title: Elasticsearch reindex error - client request timeout
body: <p>I am trying to reindex using following line:</p>
  
  <pre><code>POST _reindex
  {
    "source": {
      "index": "poi_201705"
    },
    "dest": {
      "index": "poi_dev_2"
    }
  }
  </code></pre>
  
  <p>But I am getting following error in kibana console:</p>
  
  <pre><code>{
    "statusCode": 504,
    "error": "Gateway Time-out",
    "message": "Client request timeout"
  }
  </code></pre>
  
  <p>Can anybody tell me what is this issue and how can get rid of it.</p>