Hi Team.   Please find the below is application log details. Please do needful on this issue 2021-04-08 11:16:27,499 INFO - [main:] ~ Loading atlas-application.properties from file:/root/apache-atlas-2.0.0/conf/atlas-application.properties (ApplicationProperties:123) 2021-04-08 11:16:27,509 INFO - [main:] ~ Using graphdb backend 'janus' (ApplicationProperties:273) 2021-04-08 11:16:27,510 INFO - [main:] ~ Using storage backend 'hbase2' (ApplicationProperties:284) 2021-04-08 11:16:27,510 INFO - [main:] ~ Using index backend 'solr' (ApplicationProperties:295) 2021-04-08 11:16:27,513 INFO - [main:] ~ Setting solr-wait-searcher property 'true' (ApplicationProperties:301) 2021-04-08 11:16:27,513 INFO - [main:] ~ Setting index.search.map-name property 'false' (ApplicationProperties:305) 2021-04-08 11:16:27,513 INFO - [main:] ~ Property (set to default) atlas.graph.cache.db-cache = true (ApplicationProperties:318) 2021-04-08 11:16:27,513 INFO - [main:] ~ Property (set to default) atlas.graph.cache.db-cache-clean-wait = 20 (ApplicationProperties:318) 2021-04-08 11:16:27,513 INFO - [main:] ~ Property (set to default) atlas.graph.cache.db-cache-size = 0.5 (ApplicationProperties:318) 2021-04-08 11:16:27,514 INFO - [main:] ~ Property (set to default) atlas.graph.cache.tx-cache-size = 15000 (ApplicationProperties:318) 2021-04-08 11:16:27,514 INFO - [main:] ~ Property (set to default) atlas.graph.cache.tx-dirty-size = 120 (ApplicationProperties:318) 2021-04-08 11:16:27,537 INFO - [main:] ~ ######################################################################################## Atlas Server (STARTUP) project.name: apache-atlas project.description: Metadata Management and Data Governance Platform over Hadoop build.user: root build.epoch: 1617878818196 project.version: 2.0.0 build.version: 2.0.0 vc.revision: release vc.source.url: scm:git:git://git.apache.org/atlas.git/atlas-webapp ######################################################################################## (Atlas:215) 2021-04-08 11:16:27,537 INFO - [main:] ~ >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> (Atlas:216) 2021-04-08 11:16:27,537 INFO - [main:] ~ Server starting with TLS ? false on port 21000 (Atlas:217) 2021-04-08 11:16:27,537 INFO - [main:] ~ <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< (Atlas:218) 2021-04-08 11:16:28,445 INFO - [main:] ~ No authentication method configured. Defaulting to simple authentication (LoginProcessor:102) 2021-04-08 11:16:28,591 WARN - [main:] ~ Unable to load native-hadoop library for your platform... using builtin-java classes where applicable (NativeCodeLoader:60) 2021-04-08 11:16:28,618 INFO - [main:] ~ Logged in user root (auth:SIMPLE) (LoginProcessor:77) 2021-04-08 11:16:29,102 INFO - [main:] ~ Not running setup per configuration atlas.server.run.setup.on.start. (SetupSteps$SetupRequired:189) 2021-04-08 11:16:53,718 WARN - [main:] ~ org.apache.solr.client.solrj.impl.Krb5HttpClientBuilder is configured without specifying system property 'java.security.auth.login.config' (Krb5HttpClientBuilder:142) 2021-04-08 11:16:54,047 INFO - [main:] ~ Failed to obtain graph instance, retrying 3 times, error: java.lang.IllegalArgumentException: Could not instantiate implementation: org.janusgraph.diskstorage.solr.Solr6Index (AtlasGraphProvider:100) 2021-04-08 11:17:24,369 WARN - [main:] ~ org.apache.solr.client.solrj.impl.Krb5HttpClientBuilder is configured without specifying system property 'java.security.auth.login.config' (Krb5HttpClientBuilder:142) 2021-04-08 11:17:24,379 WARN - [main:] ~ Failed to obtain graph instance on attempt 1 of 3 (AtlasGraphProvider:118) java.lang.IllegalArgumentException: Could not instantiate implementation: org.janusgraph.diskstorage.solr.Solr6Index at org.janusgraph.util.system.ConfigurationUtil.instantiate(ConfigurationUtil.java:64) at org.janusgraph.diskstorage.Backend.getImplementationClass(Backend.java:476) at org.janusgraph.diskstorage.Backend.getIndexes(Backend.java:463) at org.janusgraph.diskstorage.Backend.<init>(Backend.java:148) at org.janusgraph.graphdb.configuration.GraphDatabaseConfiguration.getBackend(GraphDatabaseConfiguration.java:1840) at org.janusgraph.graphdb.database.StandardJanusGraph.<init>(StandardJanusGraph.java:138) at org.janusgraph.core.JanusGraphFactory.open(JanusGraphFactory.java:160) at org.janusgraph.core.JanusGraphFactory.open(JanusGraphFactory.java:131) at org.janusgraph.core.JanusGraphFactory.open(JanusGraphFactory.java:111) at org.apache.atlas.repository.graphdb.janus.AtlasJanusGraphDatabase.getGraphInstance(AtlasJanusGraphDatabase.java:165) at org.apache.atlas.repository.graphdb.janus.AtlasJanusGraphDatabase.getGraph(AtlasJanusGraphDatabase.java:263) at org.apache.atlas.repository.graph.AtlasGraphProvider.getGraphInstance(AtlasGraphProvider.java:52) at org.apache.atlas.repository.graph.AtlasGraphProvider.retry(AtlasGraphProvider.java:114) at org.apache.atlas.repository.graph.AtlasGraphProvider.get(AtlasGraphProvider.java:102) at org.apache.atlas.repository.graph.AtlasGraphProvider$$EnhancerBySpringCGLIB$$ddd7ec69.CGLIB$get$1(<generated>) at org.apache.atlas.repository.graph.AtlasGraphProvider$$EnhancerBySpringCGLIB$$ddd7ec69$$FastClassBySpringCGLIB$$35af08e.invoke(<generated>) at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:228) at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:358) at org.apache.atlas.repository.graph.AtlasGraphProvider$$EnhancerBySpringCGLIB$$ddd7ec69.get(<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:1181) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1075) 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:312) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:308) 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.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:835) at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:741) at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:189) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:1201) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1103) 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:312) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:308) 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.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:835) at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:741) at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:189) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:1201) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1103) 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:312) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:308) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202) at org.springframework.aop.framework.autoproxy.BeanFactoryAdvisorRetrievalHelper.findAdvisorBeans(BeanFactoryAdvisorRetrievalHelper.java:92) at org.springframework.aop.framework.autoproxy.AbstractAdvisorAutoProxyCreator.findCandidateAdvisors(AbstractAdvisorAutoProxyCreator.java:102) at org.springframework.aop.aspectj.autoproxy.AspectJAwareAdvisorAutoProxyCreator.shouldSkip(AspectJAwareAdvisorAutoProxyCreator.java:103) at org.springframework.aop.framework.autoproxy.AbstractAutoProxyCreator.postProcessBeforeInstantiation(AbstractAutoProxyCreator.java:248) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsBeforeInstantiation(AbstractAutowireCapableBeanFactory.java:1045) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.resolveBeforeInstantiation(AbstractAutowireCapableBeanFactory.java:1019) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:473) at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:312) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:308) 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.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:443) at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:325) at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:107) at org.apache.atlas.web.setup.KerberosAwareListener.contextInitialized(KerberosAwareListener.java:31) at org.eclipse.jetty.server.handler.ContextHandler.callContextInitialized(ContextHandler.java:843) at org.eclipse.jetty.servlet.ServletContextHandler.callContextInitialized(ServletContextHandler.java:533) at org.eclipse.jetty.server.handler.ContextHandler.startContext(ContextHandler.java:816) at org.eclipse.jetty.servlet.ServletContextHandler.startContext(ServletContextHandler.java:345) at org.eclipse.jetty.webapp.WebAppContext.startWebapp(WebAppContext.java:1404) at org.eclipse.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1366) at org.eclipse.jetty.server.handler.ContextHandler.doStart(ContextHandler.java:778) at org.eclipse.jetty.servlet.ServletContextHandler.doStart(ServletContextHandler.java:262) at org.eclipse.jetty.webapp.WebAppContext.doStart(WebAppContext.java:520)   ... 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