org.elasticsearch.common.transport.InetSocketTransportAddress not found on Elasticsearch 6
Elastic search 6.0 has removed InetSocketTransportAddress class. I have solved this By replacing InetSocketTransportAddress class with TransportAddress class.
// on startup
TransportClient client = new PreBuiltTransportClient(Settings.EMPTY)
.addTransportAddress(new TransportAddress(InetAddress.getByName("host1"), 9300))
.addTransportAddress(new TransportAddress(InetAddress.getByName("host2"), 9300));
// on shutdown
client.close();