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C L U S T E R I N G

In farming with 3.0.0 FINAL, if you shut down one instance of JBoss gracefully,

any farmed deployments on that node will undeploy across the entire cluster.  Do a

kill  9. This has been fixed in 3.0.1 and later versions.

If all else fails

If all else fails then you must use a non multicast communication stack for JavaGroups.

Modify the  PartitionProperties  attribute to have the following JavaGroups communication

stack.  For TCPPING, put your own hosts and ports (host[port]) in for the initial_hosts

parameter.  DO NOT put a given node's own name in this list.  So, each machine's config

may have to be different.  Check out the JavaGroups documentation at their website for

more configuration information:

http://www.javagroups.com/

         name="jboss:service=DefaultPartition">

    jboss:service=HASessionState

    jboss:service=HAJNDI

TCP(start_port=7800):TCPPING(initial_hosts=

frodo[7800],gandalf[7800]

;port_range=5;ti

meout=3000;num_initial_members=3;up_thread=true;down_thread=true):VERIFY_SUSPECT(tim

eout=1500;down_thread=false;up_thread=false):pbcast.STABLE(desired_avg_gossip=20000;

down_thread=false;up_thread=false):pbcast.NAKACK(down_thread=true;up_thread=true;gc_

lag=100;retransmit_timeout=3000):pbcast.GMS(join_timeout=5000;join_retry_timeout=200

0;shun=false;print_local_addr=false;down_thread=true;up_thread=true)

Advanced Configurations

The creators of JBoss Clustering have written detailed documentation that is available for

purchase on the JBoss web site.  This document goes into the detailed design of JBoss's

clustering features and also describes how you can fine tune your cluster enabled

applications.  It is a must read for anybody wanting to do serious clustering work.

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