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Failed to add pluggable layer configuration panels
java.lang.NullPointerException: 	at java.util.ArrayList.(ArrayList.java:151)	at org.geoserver.web.wicket.LiveCollectionModel$1.getObject(LiveCollectionModel.java:49)	at org.geoserver.wms.web.publish.AuthorityURLListEditor.(AuthorityURLListEditor.java:57)	at org.geoserver.wms.web.publish.LayerAuthoritiesAndIdentifiersPanel.(LayerAuthoritiesAndIdentifiersPanel.java:29)	at org.geoserver.wms.web.publish.WMSLayerConfig.(WMSLayerConfig.java:103)	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)	at java.lang.reflect.Constructor.newInstance(Constructor.java:525)	at org.geoserver.web.data.resource.ResourceConfigurationPage$PublishingLayerEditTabPanel$1.populateItem(ResourceConfigurationPage.java:374)	at org.apache.wicket.markup.html.list.ListView.onPopulate(ListView.java:562)	at org.apache.wicket.markup.repeater.AbstractRepeater.onBeforeRender(AbstractRepeater.java:131)	at org.apache.wicket.Component.internalBeforeRender(Component.java:1071)	at org.apache.wicket.Component.beforeRender(Component.java:1105)	at org.apache.wicket.MarkupContainer.onBeforeRenderChildren(MarkupContainer.java:1753)	at org.apache.wicket.Component.onBeforeRender(Component.java:3946)	at org.apache.wicket.Component.internalBeforeRender(Component.java:1071)	at org.apache.wicket.Component.beforeRender(Component.java:1105)	at org.apache.wicket.MarkupContainer.onBeforeRenderChildren(MarkupContainer.java:1753)	at org.apache.wicket.Component.onBeforeRender(Component.java:3946)	at org.apache.wicket.extensions.markup.html.tabs.TabbedPanel.onBeforeRender(TabbedPanel.java:244)	at org.apache.wicket.Component.internalBeforeRender(Component.java:1071)	at org.apache.wicket.Component.beforeRender(Component.java:1105)	at org.apache.wicket.MarkupContainer.onBeforeRenderChildren(MarkupContainer.java:1753)	at org.apache.wicket.Component.onBeforeRender(Component.java:3946)	at org.apache.wicket.markup.html.form.Form.onBeforeRender(Form.java:2056)	at org.apache.wicket.Component.internalBeforeRender(Component.java:1071)	at org.apache.wicket.Component.beforeRender(Component.java:1105)	at org.apache.wicket.MarkupContainer.onBeforeRenderChildren(MarkupContainer.java:1753)	at org.apache.wicket.Component.onBeforeRender(Component.java:3946)	at org.apache.wicket.Page.onBeforeRender(Page.java:1531)	at org.apache.wicket.Component.internalBeforeRender(Component.java:1071)	at org.apache.wicket.Component.beforeRender(Component.java:1105)	at org.apache.wicket.Component.prepareForRender(Component.java:2292)	at org.apache.wicket.Page.prepareForRender(Page.java:1521)	at org.apache.wicket.Component.prepareForRender(Component.java:2329)	at org.apache.wicket.Page.renderPage(Page.java:892)	at org.apache.wicket.protocol.http.WebRequestCycle.redirectTo(WebRequestCycle.java:186)	at org.apache.wicket.request.target.component.PageRequestTarget.respond(PageRequestTarget.java:58)	at org.apache.wicket.request.AbstractRequestCycleProcessor.respond(AbstractRequestCycleProcessor.java:105)	at org.apache.wicket.RequestCycle.processEventsAndRespond(RequestCycle.java:1258)	at org.apache.wicket.RequestCycle.step(RequestCycle.java:1329)	at org.apache.wicket.RequestCycle.steps(RequestCycle.java:1436)	at org.apache.wicket.RequestCycle.request(RequestCycle.java:545)	at org.apache.wicket.protocol.http.WicketFilter.doGet(WicketFilter.java:484)	at org.apache.wicket.protocol.http.WicketServlet.doPost(WicketServlet.java:160)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:641)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)	at org.springframework.web.servlet.mvc.ServletWrappingController.handleRequestInternal(ServletWrappingController.java:158)	at org.springframework.web.servlet.mvc.AbstractController.handleRequest(AbstractController.java:153)	at org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:48)	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:875)	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:809)	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:571)	at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:511)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:641)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)	at org.geoserver.filters.ThreadLocalsCleanupFilter.doFilter(ThreadLocalsCleanupFilter.java:23)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)	at org.geoserver.filters.SpringDelegatingFilter$Chain.doFilter(SpringDelegatingFilter.java:74)	at org.geoserver.filters.SpringDelegatingFilter.doFilter(SpringDelegatingFilter.java:45)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)	at org.geoserver.platform.AdvancedDispatchFilter.doFilter(AdvancedDispatchFilter.java:49)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)	at org.vfny.geoserver.filters.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:109)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)	at org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:394)	at org.springframework.security.intercept.web.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:109)	at org.springframework.security.intercept.web.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:83)	at org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:406)	at org.springframework.security.ui.ExceptionTranslationFilter.doFilterHttp(ExceptionTranslationFilter.java:101)	at org.springframework.security.ui.SpringSecurityFilter.doFilter(SpringSecurityFilter.java:53)	at org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:406)	at org.springframework.security.providers.anonymous.AnonymousProcessingFilter.doFilterHttp(AnonymousProcessingFilter.java:105)	at org.springframework.security.ui.SpringSecurityFilter.doFilter(SpringSecurityFilter.java:53)	at org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:406)	at org.springframework.security.ui.rememberme.RememberMeProcessingFilter.doFilterHttp(RememberMeProcessingFilter.java:116)	at org.springframework.security.ui.SpringSecurityFilter.doFilter(SpringSecurityFilter.java:53)	at org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:406)	at org.springframework.security.wrapper.SecurityContextHolderAwareRequestFilter.doFilterHttp(SecurityContextHolderAwareRequestFilter.java:91)	at org.springframework.security.ui.SpringSecurityFilter.doFilter(SpringSecurityFilter.java:53)	at org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:406)	at org.springframework.security.ui.AbstractProcessingFilter.doFilterHttp(AbstractProcessingFilter.java:278)	at org.springframework.security.ui.SpringSecurityFilter.doFilter(SpringSecurityFilter.java:53)	at org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:406)	at org.springframework.security.ui.logout.LogoutFilter.doFilterHttp(LogoutFilter.java:89)	at org.springframework.security.ui.SpringSecurityFilter.doFilter(SpringSecurityFilter.java:53)	at org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:406)	at org.springframework.security.context.HttpSessionContextIntegrationFilter.doFilterHttp(HttpSessionContextIntegrationFilter.java:235)	at org.springframework.security.ui.SpringSecurityFilter.doFilter(SpringSecurityFilter.java:53)	at org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:406)	at org.springframework.security.util.FilterChainProxy.doFilter(FilterChainProxy.java:185)	at org.springframework.security.util.FilterToBeanProxy.doFilter(FilterToBeanProxy.java:99)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)	at org.geoserver.filters.LoggingFilter.doFilter(LoggingFilter.java:71)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)	at org.geoserver.filters.ReverseProxyFilter.doFilter(ReverseProxyFilter.java:183)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)	at org.geoserver.filters.GZIPFilter.doFilter(GZIPFilter.java:41)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)	at org.geoserver.filters.SessionDebugFilter.doFilter(SessionDebugFilter.java:46)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:224)	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:169)	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)	at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:927)	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)	at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:987)	at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:579)	at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:1805)	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)	at java.lang.Thread.run(Thread.java:722)