Elasticsearch.Net.ElasticsearchClientException: Maximum number of retries reached, failed over to all the known alive nodes before failing. Call: Status code unknown from: HEAD / ---> Elasticsearch.Net.PipelineException: Failed to ping the specified node. ---> Elasticsearch.Net.PipelineException: An error occurred trying to read the response from the specified node. ---> 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 10.60.9.25:9201 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.HttpWebRequestConnection.Request[TResponse](RequestData requestData) --- End of inner exception stack trace --- at Elasticsearch.Net.RequestPipeline.Ping(Node node) --- End of inner exception stack trace --- at Elasticsearch.Net.RequestPipeline.Ping(Node node) at Elasticsearch.Net.Transport`1.Ping(IRequestPipeline pipeline, Node node) at Elasticsearch.Net.Transport`1.Request[TResponse](HttpMethod method, String path, PostData data, IRequestParameters requestParameters) --- End of inner exception stack trace --- at Elasticsearch.Net.Transport`1.HandleElasticsearchClientException(RequestData data, Exception clientException, IElasticsearchResponse response) at Elasticsearch.Net.Transport`1.FinalizeResponse[TResponse](RequestData requestData, IRequestPipeline pipeline, List`1 seenExceptions, TResponse response) at Elasticsearch.Net.Transport`1.Request[TResponse](HttpMethod method, String path, PostData data, IRequestParameters requestParameters) at Nest.Specification.IndicesApi.IndicesNamespace.GetAlias(Indices index, Func`2 selector) at Nest.IndicesPointingToAliasExtensions.GetIndicesPointingToAlias(IElasticClient client, Names alias) at SearchAccessLayer.ElasticSocket.GetContentResults(String alias, String[] typeId, String query, String paraQuery, Int32 pageSize, Int32 pageNumber, String sourceField, String analyzer, Boolean isHtmlTemplate)