title: Elasticsearch server starts with following exception
body: <p>I am new to Elasticsearch and AWS ec2 and my elasticsearch server (deployed over AWS EC2 instance) is starting with following exception:</p>
  
  <pre><code>[2015-01-23 06:36:44,919][ERROR][marvel.agent] [elasticnode] exporter [es_exporter] has thrown an exception:
  java.lang.NullPointerException
          at org.elasticsearch.marvel.agent.Utils.extractHostsFromHttpServer(Utils.java:90)
          at org.elasticsearch.marvel.agent.exporter.ESExporter.openAndValidateConnection(ESExporter.java:344)
          at org.elasticsearch.marvel.agent.exporter.ESExporter.openExportingConnection(ESExporter.java:212)
          at org.elasticsearch.marvel.agent.exporter.ESExporter.exportXContent(ESExporter.java:275)
          at org.elasticsearch.marvel.agent.exporter.ESExporter.exportNodeStats(ESExporter.java:173)
          at org.elasticsearch.marvel.agent.AgentService$ExportingWorker.exportNodeStats(AgentService.java:305)
          at org.elasticsearch.marvel.agent.AgentService$ExportingWorker.run(AgentService.java:225)
          at java.lang.Thread.run(Thread.java:745)
  </code></pre>
  
  <p>I am not able to figure out the exact reason for this. Please help me.</p>
  
  <p>Thanks</p>