Hi please oblige and review the following change http://cr.openjdk.java.net/~msheppar/8077377/webrev/
to address the issue https://bugs.openjdk.java.net/browse/JDK-8077377it is possible that "stray" packets can be received in this MulticastSocket test, and this results in a NPE from the NetworkInterface lookup based on the received address.
Change adds a test that the "from" NetworkInterface is not null. regards Mark