Elasticsearch使用TransportClient索引数据时，服务器报错。java.io.IOException: 远程主机强迫关闭了一个现有的连接

Elasticsearch使用Client索引数据时，数据正常存储服务也不报错。
Elasticsearch使用TransportClient索引数据时，数据能够正常存储但是Elasticsearch 日志中报错：java.io.IOException: 远程主机强迫关闭了一个现有的连接
而且一下就报了14次。
有没有大神帮忙解决下
版本：Elasticsearch-1.7.5
代码：
import static org.elasticsearch.node.NodeBuilder.*;
import static org.elasticsearch.common.xcontent.XContentFactory.*;
import org.elasticsearch.action.index.IndexResponse;
import org.elasticsearch.client.Client;
import org.elasticsearch.client.transport.TransportClient;
import org.elasticsearch.common.settings.ImmutableSettings;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.transport.InetSocketTransportAddress;
import org.elasticsearch.node.Node;
 
Settings settings = ImmutableSettings.settingsBuilder()
  .put("client.transport.sniff", true)
  .build();
TransportClient client = new TransportClient(settings)
  .addTransportAddress(new InetSocketTransportAddress("localhost", 9300));
IndexResponse response = client.prepareIndex("twitter", "tweet", "5")
  .setSource(jsonBuilder()
    .startObject()
    .field("name", "ceshi5")
    .endObject()    
    )
  .execute()
  .actionGet();
boolean created = response.isCreated();
System.out.println(created);