// try to bootstrap metadata from bootstrapUrl
config.setBootstrapUrls(bootstrapURL);
SocketStoreClientFactory factory = new SocketStoreClientFactory(config);
// get Cluster from bootStrapUrl
String clusterXml = factory.bootstrapMetadataWithRetries(MetadataStore.CLUSTER_KEY,
factory.validateUrls(config.getBootstrapUrls()));
// release all threads/sockets hold by the factory.
factory.close();
return clusterMapper.readCluster(new StringReader(clusterXml), false);
}