Hi community,

I'm trying to configure the GeoFence and GeoFence Internal Server plugins for 
GeoServer 2.18.0.
The first problem is that I get a NullPointerException if I try to press the  
Test Connection button on the GeoFence Admin Page (image below).  Moreover,  
GeoFence Data and Admin rules pages won't open from the web UI and give an 
error: org.apache.wicket.WicketRuntimeException: Can't instantiate page using 
constructor 'public org.geoserver.geofence.web.GeofenceServerPage()'. An 
exception has been thrown during construction! However,  I think that's related 
to the first problem. Please correct me, if
I'm wrong.

GeoServer 2.18.0 is running on Ubuntu 18.04.5 LTS with JVM Version (Ubuntu: 
11.0.8 (OpenJDK 64-Bit Server VM).
I have installed the latest GeoFence and GeoFence Internal server plugins from 
(https://sourceforge.net/projects/geoserver/files/GeoServer/2.18.0/extensions/)
With GeoServer 2.17.3 everything was functioning as expected without any errors.

Any help with this would be appreciated.

BR,
Eetu Jutila

[cid:image001.png@01D6AC61.C192D900]

Stack trace:

2020-10-27 10:35:27,005 WARN [geoserver.web] -
java.lang.NullPointerException
              at 
org.hibernate.impl.SessionFactoryImpl.getClassMetadata(SessionFactoryImpl.java:807)
              at 
com.googlecode.genericdao.search.hibernate.HibernateMetadataUtil.get(HibernateMetadataUtil.java:92)
              at 
com.googlecode.genericdao.search.BaseSearchProcessor.generateFromClause(BaseSearchProcessor.java:342)
              at 
com.googlecode.genericdao.search.BaseSearchProcessor.generateQL(BaseSearchProcessor.java:116)
              at 
com.googlecode.genericdao.search.jpa.JPASearchProcessor.search(JPASearchProcessor.java:76)
              at 
com.googlecode.genericdao.dao.jpa.JPABaseDAO._search(JPABaseDAO.java:322)
              at 
com.googlecode.genericdao.dao.jpa.GenericDAOImpl.search(GenericDAOImpl.java:123)
              at 
org.geoserver.geofence.core.dao.impl.PrioritizableDAOImpl.search(PrioritizableDAOImpl.java:180)
              at 
org.geoserver.geofence.core.dao.impl.RuleDAOImpl.search(RuleDAOImpl.java:106)
              at jdk.internal.reflect.GeneratedMethodAccessor372.invoke(Unknown 
Source)
              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.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:343)
              at 
org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:198)
              at 
org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163)
              at 
org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:295)
              at 
org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:98)
              at 
org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
              at 
org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:212)
              at com.sun.proxy.$Proxy44.search(Unknown Source)
              at 
org.geoserver.geofence.services.RuleReaderServiceImpl.getRuleAux(RuleReaderServiceImpl.java:608)
              at 
org.geoserver.geofence.services.RuleReaderServiceImpl.getRules(RuleReaderServiceImpl.java:487)
              at 
org.geoserver.geofence.services.RuleReaderServiceImpl.getMatchingRules(RuleReaderServiceImpl.java:84)
              at 
org.geoserver.geofence.web.GeofencePage$1.onSubmit(GeofencePage.java:96)
              at 
org.apache.wicket.ajax.markup.html.form.AjaxSubmitLink$1.onSubmit(AjaxSubmitLink.java:111)
              at 
org.apache.wicket.ajax.form.AjaxFormSubmitBehavior$AjaxFormSubmitter.onSubmit(AjaxFormSubmitBehavior.java:215)
              at 
org.apache.wicket.markup.html.form.Form.onFormSubmitted(Form.java:787)
              at 
org.apache.wicket.ajax.form.AjaxFormSubmitBehavior.onEvent(AjaxFormSubmitBehavior.java:171)
              at 
org.apache.wicket.ajax.AjaxEventBehavior.respond(AjaxEventBehavior.java:155)
              at 
org.apache.wicket.ajax.AbstractDefaultAjaxBehavior.onRequest(AbstractDefaultAjaxBehavior.java:601)
              at jdk.internal.reflect.GeneratedMethodAccessor412.invoke(Unknown 
Source)
              at 
java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
              at java.base/java.lang.reflect.Method.invoke(Method.java:566)
              at 
org.apache.wicket.RequestListenerInterface.internalInvoke(RequestListenerInterface.java:258)
              at 
org.apache.wicket.RequestListenerInterface.invoke(RequestListenerInterface.java:241)
              at 
org.apache.wicket.core.request.handler.ListenerInterfaceRequestHandler.invokeListener(ListenerInterfaceRequestHandler.java:248)
              at 
org.apache.wicket.core.request.handler.ListenerInterfaceRequestHandler.respond(ListenerInterfaceRequestHandler.java:234)
              at 
org.apache.wicket.request.cycle.RequestCycle$HandlerExecutor.respond(RequestCycle.java:895)
              at 
org.apache.wicket.request.RequestHandlerStack.execute(RequestHandlerStack.java:64)
              at 
org.apache.wicket.request.cycle.RequestCycle.execute(RequestCycle.java:265)
              at 
org.apache.wicket.request.cycle.RequestCycle.processRequest(RequestCycle.java:222)
              at 
org.apache.wicket.request.cycle.RequestCycle.processRequestAndDetach(RequestCycle.java:293)
              at 
org.apache.wicket.protocol.http.WicketFilter.processRequestCycle(WicketFilter.java:261)
              at 
org.apache.wicket.protocol.http.WicketFilter.processRequest(WicketFilter.java:203)
              at 
org.apache.wicket.protocol.http.WicketServlet.doPost(WicketServlet.java:159)
              at javax.servlet.http.HttpServlet.service(HttpServlet.java:652)
              at javax.servlet.http.HttpServlet.service(HttpServlet.java:733)
              at 
org.springframework.web.servlet.mvc.ServletWrappingController.handleRequestInternal(ServletWrappingController.java:166)
              at 
org.springframework.web.servlet.mvc.AbstractController.handleRequest(AbstractController.java:177)
              at 
org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:52)
              at 
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1040)
              at 
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:943)
              at 
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006)
              at 
org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:909)
              at javax.servlet.http.HttpServlet.service(HttpServlet.java:652)
              at 
org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883)
              at javax.servlet.http.HttpServlet.service(HttpServlet.java:733)
              at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
              at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
              at 
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
              at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
              at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
              at 
org.geoserver.filters.ThreadLocalsCleanupFilter.doFilter(ThreadLocalsCleanupFilter.java:26)
              at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
              at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
              at 
org.geoserver.filters.SpringDelegatingFilter$Chain.doFilter(SpringDelegatingFilter.java:69)
              at 
org.geoserver.wms.animate.AnimatorFilter.doFilter(AnimatorFilter.java:70)
              at 
org.geoserver.filters.SpringDelegatingFilter$Chain.doFilter(SpringDelegatingFilter.java:66)
              at 
org.geoserver.monitor.MonitorFilter.doFilter(MonitorFilter.java:88)
              at 
org.geoserver.filters.SpringDelegatingFilter$Chain.doFilter(SpringDelegatingFilter.java:66)
              at 
org.geoserver.filters.SpringDelegatingFilter.doFilter(SpringDelegatingFilter.java:41)
              at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
              at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
              at 
org.geoserver.platform.AdvancedDispatchFilter.doFilter(AdvancedDispatchFilter.java:37)
              at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
              at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
              at 
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:320)
              at 
org.geoserver.security.filter.GeoServerCompositeFilter$NestedFilterChain.doFilter(GeoServerCompositeFilter.java:70)
              at 
org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:127)
              at 
org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:91)
              at 
org.geoserver.security.filter.GeoServerCompositeFilter$NestedFilterChain.doFilter(GeoServerCompositeFilter.java:74)
              at 
org.geoserver.security.filter.GeoServerCompositeFilter.doFilter(GeoServerCompositeFilter.java:91)
              at 
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
              at 
org.geoserver.security.filter.GeoServerCompositeFilter$NestedFilterChain.doFilter(GeoServerCompositeFilter.java:70)
              at 
org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:119)
              at 
org.geoserver.security.filter.GeoServerCompositeFilter$NestedFilterChain.doFilter(GeoServerCompositeFilter.java:74)
              at 
org.geoserver.security.filter.GeoServerCompositeFilter.doFilter(GeoServerCompositeFilter.java:91)
              at 
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
              at 
org.geoserver.security.filter.GeoServerAnonymousAuthenticationFilter.doFilter(GeoServerAnonymousAuthenticationFilter.java:51)
              at 
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
              at 
org.geoserver.security.filter.GeoServerCompositeFilter$NestedFilterChain.doFilter(GeoServerCompositeFilter.java:70)
              at 
org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:200)
              at 
org.geoserver.security.filter.GeoServerCompositeFilter$NestedFilterChain.doFilter(GeoServerCompositeFilter.java:74)
              at 
org.geoserver.security.filter.GeoServerCompositeFilter.doFilter(GeoServerCompositeFilter.java:91)
              at 
org.geoserver.security.filter.GeoServerUserNamePasswordAuthenticationFilter.doFilter(GeoServerUserNamePasswordAuthenticationFilter.java:122)
              at 
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
              at 
org.geoserver.security.filter.GeoServerCompositeFilter$NestedFilterChain.doFilter(GeoServerCompositeFilter.java:70)
              at 
org.springframework.security.web.authentication.rememberme.RememberMeAuthenticationFilter.doFilter(RememberMeAuthenticationFilter.java:158)
              at 
org.geoserver.security.filter.GeoServerCompositeFilter$NestedFilterChain.doFilter(GeoServerCompositeFilter.java:74)
              at 
org.geoserver.security.filter.GeoServerCompositeFilter.doFilter(GeoServerCompositeFilter.java:91)
              at 
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
              at 
org.geoserver.security.filter.GeoServerCompositeFilter$NestedFilterChain.doFilter(GeoServerCompositeFilter.java:70)
              at 
org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:105)
              at 
org.geoserver.security.filter.GeoServerSecurityContextPersistenceFilter$1.doFilter(GeoServerSecurityContextPersistenceFilter.java:52)
              at 
org.geoserver.security.filter.GeoServerCompositeFilter$NestedFilterChain.doFilter(GeoServerCompositeFilter.java:74)
              at 
org.geoserver.security.filter.GeoServerCompositeFilter.doFilter(GeoServerCompositeFilter.java:91)
              at 
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
              at 
org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:215)
              at 
org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:178)
              at 
org.geoserver.security.GeoServerSecurityFilterChainProxy.doFilter(GeoServerSecurityFilterChainProxy.java:142)
              at 
org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:358)
              at 
org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:271)
              at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
              at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
              at 
org.geoserver.filters.LoggingFilter.doFilter(LoggingFilter.java:101)
              at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
              at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
              at 
org.geoserver.filters.XFrameOptionsFilter.doFilter(XFrameOptionsFilter.java:77)
              at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
              at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
              at org.geoserver.filters.GZIPFilter.doFilter(GZIPFilter.java:47)
              at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
              at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
              at 
org.geoserver.filters.SessionDebugFilter.doFilter(SessionDebugFilter.java:46)
              at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
              at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
              at 
org.geoserver.filters.FlushSafeFilter.doFilter(FlushSafeFilter.java:42)
              at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
              at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
              at 
org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201)
              at 
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)
              at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
              at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
              at 
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202)
              at 
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97)
              at 
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:541)
              at 
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:143)
              at 
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
              at 
org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:690)
              at 
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78)
              at 
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
              at 
org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:374)
              at 
org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)
              at 
org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:868)
              at 
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1590)
              at 
org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
              at 
java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
              at 
java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
              at 
org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
              at java.base/java.lang.Thread.run(Thread.java:834)

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