When you setup a clustered jackrabbit repository, you normally have to manually set a different cluster id for each instance, either in the repository xml config or using the system property org.apache.jackrabbit.core.cluster.node_id (see http://wiki.apache.org/jackrabbit/Clustering ).

It would be nice for users to be able to configure the cluster id directly in magnolia.properties and to have it passed to jackrabbit as a org.apache.jackrabbit.core.cluster.node_id system property during repository initialization in ProviderImpl.