title: Elasticsearch Java API Client
body: <p>I want to run the following java code:</p>
  
  <pre><code>import java.util.Map;
  import org.elasticsearch.action.get.GetResponse;
  import org.elasticsearch.client.Client;
  import org.elasticsearch.node.Node;
  import static org.elasticsearch.node.NodeBuilder.*;
  
  public class MongoDB {
  
  public static void main(String[] args) {
      Node node = nodeBuilder().clusterName("elasticsearch").client(true).node();
      Client client = node.client();
  
  
      node.close();
  }  
  }
  </code></pre>
  
  <p>I've run the mongod with following command:</p>
  
  <pre><code>mongod --port 27017 --replSet rs0
  </code></pre>
  
  <p>Elasticsearch with default conf</p>
  
  <p>And everytime I run my programm I get following error:</p>
  
  <pre><code>Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/lucene/util/Version
    at org.elasticsearch.Version.&lt;clinit&gt;(Version.java:42)
    at org.elasticsearch.Version.&lt;clinit&gt;(Version.java:42)
    at org.elasticsearch.node.internal.InternalNode.&lt;init&gt;(InternalNode.java:129)
    at org.elasticsearch.node.NodeBuilder.build(NodeBuilder.java:159)
    at org.elasticsearch.node.NodeBuilder.node(NodeBuilder.java:166)
    at org.elasticsearch.river.mongodb.MongoDB.main(MongoDB.java:10)
  Caused by: java.lang.ClassNotFoundException: org.apache.lucene.util.Version
    at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
  ... 5 more
  Java Result: 1
  </code></pre>