java.lang.ClassNotFoundException: org.elasticsearch.http.AbstractHttpServerTransport

Question

I'm having java.lang.ClassNotFoundException: org.elasticsearch.http.AbstractHttpServerTransport exception while running the project. I'm using elasticsearch-7.3.1.

Gradle File Dependencies:

compile group: 'org.springframework.boot', name: 'spring-boot-starter-data-elasticsearch',version: '2.1.7.RELEASE'
compile group: 'net.java.dev.jna', name: 'jna'
compile group: 'org.elasticsearch.client', name: 'transport',version: '7.3.1'
compile group: 'org.elasticsearch.plugin', name: 'transport-netty4-client', version: '7.3.1'

Client Class:

    @Configuration
    public class Config{
    @Value("${elasticsearch.host:localhost}")
    public String host;
    @Value("${elasticsearch.port:9300}")
    public int port;
    public String getHost() {
        return host;
    }
    public int getPort() {
        return port;
    }
    @Bean
    public Client client(){

        TransportClient client = null;
        try{

             client = new PreBuiltTransportClient(Settings.EMPTY)
                    .addTransportAddress(new TransportAddress(InetAddress.getByName("localhost"), 9300));



        } catch (UnknownHostException e) {
            e.printStackTrace();
        }
        return client;
    }
}

Stack Trace

Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'org.springframework.boot.actuate.autoconfigure.elasticsearch.ElasticSearchClientHealthIndicatorAutoConfiguration': Unsatisfied dependency expressed through constructor parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'client' defined in class path resource [com/techno/homes/search/Config.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.elasticsearch.client.Client]: Factory method 'client' threw exception; nested exception is java.lang.NoClassDefFoundError: org/elasticsearch/http/AbstractHttpServerTransport at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:769) at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:218) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:1341) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1187) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:555) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:515) at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:392) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1321) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1160) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:555) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:515) at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeansOfType(DefaultListableBeanFactory.java:606) at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeansOfType(DefaultListableBeanFactory.java:594) at org.springframework.context.support.AbstractApplicationContext.getBeansOfType(AbstractApplicationContext.java:1226) at org.springframework.boot.actuate.autoconfigure.health.HealthIndicatorRegistryBeans.get(HealthIndicatorRegistryBeans.java:42) at org.springframework.boot.actuate.autoconfigure.health.HealthIndicatorAutoConfiguration.healthIndicatorRegistry(HealthIndicatorAutoConfiguration.java:77) at org.springframework.boot.actuate.autoconfigure.health.HealthIndicatorAutoConfiguration$$EnhancerBySpringCGLIB$$4291cf05.CGLIB$healthIndicatorRegistry$2() at org.springframework.boot.actuate.autoconfigure.health.HealthIndicatorAutoConfiguration$$EnhancerBySpringCGLIB$$4291cf05$$FastClassBySpringCGLIB$$24eb705c.invoke() at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:244) at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:363) at org.springframework.boot.actuate.autoconfigure.health.HealthIndicatorAutoConfiguration$$EnhancerBySpringCGLIB$$4291cf05.healthIndicatorRegistry() at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:566) at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:154) ... 94 more Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'client' defined in class path resource [com/techno/homes/search/Config.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.elasticsearch.client.Client]: Factory method 'client' threw exception; nested exception is java.lang.NoClassDefFoundError: org/elasticsearch/http/AbstractHttpServerTransport at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:627) at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:456) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1321) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1160) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:555) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:515) at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:277) at org.springframework.beans.factory.support.DefaultListableBeanFactory.addCandidateEntry(DefaultListableBeanFactory.java:1467) at org.springframework.beans.factory.support.DefaultListableBeanFactory.findAutowireCandidates(DefaultListableBeanFactory.java:1431) at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveMultipleBeans(DefaultListableBeanFactory.java:1350) at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1209) at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1171) at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:857) at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:760) ... 127 more Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.elasticsearch.client.Client]: Factory method 'client' threw exception; nested exception is java.lang.NoClassDefFoundError: org/elasticsearch/http/AbstractHttpServerTransport at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:185) at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:622) ... 144 more Caused by: java.lang.NoClassDefFoundError: org/elasticsearch/http/AbstractHttpServerTransport at java.base/java.lang.ClassLoader.defineClass1(Native Method) at java.base/java.lang.ClassLoader.defineClass(ClassLoader.java:1016) at java.base/java.security.SecureClassLoader.defineClass(SecureClassLoader.java:174) at java.base/jdk.internal.loader.BuiltinClassLoader.defineClass(BuiltinClassLoader.java:802) at java.base/jdk.internal.loader.BuiltinClassLoader.findClassOnClassPathOrNull(BuiltinClassLoader.java:700) at java.base/jdk.internal.loader.BuiltinClassLoader.loadClassOrNull(BuiltinClassLoader.java:623) at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:581) at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178) at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521) at org.elasticsearch.transport.Netty4Plugin.getSettings(Netty4Plugin.java:52) at org.elasticsearch.plugins.PluginsService.lambda$getPluginSettings$0(PluginsService.java:87) at java.base/java.util.stream.ReferencePipeline$7$1.accept(ReferencePipeline.java:271) at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1654) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:913) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:578) at org.elasticsearch.plugins.PluginsService.getPluginSettings(PluginsService.java:87) at org.elasticsearch.client.transport.TransportClient.buildTemplate(TransportClient.java:145) at org.elasticsearch.client.transport.TransportClient.(TransportClient.java:283) at org.elasticsearch.transport.client.PreBuiltTransportClient.(PreBuiltTransportClient.java:130) at org.elasticsearch.transport.client.PreBuiltTransportClient.(PreBuiltTransportClient.java:116) at org.elasticsearch.transport.client.PreBuiltTransportClient.(PreBuiltTransportClient.java:106) at com.techno.homes.search.Config.client(Config.java:34) at com.techno.homes.search.Config$$EnhancerBySpringCGLIB$$ee00138e.CGLIB$client$0() at com.techno.homes.search.Config$$EnhancerBySpringCGLIB$$ee00138e$$FastClassBySpringCGLIB$$c26abbc4.invoke() at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:244) at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:363) at com.techno.homes.search.Config$$EnhancerBySpringCGLIB$$ee00138e.client() at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:566) at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:154) ... 145 more Caused by: java.lang.ClassNotFoundException: org.elasticsearch.http.AbstractHttpServerTransport at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:583) at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178) at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521) ... I'm working over this for hours but unable to identify the issue. Please help me figure this out

Answer 1

If someone is using version 5.4.0 and is getting this error, just add custom dependency for netty4 solved the issue for me. Before that it was downloading 7.2.0 depency of netty4.

compile group: 'org.elasticsearch.client', name: 'transport', version: '5.4.0'
compile group: 'org.elasticsearch', name: 'elasticsearch', version: '5.4.0'
compile group: 'org.elasticsearch.plugin', name: 'transport-netty4-client', version: '5.4.0'

Answer 2

AbstractHttpServerTransport lives in the server package that is contained in the org.elasticsearch:elasticsearch library, you are only inlcuding the client library.

I would recommend to change your code to use the Rest client as the TransportClient is deprecated in the 7 versions of Elasticsearch and will be removed in version 8. (https://www.elastic.co/guide/en/elasticsearch/client/java-api/current/transport-client.html)