集群环境下java单例查询多了就异常

{
  "query" : {
    "term" : {
      "url" : {
        "value" : "http://www.xinhuanet.com/info/ ... ot%3B,
        "boost" : 1.0
      }
    }
  },
  "sort" : [
    {
      "createDate" : {
        "order" : "desc"
      }
    }
  ]
}

java api 访问多了就抛如下错误
NoNodeAvailableException[None of the configured nodes are available: [{#transport#-1}{lKS_PSd5QfqZsTvMlRv8AA}{127.0.0.1}{127.0.0.1:9302}]]
    at org.elasticsearch.client.transport.TransportClientNodesService.ensureNodesAreAvailable(TransportClientNodesService.java:347)
    at org.elasticsearch.client.transport.TransportClientNodesService.execute(TransportClientNodesService.java:245)
    at org.elasticsearch.client.transport.TransportProxyClient.execute(TransportProxyClient.java:59)
    at org.elasticsearch.client.transport.TransportClient.doExecute(TransportClient.java:363)
    at org.elasticsearch.client.support.AbstractClient.execute(AbstractClient.java:408)
    at org.elasticsearch.action.ActionRequestBuilder.execute(ActionRequestBuilder.java:80)
    at org.elasticsearch.action.ActionRequestBuilder.execute(ActionRequestBuilder.java:54)
    at org.elasticsearch.action.ActionRequestBuilder.get(ActionRequestBuilder.java:62)
    at com.xhgk.spider.spider.servlet.DataService.existsByUrl(DataService.java:244)
    at com.xhgk.spider.spider.servlet.Helper.existsByUrl(Helper.java:330)
    at com.xhgk.spider.spider.servlet.UrlConsumer.recursionUrl(UrlConsumer.java:93)
    at com.xhgk.spider.spider.servlet.UrlConsumer.recursionUrl(UrlConsumer.java:106)
    at com.xhgk.spider.spider.servlet.UrlConsumer.run(UrlConsumer.java:46)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:748)