[sprint] indexing failed. System.Net.WebException: Unable to connect to the remote server ---> System.Net.Sockets.SocketException: No connection could be made because the target machine actively refused it 127.0.0.1:9200
   at System.Net.Sockets.Socket.DoConnect(EndPoint endPointSnapshot, SocketAddress socketAddress)
   at System.Net.ServicePoint.ConnectSocketInternal(Boolean connectFailure, Socket s4, Socket s6, Socket& socket, IPAddress& address, ConnectSocketState state, IAsyncResult asyncResult, Exception& exception)
   --- End of inner exception stack trace ---
   at System.Net.HttpWebRequest.GetResponse()
   at Elasticsearch.Net.Connection.HttpConnection.DoSynchronousRequest(HttpWebRequest request, Byte[] data, IRequestConfiguration requestSpecificConfig)
   at Elasticsearch.Net.ExceptionExtensions.RethrowKeepingStackTrace(Exception exception)
   at Elasticsearch.Net.Connection.RequestHandlers.RequestHandler.ReturnStreamOrVoidResponse[T](TransportRequestState`1 requestState, ElasticsearchResponse`1 streamResponse)
   at Elasticsearch.Net.Connection.RequestHandlers.RequestHandler.CoordinateRequest[T](TransportRequestState`1 requestState, Int32 maxRetries, Int32 retried, Boolean& aliveResponse)
   at Elasticsearch.Net.Connection.RequestHandlers.RequestHandler.DoRequest[T](TransportRequestState`1 requestState)
   at Elasticsearch.Net.Connection.RequestHandlers.RequestHandler.Request[T](TransportRequestState`1 requestState, Object data)
   at Elasticsearch.Net.Connection.Transport.DoRequest[T](String method, String path, Object data, IRequestParameters requestParameters)
   at Elasticsearch.Net.ElasticsearchClient.IndicesExists[T](String index, Func`2 requestParameters)
   at Nest.ElasticClient.Nest.IHighLevelToLowLevelDispatcher.Dispatch[D,Q,R](D descriptor, Func`3 dispatch)
   at Diamax.Miliu.Search.Core.Services.ElasticSearch.IndexingService.CheckIndexMapping()
   at Diamax.Miliu.Search.Core.Services.ElasticSearch.IndexingService.IndexAll()
   at Diamax.Miliu.Search.Web.Controllers.Mvc.ProjectController.IndexAll(String tenant)