Client is Timing Out Using Multicast Discovery

Issue

There are numerous exceptions in the client log files:

javax.naming.CommunicationException: Receive timed out [Root exception is java.net.SocketTimeoutException: Receive timed out]
    at org.jnp.interfaces.NamingContext.discoverServer(NamingContext.java:1678)
    at org.jnp.interfaces.NamingContext.checkRef(NamingContext.java:1783)
    at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:693)
    at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:686)
    at javax.naming.InitialContext.lookup(InitialContext.java:392)
    at com.redhat.gss.service.ejb30.GssSlsbClient.main(GssSlsbClient.java:38)
Caused by: java.net.SocketTimeoutException: Receive timed out
    at java.net.PlainDatagramSocketImpl.receive0(Native Method)
    at java.net.PlainDatagramSocketImpl.receive(PlainDatagramSocketImpl.java:145)
    at java.net.DatagramSocket.receive(DatagramSocket.java:725)
    at org.jnp.interfaces.NamingContext.discoverServer(NamingContext.java:1647)
    ... 5 more