We are having trouble using JBC Habanero version 2.0.0.0 GA for enabling Distributed Caching. The error encountered as appearing in the log is as :

Nov 2, 2007 6:00:07 AM org.jgroups.protocols.TP$IncomingPacket run
WARNING: packet from a.b.c.d:45564 has different version (0.0.0) from ours (2.5.0). Packet is discarded

Tomcat 5.5.20, Multicast

Starting Catalina with the following option to avoid the "Problem creating sockets" :

-Djava.net.preferIPv4Stack=true

What I am trying to do is, use JBC for distributing cache over the Tomcats cluster established with multicasting. The steps followed were :

1. modified ip address & port for the UDP/mcastaddr and port in replSync-service.xml

2. commented off transaction manager tag in the xml, as we dont have the requirement for Transactional Caching

3. created a client that would enable/initialize the JBC caching :

CacheFactory factory = DefaultCacheFactory.getInstance();

cache = factory.createCache(<url of the replSync-service.xml>);

Whats happening is :

1. JGroups seems to be doing whats required as I see the following in the log :

INFO: JGroups version: 2.5.0

-------------------------------------------------------
GMS: address is a.b.c.d:32838

2. And further the following is logged :

    INFO: viewAccepted(): [a.b.c.d:32838|0] [a.b.c.d:32838]
    Nov 2, 2007 6:00:06 AM org.jboss.cache.CacheImpl internalStart
    INFO: CacheImpl local address is a.b.c.d:32838
    Nov 2, 2007 6:00:06 AM org.jboss.cache.CacheImpl internalStart
    INFO: JBoss Cache version: JBossCache 'Habanero' 2.0.0.GA[ $Id: Version.java,v 1.35 2007/08/01 16:52:13 msurtani Exp $]
    Nov 2, 2007 6:00:07 AM org.apache.catalina.cluster.mcast.McastServiceImpl$ReceiverThread run
    WARNING: Error receiving mcast package. Sleeping 500ms
        java.lang.ArrayIndexOutOfBoundsException
         at java.lang.System.arraycopy(Native Method)
         at org.apache.catalina.cluster.mcast.McastMember.getMember(McastMember.java:174)
         at org.apache.catalina.cluster.mcast.McastServiceImpl.receive(McastServiceImpl.java:210)
         at org.apache.catalina.cluster.mcast.McastServiceImpl$ReceiverThread.run(McastServiceImpl.java:254)
    Nov 2, 2007 6:00:07 AM org.jgroups.protocols.TP$IncomingPacket run
    WARNING: packet from a.b.c.d:45564 has different version (0.0.0) from ours (2.5.0). Packet is discarded

3. Is the observed error ignorable ?

4. I have not started the other node in the cluster as there are hundreds of lines appearing in the log with Packet discarded message.

Have I done enough, or missing something obvious as the documents do direct us to do just the above.