if (revisionName == null) {
String msg = "Revision not specified.";
throw new ClusterException(msg);
}
try {
instanceRevision = new FileRevision(new File(revisionName));
journal = (Journal) jc.newInstance();
journal.init(clusterNodeId, clusterContext.getNamespaceResovler());
journal.register(this);
} catch (ConfigurationException e) {