i face much problems even executing the first lines of code.
I get an java.net.UnknownHostException that says "Der angegebene Host ist unbekannt (
https://xxx.yyyzzz.com
)" which translates to "The specified host is unknown (
https://xxx.yyyzzz.com
)".
I replaced our companies url with xxx.yyyzzz.
Screenshot 2022-05-27 081134
1263×881 75 KB
But actually the server is reachable in the browser, and ping is okay, too:
Screenshot 2022-05-27 082659
1153×253 12.2 KB
How to solve?
Thanks - Enomine
Welcome!
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It would be great if you could update your post to solve this.
Here a first guess is that you might have a firewall or a proxy?
public void createClient() throws Exception {
// https://www.elastic.co/guide/en/elasticsearch/client/java-api-client/current/connecting.html
// Create the low-level client
RestClient restClient = RestClient.builder(new HttpHost("https://gattinger-second.es.europe-west1.gcp.cloud.es.io", 9243)).build();
// Create the transport with a Jackson mapper
ElasticsearchTransport transport = new RestClientTransport(restClient, new JacksonJsonpMapper());
// And create the API client
ElasticsearchClient client = new ElasticsearchClient(transport);
SearchResponse<Product> search = client.search(s -> s.index("products").query(q -> q.term(t -> t.field("name").value(v -> v.stringValue("bicycle")))), Product.class);
// SearchResponse<Product> search2 = client.search
for (Hit<Product> hit : search.hits().hits()) {
processProduct(hit.source());
private void processProduct(Product p) {
System.out.println("ConnectingText -> process Product -> " + p.getName() + " " + p.getPrice() + " " + p.getSku() + " " + p.getClass());
* Licensed to Elasticsearch B.V. under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch B.V. licenses this file to you under
* the Apache License, Version 2.0 (the "License"); you may
* not use this file except in compliance with the License.
* You may obtain a copy of the License at
* http://www.apache.org/licenses/LICENSE-2.0
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
package usage;
public class Product {
private String sku;
private String name;
private double price;
public Product() {
public Product(String sku, String name, double price) {
this.sku = sku;
this.name = name;
this.price = price;
public String getSku() {
return sku;
public void setSku(String sku) {
this.sku = sku;
public String getName() {
return name;
public void setName(String name) {
this.name = name;
public double getPrice() {
return this.price;
public void setPrice(double price) {
this.price = price;
Exception in thread "main" java.io.IOException: Der angegebene Host ist unbekannt (https://gattinger-second.es.europe-west1.gcp.cloud.es.io)
at org.elasticsearch.client.RestClient.extractAndWrapCause(RestClient.java:923)
at org.elasticsearch.client.RestClient.performRequest(RestClient.java:299)
at org.elasticsearch.client.RestClient.performRequest(RestClient.java:287)
at co.elastic.clients.transport.rest_client.RestClientTransport.performRequest(RestClientTransport.java:146)
at co.elastic.clients.elasticsearch.ElasticsearchClient.search(ElasticsearchClient.java:1502)
at co.elastic.clients.elasticsearch.ElasticsearchClient.search(ElasticsearchClient.java:1519)
at getting_started.ConnectingTest.createClient(ConnectingTest.java:53)
at main.Main.main(Main.java:9)
Caused by: java.net.UnknownHostException: Der angegebene Host ist unbekannt (https://gattinger-second.es.europe-west1.gcp.cloud.es.io)
at java.base/java.net.Inet6AddressImpl.lookupAllHostAddr(Native Method)
at java.base/java.net.InetAddress$PlatformNameService.lookupAllHostAddr(InetAddress.java:933)
at java.base/java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1519)
at java.base/java.net.InetAddress$NameServiceAddresses.get(InetAddress.java:852)
at java.base/java.net.InetAddress.getAllByName0(InetAddress.java:1509)
at java.base/java.net.InetAddress.getAllByName(InetAddress.java:1367)
at java.base/java.net.InetAddress.getAllByName(InetAddress.java:1301)
at org.apache.http.impl.conn.SystemDefaultDnsResolver.resolve(SystemDefaultDnsResolver.java:45)
at org.apache.http.impl.nio.conn.PoolingNHttpClientConnectionManager$InternalAddressResolver.resolveRemoteAddress(PoolingNHttpClientConnectionManager.java:664)
at org.apache.http.impl.nio.conn.PoolingNHttpClientConnectionManager$InternalAddressResolver.resolveRemoteAddress(PoolingNHttpClientConnectionManager.java:635)
at org.apache.http.nio.pool.AbstractNIOConnPool.processPendingRequest(AbstractNIOConnPool.java:474)
at org.apache.http.nio.pool.AbstractNIOConnPool.lease(AbstractNIOConnPool.java:280)
at org.apache.http.impl.nio.conn.PoolingNHttpClientConnectionManager.requestConnection(PoolingNHttpClientConnectionManager.java:295)
at org.apache.http.impl.nio.client.AbstractClientExchangeHandler.requestConnection(AbstractClientExchangeHandler.java:377)
at org.apache.http.impl.nio.client.DefaultClientExchangeHandlerImpl.start(DefaultClientExchangeHandlerImpl.java:129)
at org.apache.http.impl.nio.client.InternalHttpAsyncClient.execute(InternalHttpAsyncClient.java:141)
at org.elasticsearch.client.RestClient.performRequest(RestClient.java:295)
... 6 more
Exception in thread "main" co.elastic.clients.elasticsearch._types.ElasticsearchException: [es/search] failed: [security_exception] missing authentication credentials for REST request [/products/_search?typed_keys=true]
at co.elastic.clients.transport.rest_client.RestClientTransport.getHighLevelResponse(RestClientTransport.java:281)
at co.elastic.clients.transport.rest_client.RestClientTransport.performRequest(RestClientTransport.java:147)
at co.elastic.clients.elasticsearch.ElasticsearchClient.search(ElasticsearchClient.java:1502)
at co.elastic.clients.elasticsearch.ElasticsearchClient.search(ElasticsearchClient.java:1519)
at getting_started.ConnectingTest.createClient(ConnectingTest.java:53)
at main.Main.main(Main.java:9)
