thread.run(Thread.java:724)

=============================================================================

There could be a bug in the FreeBSD multicast code, but I need some
help trying to track this down.

If a FreeBSD kernel with all the debug options is compiled and booted,
I see this problem:

http://lists.freebsd.org/pipermail/freebsd-java/2013-August/010312.html

I am a FreeBSD committer so can help with any changes that need to be
made to FreeBSD.