App-Schema - namespace error with include despite all being declared

joey-geoloog · July 28, 2026, 4:37pm

Hi there,

I’m having a sticky time with feature chaining using the app schema. I’ve stepped through the mapping one by one and fixed a number of errors, but I think I’m missing something. I now get an error about an undeclared namespace, but the namespaces are correctly declared in both the main mapping file (er-v_FossilFuelResource.xml) and the include (er-v_FossilFuelResourceType.xml).

I’ve checked against the tutorial and it all seems to match that as well.

I would be very grateful for any insight on this! Thank you so much.

er-v_FossilFuelResource.xml (12.0 KB)

er-v_FossilFuelResourceType.xml (3.4 KB)

GeoServer 2.28.0 (upgrade to 3.0.0 on the cards!)

Stack trace

28 Jul 18:28:23 ERROR  [geoserver.ows] - 
org.geoserver.platform.ServiceException: Failed to run GetFeatureInfo on layer FossilFuelResource
	at org.geoserver.wms.GetFeatureInfo.execute(GetFeatureInfo.java:103)
	at org.geoserver.wms.GetFeatureInfo.run(GetFeatureInfo.java:48)
	at org.geoserver.wms.DefaultWebMapService.getFeatureInfo(DefaultWebMapService.java:261)
	at jdk.internal.reflect.GeneratedMethodAccessor505.invoke(Unknown Source)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:569)
	at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:344)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:198)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163)
	at org.geoserver.kml.WebMapServiceKmlInterceptor.invoke(WebMapServiceKmlInterceptor.java:38)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
	at org.geoserver.ows.util.RequestObjectLogger.invoke(RequestObjectLogger.java:51)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
	at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:241)
	at jdk.proxy3/jdk.proxy3.$Proxy77.getFeatureInfo(Unknown Source)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:569)
	at org.geoserver.ows.Dispatcher.execute(Dispatcher.java:950)
	at org.geoserver.ows.Dispatcher.handleRequestInternal(Dispatcher.java:271)
	at org.springframework.web.servlet.mvc.AbstractController.handleRequest(AbstractController.java:177)
	at org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:51)
	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1072)
	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:965)
	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006)
	at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:529)
	at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:623)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:199)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:144)
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:168)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:144)
	at org.geoserver.filters.ThreadLocalsCleanupFilter.doFilter(ThreadLocalsCleanupFilter.java:28)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:168)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:144)
	at org.geoserver.filters.SpringDelegatingFilter$Chain.doFilter(SpringDelegatingFilter.java:70)
	at org.geoserver.ogcapi.LandingPageSlashFilter.doFilter(LandingPageSlashFilter.java:53)
	at org.geoserver.filters.SpringDelegatingFilter$Chain.doFilter(SpringDelegatingFilter.java:67)
	at org.geoserver.flow.controller.IpBlacklistFilter.doFilter(IpBlacklistFilter.java:87)
	at org.geoserver.filters.SpringDelegatingFilter$Chain.doFilter(SpringDelegatingFilter.java:67)
	at org.geoserver.flow.ControlFlowCallback.doFilter(ControlFlowCallback.java:266)
	at org.geoserver.filters.SpringDelegatingFilter$Chain.doFilter(SpringDelegatingFilter.java:67)
	at org.geoserver.ows.HTTPHeadersCollector.doFilter(HTTPHeadersCollector.java:48)
	at org.geoserver.filters.SpringDelegatingFilter$Chain.doFilter(SpringDelegatingFilter.java:67)
	at org.geoserver.filters.HTTPMethodFilter.doFilter(HTTPMethodFilter.java:34)
	at org.geoserver.filters.SpringDelegatingFilter$Chain.doFilter(SpringDelegatingFilter.java:67)
	at org.geoserver.filters.LoggingFilter.doFilter(LoggingFilter.java:176)
	at org.geoserver.filters.SpringDelegatingFilter$Chain.doFilter(SpringDelegatingFilter.java:67)
	at org.geoserver.filters.SpringDelegatingFilter.doFilter(SpringDelegatingFilter.java:41)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:168)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:144)
	at org.geoserver.platform.AdvancedDispatchFilter.doFilter(AdvancedDispatchFilter.java:39)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:168)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:144)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:352)
	at org.geoserver.security.filter.GeoServerCompositeFilter$NestedFilterChain.doFilter(GeoServerCompositeFilter.java:67)
	at org.springframework.security.web.access.intercept.AuthorizationFilter.doFilter(AuthorizationFilter.java:100)
	at org.geoserver.security.filter.GeoServerCompositeFilter$NestedFilterChain.doFilter(GeoServerCompositeFilter.java:71)
	at org.geoserver.security.filter.GeoServerCompositeFilter.doFilter(GeoServerCompositeFilter.java:88)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:361)
	at org.geoserver.security.filter.GeoServerCompositeFilter$NestedFilterChain.doFilter(GeoServerCompositeFilter.java:67)
	at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:126)
	at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:120)
	at org.geoserver.security.filter.GeoServerCompositeFilter$NestedFilterChain.doFilter(GeoServerCompositeFilter.java:71)
	at org.geoserver.security.filter.GeoServerCompositeFilter.doFilter(GeoServerCompositeFilter.java:88)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:361)
	at org.geoserver.security.filter.GeoServerAnonymousAuthenticationFilter.doFilter(GeoServerAnonymousAuthenticationFilter.java:52)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:361)
	at org.geoserver.security.filter.GeoServerCompositeFilter$NestedFilterChain.doFilter(GeoServerCompositeFilter.java:67)
	at org.springframework.security.web.authentication.www.DigestAuthenticationFilter.doFilter(DigestAuthenticationFilter.java:133)
	at org.springframework.security.web.authentication.www.DigestAuthenticationFilter.doFilter(DigestAuthenticationFilter.java:126)
	at org.geoserver.security.filter.GeoServerCompositeFilter$NestedFilterChain.doFilter(GeoServerCompositeFilter.java:71)
	at org.geoserver.security.filter.GeoServerCompositeFilter.doFilter(GeoServerCompositeFilter.java:88)
	at org.geoserver.security.filter.GeoServerDigestAuthenticationFilter.doFilter(GeoServerDigestAuthenticationFilter.java:80)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:361)
	at org.geoserver.security.filter.GeoServerCompositeFilter$NestedFilterChain.doFilter(GeoServerCompositeFilter.java:67)
	at org.springframework.security.web.authentication.www.BasicAuthenticationFilter.doFilterInternal(BasicAuthenticationFilter.java:168)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117)
	at org.geoserver.security.filter.GeoServerCompositeFilter$NestedFilterChain.doFilter(GeoServerCompositeFilter.java:71)
	at org.geoserver.security.filter.GeoServerCompositeFilter.doFilter(GeoServerCompositeFilter.java:88)
	at org.geoserver.security.filter.GeoServerBasicAuthenticationFilter.doFilter(GeoServerBasicAuthenticationFilter.java:80)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:361)
	at org.geoserver.security.filter.GeoServerCompositeFilter$NestedFilterChain.doFilter(GeoServerCompositeFilter.java:67)
	at org.geoserver.security.filter.GeoServerSecurityContextPersistenceFilter$1.doFilterInternal(GeoServerSecurityContextPersistenceFilter.java:66)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117)
	at org.geoserver.security.filter.GeoServerCompositeFilter$NestedFilterChain.doFilter(GeoServerCompositeFilter.java:71)
	at org.geoserver.security.filter.GeoServerCompositeFilter.doFilter(GeoServerCompositeFilter.java:88)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:361)
	at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:225)
	at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:190)
	at org.geoserver.security.GeoServerSecurityFilterChainProxy.doFilter(GeoServerSecurityFilterChainProxy.java:139)
	at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:354)
	at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:267)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:168)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:144)
	at org.geoserver.filters.SecurityHeadersFilter.doFilter(SecurityHeadersFilter.java:116)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:168)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:144)
	at org.geoserver.filters.GZIPFilter.doFilter(GZIPFilter.java:46)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:168)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:144)
	at org.geoserver.filters.SessionDebugFilter.doFilter(SessionDebugFilter.java:47)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:168)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:144)
	at org.geoserver.filters.FlushSafeFilter.doFilter(FlushSafeFilter.java:41)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:168)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:144)
	at org.apache.catalina.filters.CorsFilter.handleNonCORS(CorsFilter.java:333)
	at org.apache.catalina.filters.CorsFilter.doFilter(CorsFilter.java:160)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:168)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:144)
	at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:168)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:144)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:168)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:90)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:482)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:130)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:93)
	at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:656)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:346)
	at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:397)
	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:63)
	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:935)
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1826)
	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:52)
	at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1189)
	at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:658)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:63)
	at java.base/java.lang.Thread.run(Thread.java:840)
Caused by: java.lang.RuntimeException: java.lang.RuntimeException: Error applying mapping with targetAttribute er-v:resource
	at org.geotools.data.complex.AbstractMappingFeatureIterator.next(AbstractMappingFeatureIterator.java:394)
	at org.geoserver.wms.featureinfo.FeatureCollectionDecorator.size(FeatureCollectionDecorator.java:121)
	at org.geoserver.wms.GetFeatureInfo.addToResults(GetFeatureInfo.java:139)
	at org.geoserver.wms.GetFeatureInfo.execute(GetFeatureInfo.java:93)
	... 134 more
Caused by: java.lang.RuntimeException: Error applying mapping with targetAttribute er-v:resource
	at org.geotools.data.complex.DataAccessMappingFeatureIterator.computeNext(DataAccessMappingFeatureIterator.java:1357)
	at org.geotools.data.complex.AbstractMappingFeatureIterator.next(AbstractMappingFeatureIterator.java:391)
	... 137 more
Caused by: java.lang.IllegalArgumentException: No namespace set: The namespace has not been declared in the app-schema mapping file for name: (er-v:FossilFuelResourceType) [Check the Namespaces section in the config file] 
	at org.geotools.feature.type.Types.degloseName(Types.java:543)
	at org.geotools.data.complex.NestedAttributeMapping.getNestedFeatureType(NestedAttributeMapping.java:433)
	at org.geotools.data.complex.DataAccessMappingFeatureIterator.setAttributeValue(DataAccessMappingFeatureIterator.java:570)
	at org.geotools.data.complex.DataAccessMappingFeatureIterator.computeNext(DataAccessMappingFeatureIterator.java:1313)
	... 138 more

joey-geoloog · July 30, 2026, 1:47pm

Have carried on trying to find my own way with this, in case that helps anyone who’s reading this;

- the mapping files are themselves fine, if I make separate layers out of them without feature chaining, they work exactly as intended.

it is only when feature chaining is setup that this error occurs. Doesn’t matter whether the chaining uses FEATURE_LINK or just the key field.
the source database doesn’t have primary or foreign keys, I’ll try to see if this is where the issue is, but as the mapping was via FEATURE_LINK I wouldn’t expect it to be an issue.
I can see old posts along a similar but different line, but that isn’t the problem here: [Geoserver-users] app-schema: unknown namespace - GeoServer / GeoServer User - OSGeo Discourse. I have checked that the namespaces are correctly defined and valid, they are good as far as I can see and the error is different.
There are no other workspaces with that namespace, but making it an isolated workspace still doesn’t fix the issue.

Will continue to post here as more becomes apparent, but again am very grateful for any and all insight into where this might be going wrong, as the error message doesn’t really help.

joey-geoloog · July 31, 2026, 10:35am

Looking into this deeper seems that whichever way around I use the FEATURE_LINK tool, it seems to try and evaluate a namespace around it.

31 Jul 11:18:47 DEBUG  [complex.util] - Using root's namespace http://inspire.ec.europa.eu/schemas/er-v/4.0 for step named 'FIELD_GML_ID', as no prefix was stated

Fixed this by using the mappingName attribute and works as expected