DatagramSocket delegates to an inner DatagramSocket object. Irrespective of whether datagramSocket is IPv4 or IPv6, we create an IPv6 datagramChannel as its's delegate. So, This can cause problems with operations like joinGroup on AIX.


Tier 2 Test failures :
java/net/MulticastSocket/B6427403.java
java/net/MulticastSocket/NoLoopbackPackets.java
java/net/MulticastSocket/SetLoopbackMode.java
java/net/MulticastSocket/SetOutgoingIf.java
java/net/MulticastSocket/Test.java

Tier 3 Test Failures :
sun/management/jdp/JdpDefaultsTest.java
sun/management/jdp/JdpJmxRemoteDynamicPortTest.java
sun/management/jdp/JdpOffTest.java
sun/management/jdp/JdpSpecificAddressTest.java

Exception in thread "main" java.net.SocketException: joinGroup failed
at java.base/sun.nio.ch.DatagramSocketAdaptor.joinGroup(DatagramSocketAdaptor.java:495)
at java.base/java.net.MulticastSocket.joinGroup(MulticastSocket.java:324)
at MulticastTest.main(MulticastTest.java:16)
Caused by: java.lang.IllegalArgumentException: IPv6 socket cannot join IPv4 multicast group
at java.base/sun.nio.ch.DatagramChannelImpl.innerJoin(DatagramChannelImpl.java:1538)
at java.base/sun.nio.ch.DatagramChannelImpl.join(DatagramChannelImpl.java:1624)
at java.base/sun.nio.ch.DatagramSocketAdaptor.joinGroup(DatagramSocketAdaptor.java:546)
at java.base/sun.nio.ch.DatagramSocketAdaptor.joinGroup(DatagramSocketAdaptor.java:492)
... 2 more