JBoss Clustering with Microsoft Network Load Balancing

Jboss configuration
Changes in jboss-service.xml
C:\Server\jboss-4.2.2\server\all\deploy\jboss-web-cluster.sar\META-INF\jboss-service.xml
1) delete <Config> <UDP> .... </Config>
2) paste the following code to the same area of deleted code.
The initial_hosts highlighted bellow is to specify other server's IP.
3) Sample jboss-service.xml is located in “NLB Manager PrintScreen & Config File” folder

<config>
<TCP start_port="7810" loopback="true" bind_addr="${bind.address}"
tcp_nodelay="true"
recv_buf_size="20000000"
send_buf_size="640000"
discard_incompatible_packets="true"
enable_bundling="false"
max_bundle_size="64000"
max_bundle_timeout="30"
use_incoming_packet_handler="true"
use_outgoing_packet_handler="false"
down_thread="false" up_thread="false"
use_send_queues="false"
sock_conn_timeout="300"
skip_suspected_members="true"/>
<TCPPING initial_hosts="192.168.0.7[7810]" port_range="3"
timeout="3000"
down_thread="false" up_thread="false"
num_initial_members="3"/>
<MERGE2 max_interval="100000"
down_thread="false" up_thread="false" min_interval="20000"/>
<FD_SOCK down_thread="false" up_thread="false"/>
<FD timeout="10000" max_tries="5" down_thread="false" up_thread="false" shun="true"/>
<VERIFY_SUSPECT timeout="1500" down_thread="false" up_thread="false"/>
<pbcast.NAKACK max_xmit_size="60000"
use_mcast_xmit="false" gc_lag="0"
retransmit_timeout="300,600,1200,2400,4800"
down_thread="false" up_thread="false"
discard_delivered_msgs="true"/>
<pbcast.STABLE stability_delay="1000" desired_avg_gossip="50000"
down_thread="false" up_thread="false"
max_bytes="400000"/>
<pbcast.GMS print_local_addr="true" join_timeout="3000"
down_thread="false" up_thread="false"
join_retry_timeout="2000" shun="true"
view_bundling="true"/>
<FC max_credits="2000000" down_thread="false" up_thread="false"
min_threshold="0.10"/>
<FRAG2 frag_size="60000" down_thread="false" up_thread="false"/>
<pbcast.STATE_TRANSFER down_thread="false" up_thread="false" use_flush="false"/>
</config>

4) change REPL_ASYNC to REPL_SYNC
<attribute name="CacheMode">REPL_SYNC</attribute>

Changes in cluster-service.xml
C:\Server\jboss-4.2.3.GA\server\all\deploy\cluster-service.xml
1) delete <Config> <UDP> .... </Config>
2) paste the following code to the same area of deleted code.
The initial_hosts highlighted bellow is to specify other server's IP.

<Config>
<TCP start_port="7800" loopback="true" bind_addr="${bind.address}"
tcp_nodelay="true"
recv_buf_size="20000000"
send_buf_size="640000"
discard_incompatible_packets="true"
enable_bundling="false"
max_bundle_size="64000"
max_bundle_timeout="30"
use_incoming_packet_handler="true"
use_outgoing_packet_handler="false"
down_thread="false" up_thread="false"
use_send_queues="false"
sock_conn_timeout="300"
skip_suspected_members="true"/>
<TCPPING initial_hosts="192.168.0.7[7800]" port_range="3"
timeout="3000"
down_thread="false" up_thread="false"
num_initial_members="3"/>
<MERGE2 max_interval="100000"
down_thread="false" up_thread="false" min_interval="20000"/>
<FD_SOCK down_thread="false" up_thread="false"/>
<FD timeout="10000" max_tries="5" down_thread="false" up_thread="false" shun="true"/>
<VERIFY_SUSPECT timeout="1500" down_thread="false" up_thread="false"/>
<pbcast.NAKACK max_xmit_size="60000"
use_mcast_xmit="false" gc_lag="0"
retransmit_timeout="300,600,1200,2400,4800"
down_thread="false" up_thread="false"
discard_delivered_msgs="true"/>
<pbcast.STABLE stability_delay="1000" desired_avg_gossip="50000"
down_thread="false" up_thread="false"
max_bytes="400000"/>
<pbcast.GMS print_local_addr="true" join_timeout="3000"
down_thread="false" up_thread="false"
join_retry_timeout="2000" shun="true"
view_bundling="true"/>
<pbcast.STATE_TRANSFER down_thread="false" up_thread="false" use_flush="false"/>
</Config>

</attribute>
<depends>jboss:service=Naming</depends>
</mbean>

3) replace the HAJNDI portion with following code. Highlighted word is the only changes.

<mbean code="org.jboss.ha.jndi.HANamingService"
name="jboss:service=HAJNDI">
<!-- We now inject the partition into the HAJNDI service instead
of requiring that the partition name be passed -->
<depends optional-attribute-name="ClusterPartition"
proxy-type="attribute">jboss:service=${jboss.partition.name:DefaultPartition}</depends>
<!-- Bind address of bootstrap and HA-JNDI RMI endpoints -->
<attribute name="BindAddress">${bind.address}</attribute>
<!-- Port on which the HA-JNDI stub is made available -->
<attribute name="Port">1100</attribute>
<!-- RmiPort to be used by the HA-JNDI service once bound. 0 => auto. -->
<attribute name="RmiPort">1101</attribute>
<!-- Accept backlog of the bootstrap socket -->
<attribute name="Backlog">50</attribute>
<!-- The thread pool service used to control the bootstrap and
auto discovery lookups -->
<depends optional-attribute-name="LookupPool"
proxy-type="attribute">jboss.system:service=ThreadPool</depends>

<!-- A flag to disable the auto discovery via multicast -->
<attribute name="DiscoveryDisabled">false</attribute>
<!-- Set the auto-discovery bootstrap multicast bind address. If not
specified and a BindAddress is specified, the BindAddress will be used. -->
<attribute name="AutoDiscoveryBindAddress">${bind.address}</attribute>
<!-- Multicast Address and group port used for auto-discovery -->
<attribute name="AutoDiscoveryAddress">${jboss.partition.udpGroup:230.0.0.4}</attribute>
<attribute name="AutoDiscoveryGroup">1102</attribute>
<!-- The TTL (time-to-live) for autodiscovery IP multicast packets -->
<attribute name="AutoDiscoveryTTL">16</attribute>
<!-- The load balancing policy for HA-JNDI -->
<attribute name="LoadBalancePolicy">org.jboss.ha.framework.interfaces.RoundRobin</attribute>

<!-- Client socket factory to be used for client-server
RMI invocations during JNDI queries
<attribute name="ClientSocketFactory">custom</attribute>
-->
<!-- Server socket factory to be used for client-server
RMI invocations during JNDI queries
<attribute name="ServerSocketFactory">custom</attribute>
-->
</mbean>

4) Sample cluster-service.xml is located in “NLB Manager PrintScreen & Config File” folder

Start your Jboss with the following command line.
Located in NLB Manager PrintScreen & Config File/runCluster.bat.
Modify the highlighted IP. 192.168.0.225 is virtual IP and 192.168.0.7 is local IP.
run -Dignore.bind.address=true -b 192.168.0.225 -Dbind.address=192.168.0.7 -c all

Change URL of GWT output

One of the issue in gwt is the url. If your package of app.gwt.xml is in com.y2bid.gwt, then your url of html output from compiler will be http://127.0.0.1/com.y2bid.gwt.app/index. Is it not nice!!! Inorder to avoid the package become URL you can choose the following methods.

3 Methods
1) < module rename-to="app" > . This way will give you a bit problem in hosted mode because of the url different and problem with your url in web.xml

2) Create new package and inherit the actual gwt.xml file.

3) Compiled all to javascript then rename the folder. This will cause you hard to do testing with your server if you have url mapping in web.xml

Conclusion
Method No. 2 is the best to fulfill all the need(Testing in hosted mode and deploy).