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: The operation has timed out 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.GetResults[T](String alias, String query, Int32 pageSize, Int32 pageNumber, String sourceField, String analyzer, String filterQuery, Boolean isHtmlTemplate)