Getting NullPointerException while opening test scenario in RHPAM 7.6?

Issue

• Getting exception popup in Business Central UI "Unable to complete your request. The following exception occurred: null." and below exception in logs.

2020-07-17 10:18:25,659 ERROR [org.guvnor.common.services.backend.exceptions.ExceptionUtilities] (default task-7) Exception thrown: null: org.guvnor.common.services.shared.exceptions.GenericPortableException
    at org.guvnor.common.services.backend.exceptions.ExceptionUtilities.handleException(ExceptionUtilities.java:46)
    at org.kie.workbench.common.services.datamodel.backend.server.DataModelServiceImpl.getDataModel(DataModelServiceImpl.java:74)
    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.jboss.weld.bean.proxy.AbstractBeanInstance.invoke(AbstractBeanInstance.java:38)
    at org.jboss.weld.bean.proxy.ProxyMethodHandler.invoke(ProxyMethodHandler.java:106)
    at org.kie.workbench.common.services.datamodel.backend.server.service.DataModelService$1985021824$Proxy$_$$_WeldClientProxy.getDataModel(Unknown Source)
    at org.drools.workbench.screens.scenariosimulation.backend.server.ScenarioSimulationServiceImpl.constructContent(ScenarioSimulationServiceImpl.java:225)
    at org.drools.workbench.screens.scenariosimulation.backend.server.ScenarioSimulationServiceImpl.constructContent(ScenarioSimulationServiceImpl.java:85)
    at org.kie.workbench.common.services.backend.service.KieService.loadContent(KieService.java:80)
    at org.drools.workbench.screens.scenariosimulation.backend.server.ScenarioSimulationServiceImpl.loadContent(ScenarioSimulationServiceImpl.java:85)
    at org.drools.workbench.screens.scenariosimulation.backend.server.ScenarioSimulationServiceImpl$Proxy$_$$_WeldClientProxy.loadContent(Unknown Source)
    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.jboss.errai.bus.server.io.AbstractRPCMethodCallback.invokeMethodFromMessage(AbstractRPCMethodCallback.java:65)
    at org.jboss.errai.bus.server.io.ValueReplyRPCEndpointCallback.callback(ValueReplyRPCEndpointCallback.java:40)
    at org.jboss.errai.bus.server.io.RemoteServiceCallback.callback(RemoteServiceCallback.java:54)
    at org.jboss.errai.cdi.server.CDIExtensionPoints$2.callback(CDIExtensionPoints.java:448)
    at org.jboss.errai.bus.server.DeliveryPlan.deliver(DeliveryPlan.java:47)
    at org.jboss.errai.bus.server.ServerMessageBusImpl.sendGlobal(ServerMessageBusImpl.java:297)
    at org.jboss.errai.bus.server.SimpleDispatcher.dispatchGlobal(SimpleDispatcher.java:46)
    at org.jboss.errai.bus.server.service.ErraiServiceImpl.store(ErraiServiceImpl.java:96)
    at org.jboss.errai.bus.server.service.ErraiServiceImpl.store(ErraiServiceImpl.java:113)
    at org.jboss.errai.bus.server.servlet.DefaultBlockingServlet.doPost(DefaultBlockingServlet.java:144)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:706)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:791)
    at io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:74)
    at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:129)
    at io.undertow.websockets.jsr.JsrWebSocketFilter.doFilter(JsrWebSocketFilter.java:173)
    at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61)
    at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)
    at org.uberfire.ext.security.server.SecureHeadersFilter.doFilter(SecureHeadersFilter.java:110)
    at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61)
    at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)
    at org.uberfire.ext.security.server.SecurityIntegrationFilter.doFilter(SecurityIntegrationFilter.java:70)
    at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61)
    at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)
    at io.opentracing.contrib.jaxrs2.server.SpanFinishingFilter.doFilter(SpanFinishingFilter.java:55)
    at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61)
    at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)
    at io.undertow.servlet.handlers.FilterHandler.handleRequest(FilterHandler.java:84)
    at io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:62)
    at io.undertow.servlet.handlers.ServletChain$1.handleRequest(ServletChain.java:68)
    at io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36)
    at org.wildfly.extension.undertow.security.SecurityContextAssociationHandler.handleRequest(SecurityContextAssociationHandler.java:78)
    at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
    at io.undertow.servlet.handlers.RedirectDirHandler.handleRequest(RedirectDirHandler.java:68)
    at io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:132)
    at io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:57)
    at io.undertow.server.handlers.DisableCacheHandler.handleRequest(DisableCacheHandler.java:33)
    at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
    at io.undertow.security.handlers.AuthenticationConstraintHandler.handleRequest(AuthenticationConstraintHandler.java:53)
    at io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:46)
    at io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:64)
    at io.undertow.servlet.handlers.security.ServletSecurityConstraintHandler.handleRequest(ServletSecurityConstraintHandler.java:59)
    at io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:60)
    at io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:77)
    at io.undertow.security.handlers.NotificationReceiverHandler.handleRequest(NotificationReceiverHandler.java:50)
    at io.undertow.security.handlers.AbstractSecurityContextAssociationHandler.handleRequest(AbstractSecurityContextAssociationHandler.java:43)
    at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
    at org.wildfly.extension.undertow.security.jacc.JACCContextIdHandler.handleRequest(JACCContextIdHandler.java:61)
    at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
    at org.wildfly.extension.undertow.deployment.GlobalRequestControllerHandler.handleRequest(GlobalRequestControllerHandler.java:68)
    at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
    at io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:269)
    at io.undertow.servlet.handlers.ServletInitialHandler.access$100(ServletInitialHandler.java:78)
    at io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:133)
    at io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:130)
    at io.undertow.servlet.core.ServletRequestContextThreadSetupAction$1.call(ServletRequestContextThreadSetupAction.java:48)
    at io.undertow.servlet.core.ContextClassLoaderSetupAction$1.call(ContextClassLoaderSetupAction.java:43)
    at org.wildfly.extension.undertow.security.SecurityContextThreadSetupAction.lambda$create$0(SecurityContextThreadSetupAction.java:105)
    at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1504)
    at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1504)
    at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1504)
    at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1504)
    at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:249)
    at io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:78)
    at io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:99)
    at io.undertow.server.Connectors.executeRootHandler(Connectors.java:376)
    at io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:830)
    at org.jboss.threads.ContextClassLoaderSavingRunnable.run(ContextClassLoaderSavingRunnable.java:35)
    at org.jboss.threads.EnhancedQueueExecutor.safeRun(EnhancedQueueExecutor.java:1985)
    at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.doRunTask(EnhancedQueueExecutor.java:1487)
    at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.run(EnhancedQueueExecutor.java:1378)
    at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.NullPointerException
    at org.kie.scanner.KieModuleMetaDataImpl.getTypeMetaInfo(KieModuleMetaDataImpl.java:126)
    at org.kie.workbench.common.services.backend.builder.core.TypeSourceResolver.isDeclaredInDRL(TypeSourceResolver.java:49)
    at org.kie.workbench.common.services.backend.builder.core.TypeSourceResolver.getTypeSource(TypeSourceResolver.java:35)
    at org.kie.workbench.common.services.datamodel.backend.server.cache.ModuleDataModelOracleBuilderProvider$InnerBuilder.resolveTypeSource(ModuleDataModelOracleBuilderProvider.java:173)
    at org.kie.workbench.common.services.datamodel.backend.server.builder.projects.BaseFactBuilder.buildTypeSources(BaseFactBuilder.java:141)
    at org.kie.workbench.common.services.datamodel.backend.server.builder.projects.BaseFactBuilder.build(BaseFactBuilder.java:109)
    at org.kie.workbench.common.services.datamodel.backend.server.builder.projects.ClassFactBuilder.build(ClassFactBuilder.java:79)
    at org.kie.workbench.common.services.datamodel.backend.server.builder.projects.ModuleDataModelOracleBuilder.loadFactTypes(ModuleDataModelOracleBuilder.java:164)
    at org.kie.workbench.common.services.datamodel.backend.server.builder.projects.ModuleDataModelOracleBuilder.build(ModuleDataModelOracleBuilder.java:146)
    at org.kie.workbench.common.services.datamodel.backend.server.cache.ModuleDataModelOracleBuilderProvider$InnerBuilder.build(ModuleDataModelOracleBuilderProvider.java:92)
    at org.kie.workbench.common.services.datamodel.backend.server.cache.LRUModuleDataModelOracleCache.makeModuleOracle(LRUModuleDataModelOracleCache.java:81)
    at org.kie.workbench.common.services.datamodel.backend.server.cache.LRUModuleDataModelOracleCache.assertModuleDataModelOracle(LRUModuleDataModelOracleCache.java:72)
    at org.kie.workbench.common.services.datamodel.backend.server.cache.LRUModuleDataModelOracleCache$Proxy$_$$_WeldClientProxy.assertModuleDataModelOracle(Unknown Source)
    at org.kie.workbench.common.services.datamodel.backend.server.cache.LRUDataModelOracleCache.makePackageDataModelOracle(LRUDataModelOracleCache.java:162)
    at org.kie.workbench.common.services.datamodel.backend.server.cache.LRUDataModelOracleCache.assertPackageDataModelOracle(LRUDataModelOracleCache.java:149)
    at org.kie.workbench.common.services.datamodel.backend.server.cache.LRUDataModelOracleCache$Proxy$_$$_WeldClientProxy.assertPackageDataModelOracle(Unknown Source)
    at org.kie.workbench.common.services.datamodel.backend.server.DataModelServiceImpl.getDataModel(DataModelServiceImpl.java:70)
    ... 87 more

2020-07-17 10:05:23,744 WARN  [org.jboss.modules.define] (default task-14) Failed to define class META-INF.versions.9.module-info in Module "deployment.decision-central.war" from Service Module Loader: java.lang.UnsupportedClassVersionError: Failed to link META-INF/versions/9/module-info (Module "deployment.decision-central.war" from Service Module Loader): META-INF/versions/9/module-info has been compiled by a more recent version of the Java Runtime (class file version 53.0), this version of the Java Runtime only recognizes class file versions up to 52.0