# Unable to connect to Elasticsearch client running locally: receiving 'connection refused' on KOTLIN **URL:** \ **Category:** Elasticsearch\ **Tags:** language-clients\ **Created:** [March 7, 2023, 5:17pm UTC](https://discuss.elastic.co/t/unable-to-connect-to-elasticsearch-client-running-locally-receiving-connection-refused-on-kotlin/327215 "2023-03-07T17:17:55Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![GAETANO\_SIMONELLI](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/gaetano_simonelli/32/118044_2.png) [@GAETANO\_SIMONELLI](https://discuss.elastic.co/u/GAETANO_SIMONELLI)\ **Post date:** [March 7, 2023, 5:17pm UTC](https://discuss.elastic.co/t/unable-to-connect-to-elasticsearch-client-running-locally-receiving-connection-refused-on-kotlin/327215/1 "2023-03-07T17:17:55Z")
I am experiencing connection issues with my Elasticsearch client running locally. Specifically, when I try to connect using localhost in the RestClient.builder, I receive a java.net.connectException: connection refused error, and when I try to use my IP address, I get a timeout error. I have developed two different versions of my test app, one using a low-level REST client and the other using the Java API, both of which were developed using Kotlin for and android application. Despite this, I still receive the same errors. I have included the code for both versions below. Can anyone suggest a solution or help me diagnose the issue? Here are a code snipet to better understand my situation. Code used in the low level rest client: ```auto private fun sendFileStandard() { val restClient = RestClient.builder( HttpHost("192.167.208.131", 9200, "http"), HttpHost("localhost", 9200, "http") ).build() val request = Request( "GET", "/" ) var risultato = "defualt value" doAsync { val cancellable: Cancellable = restClient.performRequestAsync(request, object : ResponseListener { override fun onSuccess(response: Response) { dii("onsuccess", response) risultato = "success" +response.toString() } override fun onFailure(exception: Exception) { dii("onfailure", exception) risultato = "exception" + exception.toString() } }) } dii("risultato", risultato) Thread.sleep(9000) restClient.close(); } ``` the java api ones: ```auto val restClient = RestClient.builder( HttpHost("localhost", 9200) ).build() val transport: ElasticsearchTransport = RestClientTransport( restClient, JacksonJsonpMapper() ) val client = ElasticsearchClient(transport) val input: Reader = StringReader( "{'@timestamp': '2022-04-08T13:55:32Z', 'level': 'warn', 'message': 'Some log message'}" .replace('\'', '"') ) val request = IndexRequest.of { i: IndexRequest.Builder -> i .index("logs") .withJson(input) } doAsync { val response: IndexResponse = client.index(request) } ``` ---
**Author:** ![swallez](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/swallez/32/11972_2.png) [@swallez](https://discuss.elastic.co/u/swallez)\ **Post date:** [March 8, 2023, 3:12pm UTC](https://discuss.elastic.co/t/unable-to-connect-to-elasticsearch-client-running-locally-receiving-connection-refused-on-kotlin/327215/2 "2023-03-08T15:12:33Z")
You should probably use `"https"` instead of `"http"` - see [Connecting | Elasticsearch Java API Client [8.6] | Elastic](https://www.elastic.co/guide/en/elasticsearch/client/java-api-client/current/connecting.html#using-a-secure-connection) Note also that the Java API client uses the RestClient to manage connections, which is why you have started your Java API example by creating a RestClient 😉 ---
**Author:** ![GAETANO\_SIMONELLI](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/gaetano_simonelli/32/118044_2.png) [@GAETANO\_SIMONELLI](https://discuss.elastic.co/u/GAETANO_SIMONELLI)\ **Post date:** [March 8, 2023, 4:05pm UTC](https://discuss.elastic.co/t/unable-to-connect-to-elasticsearch-client-running-locally-receiving-connection-refused-on-kotlin/327215/3 "2023-03-08T16:05:49Z")
if what are you trying to say is that i should replace "http" here with "https" I tried it yet and obtained the same result ```auto val restClient = RestClient.builder( HttpHost("192.167.208.131", 9200, "http"), HttpHost("localhost", 9200, "http") ).build() ``` Otherwise if you are trying to say is that i should configure ssl, autentication and https I don't need those level of securety and I disabled those feature. That's part of the elasticsearch.yml file ```auto # Enable security features xpack.security.enabled: false xpack.security.enrollment.enabled: true # Enable encryption for HTTP API client connections, such as Kibana, Logstash, and Agents xpack.security.http.ssl: enabled: false keystore.path: certs/http.p12 # Enable encryption and mutual authentication between cluster nodes xpack.security.transport.ssl: enabled: false verification_mode: certificate keystore.path: certs/transport.p12 truststore.path: certs/transport.p12 # Create a new cluster with the current node only # Additional nodes can still join the cluster later cluster.initial_master_nodes: ["DESKTOP-29F0DN7"] # Allow HTTP API connections from anywhere # Connections are encrypted and require user authentication http.host: 0.0.0.0 # Allow other nodes to join the cluster from anywhere # Connections are encrypted and mutually authenticated #transport.host: 0.0.0.0 #----------------------- END SECURITY AUTO CONFIGURATION ------------------------- ``` ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [April 5, 2023, 4:06pm UTC](https://discuss.elastic.co/t/unable-to-connect-to-elasticsearch-client-running-locally-receiving-connection-refused-on-kotlin/327215/4 "2023-04-05T16:06:39Z")
This topic was automatically closed 28 days after the last reply. New replies are no longer allowed.