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The cluster setup is based on the Infinispan cluster configuration, via JGroups.

Steps for clustering on the same machine:

1. Build fcrepo-webapp.
2. Copy fcrepo-webapp/target/fcrepo-webapp.war to a second location, we shall call this webapp2.
3. Configure a different web port for the second jar.
4. Configure another activeMQ port
   
   1. Under src/main/resource/config/activemq.xml
   2. Under transport, change the port to a nearby number.

5. In webapp1, execute:

    export MAVEN_OPTS="-Djgroups.tcp.address=127.0.0.1 -Djgroups.tcp.port=7800 -Djgroups.tcpping.initial_hosts=127.0.0.1[7800],127.0.0.1[7801] -Djava.net.preferIPv4Stack=true"

    mvn -Djetty.port=8888 jetty:run

6. In webapp2, execute:

    export MAVEN_OPTS="-Djgroups.tcp.address=127.0.0.1 -Djgroups.tcp.port=7801 -Djgroups.tcpping.initial_hosts=127.0.0.1[7800],127.0.0.1[7801] -Djava.net.preferIPv4Stack=true"

    mvn -Djetty.port=8889 jetty:run

7. Look for the message "Received new cluster view"

Steps for clustering with others:

1. In fcrepo-webapp:

    export MAVEN_OPTS="-Dfcrepo.ispn.jgroups.configuration=jgroups-udp.xml -Djava.net.preferIPv4Stack=true"

    mvn -Djetty.port=

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1. 8889 jetty:run