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java.lang.NoClassDefFoundError: org/springframework/core/log/LogAccessor on spring-kafka 2.2.5

Spring boot application to implement Kafka consumer getting following error while running the application.
While running the application I am getting classNotFoundException.
I have added following dependencies in pom.xml
org.springframework
spring-core
5.2.0.RELEASE
com.fasterxml.jackson.core
jackson-core
2.10.0
com.fasterxml.jackson.core
jackson-databind
2.10.0
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1228)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1127)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:535)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:495)
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:317)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:315)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:204)
at org.springframework.context.support.PostProcessorRegistrationDelegate.registerBeanPostProcessors(PostProcessorRegistrationDelegate.java:224)
at org.springframework.context.support.AbstractApplicationContext.registerBeanPostProcessors(AbstractApplicationContext.java:708)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:533)
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:142)
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:754)
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:386)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:307)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1242)
at com.daimler.daivb.core.DaivbSpringApplication.run(DaivbSpringApplication.java:61)
at com.daimler.daivb.core.DaivbSpringApplication.run(DaivbSpringApplication.java:39)
at com.daimler.daivb.msc.MbappsSnapTrafficRestrictionsServiceApplication.main(MbappsSnapTrafficRestrictionsServiceApplication.java:24)
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.kafka.annotation.KafkaListenerAnnotationBeanPostProcessor]: Constructor threw exception; nested exception is java.lang.NoClassDefFoundError: org/springframework/core/log/LogAccessor
at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:182)
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:87)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1220)
... 18 common frames omitted
Caused by: java.lang.NoClassDefFoundError: org/springframework/core/log/LogAccessor
at org.springframework.kafka.annotation.KafkaListenerAnnotationBeanPostProcessor.<init>(KafkaListenerAnnotationBeanPostProcessor.java:169)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:170)
... 20 common frames omitted
Caused by: java.lang.ClassNotFoundException: org.springframework.core.log.LogAccessor
at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
at java.lang.ClassLoader.loadClass(ClassLoader.java:418)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:352)
at java.lang.ClassLoader.loadClass(ClassLoader.java:351)
... 26 common frames omitted```

Unable to start Spring application ClassFormatError: Truncated class file

What does this error mean exactly? I tried running this on other computer with older JDK versions and I don't get this issue. I also tried installing latest Eclipse version. Could it be a JDK bug? My JDK version is Java 8 1.8.0_171
2021-05-21 15:47:39 [main] ERROR o.s.boot.SpringApplication - Application run failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'cxf' defined in class path resource [META-INF/cxf/cxf.xml]: Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.apache.cxf.bus.spring.SpringBus]: Constructor threw exception; nested exception is java.lang.ClassFormatError: Truncated class file
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1320)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1214)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:557)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:517)
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:323)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:321)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:879)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:878)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:550)
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:141)
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:747)
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:315)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1215)
at com.example.application.SomApolloIntegrationLauncher.main(SomApolloIntegrationLauncher.java:48)
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.apache.cxf.bus.spring.SpringBus]: Constructor threw exception; nested exception is java.lang.ClassFormatError: Truncated class file
at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:216)
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:87)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1312)
... 17 common frames omitted
Caused by: java.lang.ClassFormatError: Truncated class file
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:763)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:467)
at java.net.URLClassLoader.access$100(URLClassLoader.java:73)
at java.net.URLClassLoader$1.run(URLClassLoader.java:368)
at java.net.URLClassLoader$1.run(URLClassLoader.java:362)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:361)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at org.apache.cxf.common.util.ReflectionUtil.setAccessible(ReflectionUtil.java:182)
at org.apache.cxf.common.injection.ResourceInjector.processable(ResourceInjector.java:102)
at org.apache.cxf.common.injection.ResourceInjector.inject(ResourceInjector.java:120)
at org.apache.cxf.common.injection.ResourceInjector.inject(ResourceInjector.java:116)
at org.apache.cxf.bus.extension.ExtensionManagerImpl.loadAndRegister(ExtensionManagerImpl.java:227)
at org.apache.cxf.bus.extension.ExtensionManagerImpl.activateAllByType(ExtensionManagerImpl.java:142)
at org.apache.cxf.bus.extension.ExtensionManagerBus.<init>(ExtensionManagerBus.java:145)
at org.apache.cxf.bus.extension.ExtensionManagerBus.<init>(ExtensionManagerBus.java:157)
at org.apache.cxf.bus.spring.SpringBus.<init>(SpringBus.java:44)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:203)
... 19 common frames omitted
Which class file is truncated? Maybe it's permission issues?

It means that no byte code was found in the class file. Can you open the class file in a decompiler?

Check your cxf version.Maybe using previous cxf version solve problem

Error with FF4J configuration in spring boot project

I am trying to use FF4J in my project, and i have added following dependencies to my build.gradle file.
org.ff4j:ff4j-spring-boot-starter:1.8.7,
org.ff4j:ff4j-web:1.8.7
I am observing below error during server startup after adding these dependencies:
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'api' defined in class path resource [org/ff4j/spring/boot/web/api/config/FF4jSwaggerConfig.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [springfox.documentation.spring.web.plugins.Docket]: Factory method 'api' threw exception; nested exception is java.lang.NoSuchMethodError: springfox.documentation.service.ApiInfo.<init>(Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Lspringfox/documentation/service/Contact;Ljava/lang/String;Ljava/lang/String;Ljava/util/Collection;)V
at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:599)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1128)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1022)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:512)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482)
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:754)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:866)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:542)
at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:122)
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:761)
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:371)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:315)
at com.adp.mnc.gcc.das.GCCDataAccessServiceSpringBootApplication.main(GCCDataAccessServiceSpringBootApplication.java:89)
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.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49)
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [springfox.documentation.spring.web.plugins.Docket]: Factory method 'api' threw exception; nested exception is java.lang.NoSuchMethodError: springfox.documentation.service.ApiInfo.<init>(Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Lspringfox/documentation/service/Contact;Ljava/lang/String;Ljava/lang/String;Ljava/util/Collection;)V
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:189)
at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:588)
... 21 common frames omitted
Caused by: java.lang.NoSuchMethodError: springfox.documentation.service.ApiInfo.<init>(Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Lspringfox/documentation/service/Contact;Ljava/lang/String;Ljava/lang/String;Ljava/util/Collection;)V
at org.ff4j.spring.boot.web.api.config.FF4jSwaggerConfig.apiInfo(FF4jSwaggerConfig.kt:57)
at org.ff4j.spring.boot.web.api.config.FF4jSwaggerConfig.api(FF4jSwaggerConfig.kt:52)
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)
... 22 common frames omitted
I guess this issue with version compatibility between FF4J and Springfox. The springfox version i am using is 2.4.0. I tried with multiple combinations, however, left with no clue.
Please check and help. Thanks.

I can confirm that current version of ff4j is using the Swagger 3.0.0 which seems not backward compatible with 2.4.0.
Multiple options:
The spring-boot-starter should be used when you exposing the REST-API and webconsole. This component should be in standalone component without your code. Then in microservices you import ff4j library only with the store you need sample code and video
You update your spring-fox dependency.

What if I can't find the jks file in Jar file on Spring JPA Gradle Project?

I am currently issuing a Jwt token. Currently, I am using jks file to issue and certify Jwt token. There are no problems with testing in the local environment.
However, converting to a JAR file results in an error that the jks file cannot be found. What's the reason?
I use build.gradle and application.yml.
build.gradle
plugins {
id 'org.springframework.boot' version '2.2.4.RELEASE'
id 'io.spring.dependency-management' version '1.0.9.RELEASE'
id 'java'
}
group = 'com.springboard.testing'
version = '0.0.1-SNAPSHOT'
sourceCompatibility = '1.8'
configurations {
developmentOnly
runtimeClasspath {
extendsFrom developmentOnly
}
compileOnly {
extendsFrom annotationProcessor
}
}
repositories {
mavenCentral()
maven {
url = 'https://mvn.trabricks.io/content/repositories/m2/'
}
maven {
url = 'http://repo.maven.apache.org/maven2'
}
jcenter()
maven { url 'http://oss.jfrog.org/artifactory/oss-snapshot-local/' }
}
bootJar {
archiveBaseName = '-'
archiveFileName = 'jinheeproject.jar'
archiveVersion = "0.0.1"
}
//resource 파일 바라보게 추가
sourceSets {
main {
resources {
srcDirs "src/main/resources", "src/main/configs"
}
}
}
dependencies {
compile group: 'org.springframework.boot', name: 'spring-boot-maven-plugin', version: '2.2.5.RELEASE'
implementation 'com.google.code.gson:gson:2.8.6'
implementation 'org.springframework.boot:spring-boot-starter-web'
testCompile 'org.springframework.boot:spring-boot-starter-test'
runtimeOnly 'mysql:mysql-connector-java'
implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
compile 'org.springframework.boot:spring-boot-starter-security'
annotationProcessor 'org.projectlombok:lombok'
compileOnly 'org.projectlombok:lombok'
compile group: 'org.hibernate', name: 'hibernate-core', version: '5.4.12.Final'
compile group: 'org.hibernate', name: 'hibernate-entitymanager', version: '5.4.12.Final'
implementation 'org.springframework.cloud:spring-cloud-starter-security:2.1.2.RELEASE'
implementation 'org.springframework.cloud:spring-cloud-starter-oauth2:2.1.2.RELEASE'
compile group: 'org.springframework.security', name: 'spring-security-oauth2-client', version: '5.2.2.RELEASE'
}
As you can see from my build.gradle file, I have set it to view the resource file. But the error doesn't change. I think it's hard to figure out what's wrong.
error log
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.security.oauth2.config.annotation.web.configuration.AuthorizationServerEndpointsConfiguration': Invocation of init method failed; nested exception is java.lang.IllegalStateException: Cannot configure enpdoints
at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeInitialization(InitDestroyAnnotationBeanPostProcessor.java:160) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsBeforeInitialization(AbstractAutowireCapableBeanFactory.java:416) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1788) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:595) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:517) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:323) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:321) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:879) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:878) ~[spring-context-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:550) ~[spring-context-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:141) ~[spring-boot-2.2.4.RELEASE.jar!/:2.2.4.RELEASE]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:747) [spring-boot-2.2.4.RELEASE.jar!/:2.2.4.RELEASE]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397) [spring-boot-2.2.4.RELEASE.jar!/:2.2.4.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:315) [spring-boot-2.2.4.RELEASE.jar!/:2.2.4.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226) [spring-boot-2.2.4.RELEASE.jar!/:2.2.4.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1215) [spring-boot-2.2.4.RELEASE.jar!/:2.2.4.RELEASE]
at com.springboard.backend.Application.main(Application.java:21) [classes!/:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_242]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_242]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_242]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_242]
at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:48) [jinheeproject.jar:na]
at org.springframework.boot.loader.Launcher.launch(Launcher.java:87) [jinheeproject.jar:na]
at org.springframework.boot.loader.Launcher.launch(Launcher.java:51) [jinheeproject.jar:na]
at org.springframework.boot.loader.JarLauncher.main(JarLauncher.java:52) [jinheeproject.jar:na]
Caused by: java.lang.IllegalStateException: Cannot configure enpdoints
at org.springframework.security.oauth2.config.annotation.web.configuration.AuthorizationServerEndpointsConfiguration.init(AuthorizationServerEndpointsConfiguration.java:81) ~[spring-security-oauth2-2.3.4.RELEASE.jar!/:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_242]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_242]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_242]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_242]
at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleElement.invoke(InitDestroyAnnotationBeanPostProcessor.java:389) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleMetadata.invokeInitMethods(InitDestroyAnnotationBeanPostProcessor.java:333) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeInitialization(InitDestroyAnnotationBeanPostProcessor.java:157) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
... 26 common frames omitted
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'jwtAccessTokenConverter' defined in class path resource [com/springboard/backend/config/Oauth2AuthorizationServerConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.security.oauth2.provider.token.store.JwtAccessTokenConverter]: Factory method 'jwtAccessTokenConverter' threw exception; nested exception is java.lang.IllegalStateException: Cannot load keys from store: file [/Users/username/git/springGradle/build/libs/src/main/resources/oauth2jwt.jks]
at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:656) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:484) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1338) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1177) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:557) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:517) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:323) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:321) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.resolveBeanReference(ConfigurationClassEnhancer.java:394) ~[spring-context-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:366) ~[spring-context-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
at com.springboard.backend.config.Oauth2AuthorizationServerConfiguration$$EnhancerBySpringCGLIB$$dcf97348.jwtAccessTokenConverter(<generated>) ~[classes!/:na]
at com.springboard.backend.config.Oauth2AuthorizationServerConfiguration.configure(Oauth2AuthorizationServerConfiguration.java:96) ~[classes!/:na]
at org.springframework.security.oauth2.config.annotation.web.configuration.AuthorizationServerEndpointsConfiguration.init(AuthorizationServerEndpointsConfiguration.java:79) ~[spring-security-oauth2-2.3.4.RELEASE.jar!/:na]
... 33 common frames omitted
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.security.oauth2.provider.token.store.JwtAccessTokenConverter]: Factory method 'jwtAccessTokenConverter' threw exception; nested exception is java.lang.IllegalStateException: Cannot load keys from store: file [/Users/username/git/springGradle/build/libs/src/main/resources/oauth2jwt.jks]
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:185) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:651) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
... 47 common frames omitted
Caused by: java.lang.IllegalStateException: Cannot load keys from store: file [/Users/username/git/springGradle/build/libs/src/main/resources/oauth2jwt.jks]
at org.springframework.security.oauth2.provider.token.store.KeyStoreKeyFactory.getKeyPair(KeyStoreKeyFactory.java:67) ~[spring-security-oauth2-2.3.4.RELEASE.jar!/:na]
at org.springframework.security.oauth2.provider.token.store.KeyStoreKeyFactory.getKeyPair(KeyStoreKeyFactory.java:48) ~[spring-security-oauth2-2.3.4.RELEASE.jar!/:na]
at com.springboard.backend.config.Oauth2AuthorizationServerConfiguration.jwtAccessTokenConverter(Oauth2AuthorizationServerConfiguration.java:64) ~[classes!/:na]
at com.springboard.backend.config.Oauth2AuthorizationServerConfiguration$$EnhancerBySpringCGLIB$$dcf97348.CGLIB$jwtAccessTokenConverter$3(<generated>) ~[classes!/:na]
at com.springboard.backend.config.Oauth2AuthorizationServerConfiguration$$EnhancerBySpringCGLIB$$dcf97348$$FastClassBySpringCGLIB$$e9c01fa6.invoke(<generated>) ~[classes!/:na]
at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:244) ~[spring-core-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:363) ~[spring-context-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
at com.springboard.backend.config.Oauth2AuthorizationServerConfiguration$$EnhancerBySpringCGLIB$$dcf97348.jwtAccessTokenConverter(<generated>) ~[classes!/:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_242]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_242]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_242]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_242]
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:154) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
... 48 common frames omitted
Caused by: java.io.FileNotFoundException: src/main/resources/oauth2jwt.jks
at org.springframework.core.io.FileSystemResource.getInputStream(FileSystemResource.java:189) ~[spring-core-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
at org.springframework.security.oauth2.provider.token.store.KeyStoreKeyFactory.getKeyPair(KeyStoreKeyFactory.java:57) ~[spring-security-oauth2-2.3.4.RELEASE.jar!/:na]
... 60 common frames omitted
file path
my use code
#Bean
public JwtAccessTokenConverter jwtAccessTokenConverter() {
KeyStoreKeyFactory keyStoreKeyFactory = new KeyStoreKeyFactory(new FileSystemResource("src/main/resources/oauth2jwt.jks"), "oauth2jwtpass".toCharArray());
JwtAccessTokenConverter converter = new JwtAccessTokenConverter();
converter.setKeyPair(keyStoreKeyFactory.getKeyPair("oauth2jwt"));
return converter;
}

This should fix the problem. You were using a FileSystemResource instead of ClassPathResource. Might be a compilation error, I didn't check. A CLassPathResource is necessary because you're accessing a file inside of a jar (sometimes) and not just a system file.
This could be helpful.
#Bean
public JwtAccessTokenConverter jwtAccessTokenConverter() {
KeyStoreKeyFactory keyStoreKeyFactory = new KeyStoreKeyFactory(new ClassPathResource("oauth2jwt.jks", getClass().getClassLoader()), "oauth2jwtpass".toCharArray());
JwtAccessTokenConverter converter = new JwtAccessTokenConverter();
converter.setKeyPair(keyStoreKeyFactory.getKeyPair("oauth2jwt"));
return converter;
}

I solved the problem by referring to Jason's link.
import org.springframework.core.io.Resource;
#Value("classpath:oauth2jwt.jks")
Resource resourceFile;
#Bean
public JwtAccessTokenConverter jwtAccessTokenConverter() {
KeyStoreKeyFactory keyStoreKeyFactory = new KeyStoreKeyFactory(resourceFile, "oauth2jwtpass".toCharArray());
JwtAccessTokenConverter converter = new JwtAccessTokenConverter();
converter.setKeyPair(keyStoreKeyFactory.getKeyPair("oauth2jwt"));
return converter;
}

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

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

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'

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)