Hi, I have been working with elasticsearch for about a year now in development using version 7.1 and the high level rest client (java), deployed my application to azure and created a free trial elastic deployment but unable to create index or make any request at all.
It keeps giving me the unknownHostException
Hey,
can you share some code, a full exception stack trace instead of just a part of it?
Thank you!
--Alex
This is how I am building my restclient
private synchronized RestHighLevelClient buildClient() {
log.info("Trying to connect to elastic <<<<<<<<<<<<<<<<<<<<<<<<<<");
try {
if (restHighLevelClient == null) {
final CredentialsProvider credentialsProvider =new BasicCredentialsProvider();
credentialsProvider.setCredentials(AuthScope.ANY,new UsernamePasswordCredentials("myusername", "mypassword"));
RestClientBuilder builder = RestClient.builder(new HttpHost(esHost, esPort));
builder.setHttpClientConfigCallback(httpClientBuilder -> httpClientBuilder.setDefaultCredentialsProvider(credentialsProvider));
restHighLevelClient = new RestHighLevelClient(builder);
log.info("Connected Elasticsearch.... >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>");
}
} catch (Exception e) {
log.error(e.getMessage());
}
return restHighLevelClient;
}
and this is where I try to create an index
private boolean createIndex(String indexName) {
Assert.notNull(indexName, "No index defined");
CreateIndexRequest request = new CreateIndexRequest(indexName);
try {
CreateIndexResponse response = restHighLevelClient.indices().create(request, RequestOptions.DEFAULT);
return response.isAcknowledged();
} catch (Exception e) {
throw new ElasticsearchException("Failed to create index " + indexName, e);
}
}
When I do this with localhost it works fine but with the elastic cloud instance I get this
java.io.IOException: https://link-to-my-elastic.azurewebsites.com
at org.elasticsearch.client.RestClient.extractAndWrapCause(RestClient.java:809)
at org.elasticsearch.client.RestClient.performRequest(RestClient.java:225)
at org.elasticsearch.client.RestClient.performRequest(RestClient.java:212)
at ai.test.elasticsearch.config.ElasticConfig.client(ElasticConfig.java:58)
at ai.test.elasticsearch.config.ElasticConfig$$EnhancerBySpringCGLIB$$a39d9fd2.CGLIB$client$2(<generated>)
at ai.test.elasticsearch.config.ElasticConfig$$EnhancerBySpringCGLIB$$a39d9fd2$$FastClassBySpringCGLIB$$aed02abf.invoke(<generated>)
at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:228)
at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:358)
at ai.test.elasticsearch.config.ElasticConfig$$EnhancerBySpringCGLIB$$a39d9fd2.client(<generated>)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:162)
at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:588)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1173)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1067)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:513)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202)
at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:208)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1138)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1066)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:585)
at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:88)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:366)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1264)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:553)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:761)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:867)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:543)
at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:122)
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:693)
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:360)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:303)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1118)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1107)
at ai.test.elasticsearch.Application.main(Application.java:12)
Caused by: java.net.UnknownHostException: https://mylink at java.net.Inet6AddressImpl.lookupAllHostAddr(Native Method)
at java.net.InetAddress$2.lookupAllHostAddr(InetAddress.java:928)
at java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1323)
at java.net.InetAddress.getAllByName0(InetAddress.java:1276)
at java.net.InetAddress.getAllByName(InetAddress.java:1192)
at java.net.InetAddress.getAllByName(InetAddress.java:1126)
at org.apache.http.impl.conn.SystemDefaultDnsResolver.resolve(SystemDefaultDnsResolver.java:45)
at org.apache.http.impl.nio.conn.PoolingNHttpClientConnectionManager$InternalAddressResolver.resolveRemoteAddress(PoolingNHttpClientConnectionManager.java:637)
at org.apache.http.impl.nio.conn.PoolingNHttpClientConnectionManager$InternalAddressResolver.resolveRemoteAddress(PoolingNHttpClientConnectionManager.java:608)
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:268)
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:221)
... 44 moreThere seems to be an issue with your application and DNS resolution - or more likely with the ability to do DNS resolution on that host.
Can you check that? Or just try with the IP address and see if that works as a first step to rule out DNS?
Okay. if this is a DNS resolution issue then can you suggest a fix cause I cannot connect both on my local machine and on the deployed app.
Thanks
Hey,
this is impossible to tell without any further knowledge about your local setup, why your local DNS is not working. This is why I suggested not using DNS names but IP adresses, to check if this is a DNS issue or maybe a more complex routing problem, that you cannot reach the elasticsearch instance from your app.
--Alex
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