500!

Das ist ein Fehler.

Es tauchte ein Fehler im Server auf, der verhinderte, dass die Anfrage nach "/rc" erfüllt werden konnte.

java.io.IOException: javax.xml.transform.TransformerException: Exception resolving period:areacode=0&date=31.03.2017&fq=true
	at org.mycore.common.content.transformer.MCRXSLTransformer.transform(MCRXSLTransformer.java:243)
	at org.mycore.common.xml.MCRLayoutService.transform(MCRLayoutService.java:201)
	at org.mycore.common.xml.MCRLayoutService.doLayout(MCRLayoutService.java:94)
	at de.urmel_dl.dbt.rc.servlets.SlotListServlet.doGetPost(SlotListServlet.java:268)
	at org.mycore.frontend.servlets.MCRServlet.doGet(MCRServlet.java:184)
	at org.mycore.frontend.servlets.MCRServlet.render(MCRServlet.java:502)
	at org.mycore.frontend.servlets.MCRServlet.processRenderingPhase(MCRServlet.java:467)
	at org.mycore.frontend.servlets.MCRServlet.doGetPost(MCRServlet.java:318)
	at org.mycore.frontend.servlets.MCRServlet.doGet(MCRServlet.java:156)
	at jakarta.servlet.http.HttpServlet.service(HttpServlet.java:564)
	at jakarta.servlet.http.HttpServlet.service(HttpServlet.java:658)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:205)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149)
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149)
	at org.mycore.frontend.filter.MCRWebAppBaseFilter.doFilter(MCRWebAppBaseFilter.java:41)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149)
	at org.mycore.frontend.filter.MCRRequestAuthenticationFilter.doFilter(MCRRequestAuthenticationFilter.java:57)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149)
	at org.mycore.frontend.filter.MCRRequestDebugFilter.doFilter(MCRRequestDebugFilter.java:75)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149)
	at org.apache.logging.log4j.web.Log4jServletFilter.doFilter(Log4jServletFilter.java:71)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:167)
	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:115)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:93)
	at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:673)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:340)
	at org.apache.coyote.ajp.AjpProcessor.service(AjpProcessor.java:431)
	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:63)
	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:896)
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1744)
	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:52)
	at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191)
	at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.base/java.lang.Thread.run(Thread.java:840)
Caused by: javax.xml.transform.TransformerException: Exception resolving period:areacode=0&date=31.03.2017&fq=true
	at de.urmel_dl.dbt.rc.resolver.PeriodResolver.resolve(PeriodResolver.java:99)
	at org.mycore.common.xml.MCRURIResolver.resolve(MCRURIResolver.java:343)
	at org.apache.xpath.SourceTreeManager.resolveURI(SourceTreeManager.java:127)
	at org.apache.xalan.templates.FuncDocument.getDoc(FuncDocument.java:237)
	at org.apache.xalan.templates.FuncDocument.execute(FuncDocument.java:194)
	at org.apache.xpath.XPath.execute(XPath.java:337)
	at org.apache.xalan.templates.ElemVariable.getValue(ElemVariable.java:280)
	at org.apache.xalan.templates.ElemVariable.execute(ElemVariable.java:248)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.java:1376)
	at org.apache.xalan.templates.ElemApplyTemplates.transformSelectedNodes(ElemApplyTemplates.java:395)
	at org.apache.xalan.templates.ElemApplyTemplates.execute(ElemApplyTemplates.java:178)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.transformer.TransformerImpl.transformToRTF(TransformerImpl.java:1990)
	at org.apache.xalan.transformer.TransformerImpl.transformToRTF(TransformerImpl.java:1912)
	at org.apache.xalan.templates.ElemVariable.getValue(ElemVariable.java:312)
	at org.apache.xalan.templates.ElemVariable.execute(ElemVariable.java:248)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.templates.ElemIf.execute(ElemIf.java:162)
	at org.apache.xalan.templates.ElemForEach.transformSelectedNodes(ElemForEach.java:425)
	at org.apache.xalan.templates.ElemForEach.execute(ElemForEach.java:265)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.java:1376)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.templates.ElemTemplate.execute(ElemTemplate.java:394)
	at org.apache.xalan.templates.ElemCallTemplate.execute(ElemCallTemplate.java:248)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.templates.ElemChoose.execute(ElemChoose.java:141)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.java:1376)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.java:1376)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.java:1376)
	at org.apache.xalan.templates.ElemApplyTemplates.transformSelectedNodes(ElemApplyTemplates.java:395)
	at org.apache.xalan.templates.ElemApplyTemplates.execute(ElemApplyTemplates.java:178)
	at org.apache.xalan.templates.ElemApplyTemplates.transformSelectedNodes(ElemApplyTemplates.java:395)
	at org.apache.xalan.templates.ElemApplyTemplates.execute(ElemApplyTemplates.java:178)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.java:1376)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.transformer.TransformerImpl.applyTemplateToNode(TransformerImpl.java:2272)
	at org.apache.xalan.transformer.TransformerImpl.transformNode(TransformerImpl.java:1358)
	at org.apache.xalan.transformer.TransformerImpl.run(TransformerImpl.java:3449)
	at org.apache.xalan.transformer.TransformerHandlerImpl.endDocument(TransformerHandlerImpl.java:408)
	at java.xml/com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.endDocument(AbstractSAXParser.java:754)
	at java.xml/com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:547)
	at java.xml/com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:889)
	at java.xml/com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:825)
	at java.xml/com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:141)
	at java.xml/com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1224)
	at java.xml/com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:637)
	at org.mycore.common.content.transformer.MCRXSLTransformer.transform(MCRXSLTransformer.java:235)
	... 44 more
Caused by: java.lang.RuntimeException: Couldn't marshal class de.urmel_dl.dbt.rc.datamodel.Period to output class org.jdom2.transform.JDOMResult.
	at de.urmel_dl.dbt.utils.EntityFactory.lambda$new$1(EntityFactory.java:139)
	at de.urmel_dl.dbt.utils.EntityFactory.toDocument(EntityFactory.java:341)
	at de.urmel_dl.dbt.rc.resolver.PeriodResolver.resolve(PeriodResolver.java:93)
	... 96 more
Caused by: java.lang.reflect.InvocationTargetException
	at jdk.internal.reflect.GeneratedMethodAccessor202.invoke(Unknown Source)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:568)
	at de.urmel_dl.dbt.utils.EntityFactory.lambda$new$1(EntityFactory.java:137)
	... 98 more
Caused by: jakarta.xml.bind.MarshalException
 - with linked exception:
[Exception [EclipseLink-99] (Eclipse Persistence Services - 3.0.3.v202208191135): org.eclipse.persistence.exceptions.DescriptorException
Exception Description: The method [getAt] on the object [de.urmel_dl.dbt.rc.datamodel.Warning] triggered an exception.
Internal Exception: java.lang.reflect.InvocationTargetException
Target Invocation Exception: java.lang.NullPointerException
Mapping: org.eclipse.persistence.oxm.mappings.XMLDirectMapping[at-->@at]
Descriptor: XMLDescriptor(de.urmel_dl.dbt.rc.datamodel.Warning --> [DatabaseTable(warning)])]
	at org.eclipse.persistence.jaxb.JAXBMarshaller.marshal(JAXBMarshaller.java:550)
	... 102 more
Caused by: Exception [EclipseLink-99] (Eclipse Persistence Services - 3.0.3.v202208191135): org.eclipse.persistence.exceptions.DescriptorException
Exception Description: The method [getAt] on the object [de.urmel_dl.dbt.rc.datamodel.Warning] triggered an exception.
Internal Exception: java.lang.reflect.InvocationTargetException
Target Invocation Exception: java.lang.NullPointerException
Mapping: org.eclipse.persistence.oxm.mappings.XMLDirectMapping[at-->@at]
Descriptor: XMLDescriptor(de.urmel_dl.dbt.rc.datamodel.Warning --> [DatabaseTable(warning)])
	at org.eclipse.persistence.exceptions.DescriptorException.targetInvocationWhileGettingValueThruMethodAccessor(DescriptorException.java:1701)
	at org.eclipse.persistence.internal.descriptors.MethodAttributeAccessor.lambda$getAttributeValueFromObject$1(MethodAttributeAccessor.java:81)
	at org.eclipse.persistence.internal.security.PrivilegedAccessHelper.callDoPrivilegedWithException(PrivilegedAccessHelper.java:259)
	at org.eclipse.persistence.internal.descriptors.MethodAttributeAccessor.getAttributeValueFromObject(MethodAttributeAccessor.java:72)
	at org.eclipse.persistence.internal.descriptors.MethodAttributeAccessor.getAttributeValueFromObject(MethodAttributeAccessor.java:65)
	at org.eclipse.persistence.mappings.DatabaseMapping.getAttributeValueFromObject(DatabaseMapping.java:691)
	at org.eclipse.persistence.internal.oxm.record.ObjectMarshalContext.getAttributeValue(ObjectMarshalContext.java:57)
	at org.eclipse.persistence.internal.oxm.XMLDirectMappingNodeValue.marshal(XMLDirectMappingNodeValue.java:70)
	at org.eclipse.persistence.internal.oxm.NodeValue.marshal(NodeValue.java:104)
	at org.eclipse.persistence.internal.oxm.record.ObjectMarshalContext.marshal(ObjectMarshalContext.java:67)
	at org.eclipse.persistence.internal.oxm.XPathNode.marshal(XPathNode.java:451)
	at org.eclipse.persistence.internal.oxm.XPathObjectBuilder.marshalAttributes(XPathObjectBuilder.java:569)
	at org.eclipse.persistence.internal.oxm.TreeObjectBuilder.marshalAttributes(TreeObjectBuilder.java:132)
	at org.eclipse.persistence.internal.oxm.XPathNode.startElement(XPathNode.java:477)
	at org.eclipse.persistence.internal.oxm.XMLCompositeCollectionMappingNodeValue.marshalSingleValue(XMLCompositeCollectionMappingNodeValue.java:336)
	at org.eclipse.persistence.internal.oxm.XMLCompositeCollectionMappingNodeValue.marshal(XMLCompositeCollectionMappingNodeValue.java:104)
	at org.eclipse.persistence.internal.oxm.NodeValue.marshal(NodeValue.java:151)
	at org.eclipse.persistence.internal.oxm.NodeValue.marshal(NodeValue.java:104)
	at org.eclipse.persistence.internal.oxm.record.ObjectMarshalContext.marshal(ObjectMarshalContext.java:67)
	at org.eclipse.persistence.internal.oxm.XPathNode.marshal(XPathNode.java:451)
	at org.eclipse.persistence.internal.oxm.XPathNode.marshal(XPathNode.java:432)
	at org.eclipse.persistence.internal.oxm.XPathObjectBuilder.buildRow(XPathObjectBuilder.java:247)
	at org.eclipse.persistence.internal.oxm.TreeObjectBuilder.buildRow(TreeObjectBuilder.java:127)
	at org.eclipse.persistence.internal.oxm.TreeObjectBuilder.buildRow(TreeObjectBuilder.java:50)
	at org.eclipse.persistence.internal.oxm.XMLMarshaller.marshal(XMLMarshaller.java:786)
	at org.eclipse.persistence.internal.oxm.XMLMarshaller.marshal(XMLMarshaller.java:559)
	at org.eclipse.persistence.internal.oxm.XMLMarshaller.marshal(XMLMarshaller.java:512)
	at org.eclipse.persistence.internal.oxm.XMLMarshaller.marshal(XMLMarshaller.java:1030)
	at org.eclipse.persistence.oxm.XMLMarshaller.marshal(XMLMarshaller.java:200)
	at org.eclipse.persistence.jaxb.JAXBMarshaller.marshal(JAXBMarshaller.java:546)
	... 102 more
Caused by: java.lang.reflect.InvocationTargetException
	at jdk.internal.reflect.GeneratedMethodAccessor197.invoke(Unknown Source)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:568)
	at org.eclipse.persistence.internal.descriptors.MethodAttributeAccessor.lambda$getAttributeValueFromObject$0(MethodAttributeAccessor.java:74)
	at org.eclipse.persistence.internal.security.PrivilegedAccessHelper.callDoPrivilegedWithException(PrivilegedAccessHelper.java:190)
	at org.eclipse.persistence.internal.security.PrivilegedAccessHelper.callDoPrivilegedWithException(PrivilegedAccessHelper.java:257)
	... 129 more
Caused by: java.lang.NullPointerException

javax.xml.transform.TransformerException: Exception resolving period:areacode=0&date=31.03.2017&fq=true
	at de.urmel_dl.dbt.rc.resolver.PeriodResolver.resolve(PeriodResolver.java:99)
	at org.mycore.common.xml.MCRURIResolver.resolve(MCRURIResolver.java:343)
	at org.apache.xpath.SourceTreeManager.resolveURI(SourceTreeManager.java:127)
	at org.apache.xalan.templates.FuncDocument.getDoc(FuncDocument.java:237)
	at org.apache.xalan.templates.FuncDocument.execute(FuncDocument.java:194)
	at org.apache.xpath.XPath.execute(XPath.java:337)
	at org.apache.xalan.templates.ElemVariable.getValue(ElemVariable.java:280)
	at org.apache.xalan.templates.ElemVariable.execute(ElemVariable.java:248)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.java:1376)
	at org.apache.xalan.templates.ElemApplyTemplates.transformSelectedNodes(ElemApplyTemplates.java:395)
	at org.apache.xalan.templates.ElemApplyTemplates.execute(ElemApplyTemplates.java:178)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.transformer.TransformerImpl.transformToRTF(TransformerImpl.java:1990)
	at org.apache.xalan.transformer.TransformerImpl.transformToRTF(TransformerImpl.java:1912)
	at org.apache.xalan.templates.ElemVariable.getValue(ElemVariable.java:312)
	at org.apache.xalan.templates.ElemVariable.execute(ElemVariable.java:248)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.templates.ElemIf.execute(ElemIf.java:162)
	at org.apache.xalan.templates.ElemForEach.transformSelectedNodes(ElemForEach.java:425)
	at org.apache.xalan.templates.ElemForEach.execute(ElemForEach.java:265)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.java:1376)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.templates.ElemTemplate.execute(ElemTemplate.java:394)
	at org.apache.xalan.templates.ElemCallTemplate.execute(ElemCallTemplate.java:248)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.templates.ElemChoose.execute(ElemChoose.java:141)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.java:1376)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.java:1376)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.java:1376)
	at org.apache.xalan.templates.ElemApplyTemplates.transformSelectedNodes(ElemApplyTemplates.java:395)
	at org.apache.xalan.templates.ElemApplyTemplates.execute(ElemApplyTemplates.java:178)
	at org.apache.xalan.templates.ElemApplyTemplates.transformSelectedNodes(ElemApplyTemplates.java:395)
	at org.apache.xalan.templates.ElemApplyTemplates.execute(ElemApplyTemplates.java:178)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.java:1376)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.transformer.TransformerImpl.applyTemplateToNode(TransformerImpl.java:2272)
	at org.apache.xalan.transformer.TransformerImpl.transformNode(TransformerImpl.java:1358)
	at org.apache.xalan.transformer.TransformerImpl.run(TransformerImpl.java:3449)
	at org.apache.xalan.transformer.TransformerHandlerImpl.endDocument(TransformerHandlerImpl.java:408)
	at java.xml/com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.endDocument(AbstractSAXParser.java:754)
	at java.xml/com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:547)
	at java.xml/com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:889)
	at java.xml/com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:825)
	at java.xml/com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:141)
	at java.xml/com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1224)
	at java.xml/com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:637)
	at org.mycore.common.content.transformer.MCRXSLTransformer.transform(MCRXSLTransformer.java:235)
	at org.mycore.common.xml.MCRLayoutService.transform(MCRLayoutService.java:201)
	at org.mycore.common.xml.MCRLayoutService.doLayout(MCRLayoutService.java:94)
	at de.urmel_dl.dbt.rc.servlets.SlotListServlet.doGetPost(SlotListServlet.java:268)
	at org.mycore.frontend.servlets.MCRServlet.doGet(MCRServlet.java:184)
	at org.mycore.frontend.servlets.MCRServlet.render(MCRServlet.java:502)
	at org.mycore.frontend.servlets.MCRServlet.processRenderingPhase(MCRServlet.java:467)
	at org.mycore.frontend.servlets.MCRServlet.doGetPost(MCRServlet.java:318)
	at org.mycore.frontend.servlets.MCRServlet.doGet(MCRServlet.java:156)
	at jakarta.servlet.http.HttpServlet.service(HttpServlet.java:564)
	at jakarta.servlet.http.HttpServlet.service(HttpServlet.java:658)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:205)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149)
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149)
	at org.mycore.frontend.filter.MCRWebAppBaseFilter.doFilter(MCRWebAppBaseFilter.java:41)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149)
	at org.mycore.frontend.filter.MCRRequestAuthenticationFilter.doFilter(MCRRequestAuthenticationFilter.java:57)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149)
	at org.mycore.frontend.filter.MCRRequestDebugFilter.doFilter(MCRRequestDebugFilter.java:75)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149)
	at org.apache.logging.log4j.web.Log4jServletFilter.doFilter(Log4jServletFilter.java:71)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:167)
	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:115)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:93)
	at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:673)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:340)
	at org.apache.coyote.ajp.AjpProcessor.service(AjpProcessor.java:431)
	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:63)
	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:896)
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1744)
	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:52)
	at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191)
	at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.base/java.lang.Thread.run(Thread.java:840)
Caused by: java.lang.RuntimeException: Couldn't marshal class de.urmel_dl.dbt.rc.datamodel.Period to output class org.jdom2.transform.JDOMResult.
	at de.urmel_dl.dbt.utils.EntityFactory.lambda$new$1(EntityFactory.java:139)
	at de.urmel_dl.dbt.utils.EntityFactory.toDocument(EntityFactory.java:341)
	at de.urmel_dl.dbt.rc.resolver.PeriodResolver.resolve(PeriodResolver.java:93)
	... 96 more
Caused by: java.lang.reflect.InvocationTargetException
	at jdk.internal.reflect.GeneratedMethodAccessor202.invoke(Unknown Source)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:568)
	at de.urmel_dl.dbt.utils.EntityFactory.lambda$new$1(EntityFactory.java:137)
	... 98 more
Caused by: jakarta.xml.bind.MarshalException
 - with linked exception:
[Exception [EclipseLink-99] (Eclipse Persistence Services - 3.0.3.v202208191135): org.eclipse.persistence.exceptions.DescriptorException
Exception Description: The method [getAt] on the object [de.urmel_dl.dbt.rc.datamodel.Warning] triggered an exception.
Internal Exception: java.lang.reflect.InvocationTargetException
Target Invocation Exception: java.lang.NullPointerException
Mapping: org.eclipse.persistence.oxm.mappings.XMLDirectMapping[at-->@at]
Descriptor: XMLDescriptor(de.urmel_dl.dbt.rc.datamodel.Warning --> [DatabaseTable(warning)])]
	at org.eclipse.persistence.jaxb.JAXBMarshaller.marshal(JAXBMarshaller.java:550)
	... 102 more
Caused by: Exception [EclipseLink-99] (Eclipse Persistence Services - 3.0.3.v202208191135): org.eclipse.persistence.exceptions.DescriptorException
Exception Description: The method [getAt] on the object [de.urmel_dl.dbt.rc.datamodel.Warning] triggered an exception.
Internal Exception: java.lang.reflect.InvocationTargetException
Target Invocation Exception: java.lang.NullPointerException
Mapping: org.eclipse.persistence.oxm.mappings.XMLDirectMapping[at-->@at]
Descriptor: XMLDescriptor(de.urmel_dl.dbt.rc.datamodel.Warning --> [DatabaseTable(warning)])
	at org.eclipse.persistence.exceptions.DescriptorException.targetInvocationWhileGettingValueThruMethodAccessor(DescriptorException.java:1701)
	at org.eclipse.persistence.internal.descriptors.MethodAttributeAccessor.lambda$getAttributeValueFromObject$1(MethodAttributeAccessor.java:81)
	at org.eclipse.persistence.internal.security.PrivilegedAccessHelper.callDoPrivilegedWithException(PrivilegedAccessHelper.java:259)
	at org.eclipse.persistence.internal.descriptors.MethodAttributeAccessor.getAttributeValueFromObject(MethodAttributeAccessor.java:72)
	at org.eclipse.persistence.internal.descriptors.MethodAttributeAccessor.getAttributeValueFromObject(MethodAttributeAccessor.java:65)
	at org.eclipse.persistence.mappings.DatabaseMapping.getAttributeValueFromObject(DatabaseMapping.java:691)
	at org.eclipse.persistence.internal.oxm.record.ObjectMarshalContext.getAttributeValue(ObjectMarshalContext.java:57)
	at org.eclipse.persistence.internal.oxm.XMLDirectMappingNodeValue.marshal(XMLDirectMappingNodeValue.java:70)
	at org.eclipse.persistence.internal.oxm.NodeValue.marshal(NodeValue.java:104)
	at org.eclipse.persistence.internal.oxm.record.ObjectMarshalContext.marshal(ObjectMarshalContext.java:67)
	at org.eclipse.persistence.internal.oxm.XPathNode.marshal(XPathNode.java:451)
	at org.eclipse.persistence.internal.oxm.XPathObjectBuilder.marshalAttributes(XPathObjectBuilder.java:569)
	at org.eclipse.persistence.internal.oxm.TreeObjectBuilder.marshalAttributes(TreeObjectBuilder.java:132)
	at org.eclipse.persistence.internal.oxm.XPathNode.startElement(XPathNode.java:477)
	at org.eclipse.persistence.internal.oxm.XMLCompositeCollectionMappingNodeValue.marshalSingleValue(XMLCompositeCollectionMappingNodeValue.java:336)
	at org.eclipse.persistence.internal.oxm.XMLCompositeCollectionMappingNodeValue.marshal(XMLCompositeCollectionMappingNodeValue.java:104)
	at org.eclipse.persistence.internal.oxm.NodeValue.marshal(NodeValue.java:151)
	at org.eclipse.persistence.internal.oxm.NodeValue.marshal(NodeValue.java:104)
	at org.eclipse.persistence.internal.oxm.record.ObjectMarshalContext.marshal(ObjectMarshalContext.java:67)
	at org.eclipse.persistence.internal.oxm.XPathNode.marshal(XPathNode.java:451)
	at org.eclipse.persistence.internal.oxm.XPathNode.marshal(XPathNode.java:432)
	at org.eclipse.persistence.internal.oxm.XPathObjectBuilder.buildRow(XPathObjectBuilder.java:247)
	at org.eclipse.persistence.internal.oxm.TreeObjectBuilder.buildRow(TreeObjectBuilder.java:127)
	at org.eclipse.persistence.internal.oxm.TreeObjectBuilder.buildRow(TreeObjectBuilder.java:50)
	at org.eclipse.persistence.internal.oxm.XMLMarshaller.marshal(XMLMarshaller.java:786)
	at org.eclipse.persistence.internal.oxm.XMLMarshaller.marshal(XMLMarshaller.java:559)
	at org.eclipse.persistence.internal.oxm.XMLMarshaller.marshal(XMLMarshaller.java:512)
	at org.eclipse.persistence.internal.oxm.XMLMarshaller.marshal(XMLMarshaller.java:1030)
	at org.eclipse.persistence.oxm.XMLMarshaller.marshal(XMLMarshaller.java:200)
	at org.eclipse.persistence.jaxb.JAXBMarshaller.marshal(JAXBMarshaller.java:546)
	... 102 more
Caused by: java.lang.reflect.InvocationTargetException
	at jdk.internal.reflect.GeneratedMethodAccessor197.invoke(Unknown Source)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:568)
	at org.eclipse.persistence.internal.descriptors.MethodAttributeAccessor.lambda$getAttributeValueFromObject$0(MethodAttributeAccessor.java:74)
	at org.eclipse.persistence.internal.security.PrivilegedAccessHelper.callDoPrivilegedWithException(PrivilegedAccessHelper.java:190)
	at org.eclipse.persistence.internal.security.PrivilegedAccessHelper.callDoPrivilegedWithException(PrivilegedAccessHelper.java:257)
	... 129 more
Caused by: java.lang.NullPointerException
---------
java.lang.RuntimeException: Couldn't marshal class de.urmel_dl.dbt.rc.datamodel.Period to output class org.jdom2.transform.JDOMResult.
	at de.urmel_dl.dbt.utils.EntityFactory.lambda$new$1(EntityFactory.java:139)
	at de.urmel_dl.dbt.utils.EntityFactory.toDocument(EntityFactory.java:341)
	at de.urmel_dl.dbt.rc.resolver.PeriodResolver.resolve(PeriodResolver.java:93)
	at org.mycore.common.xml.MCRURIResolver.resolve(MCRURIResolver.java:343)
	at org.apache.xpath.SourceTreeManager.resolveURI(SourceTreeManager.java:127)
	at org.apache.xalan.templates.FuncDocument.getDoc(FuncDocument.java:237)
	at org.apache.xalan.templates.FuncDocument.execute(FuncDocument.java:194)
	at org.apache.xpath.XPath.execute(XPath.java:337)
	at org.apache.xalan.templates.ElemVariable.getValue(ElemVariable.java:280)
	at org.apache.xalan.templates.ElemVariable.execute(ElemVariable.java:248)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.java:1376)
	at org.apache.xalan.templates.ElemApplyTemplates.transformSelectedNodes(ElemApplyTemplates.java:395)
	at org.apache.xalan.templates.ElemApplyTemplates.execute(ElemApplyTemplates.java:178)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.transformer.TransformerImpl.transformToRTF(TransformerImpl.java:1990)
	at org.apache.xalan.transformer.TransformerImpl.transformToRTF(TransformerImpl.java:1912)
	at org.apache.xalan.templates.ElemVariable.getValue(ElemVariable.java:312)
	at org.apache.xalan.templates.ElemVariable.execute(ElemVariable.java:248)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.templates.ElemIf.execute(ElemIf.java:162)
	at org.apache.xalan.templates.ElemForEach.transformSelectedNodes(ElemForEach.java:425)
	at org.apache.xalan.templates.ElemForEach.execute(ElemForEach.java:265)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.java:1376)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.templates.ElemTemplate.execute(ElemTemplate.java:394)
	at org.apache.xalan.templates.ElemCallTemplate.execute(ElemCallTemplate.java:248)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.templates.ElemChoose.execute(ElemChoose.java:141)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.java:1376)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.java:1376)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.java:1376)
	at org.apache.xalan.templates.ElemApplyTemplates.transformSelectedNodes(ElemApplyTemplates.java:395)
	at org.apache.xalan.templates.ElemApplyTemplates.execute(ElemApplyTemplates.java:178)
	at org.apache.xalan.templates.ElemApplyTemplates.transformSelectedNodes(ElemApplyTemplates.java:395)
	at org.apache.xalan.templates.ElemApplyTemplates.execute(ElemApplyTemplates.java:178)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.java:1376)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.transformer.TransformerImpl.applyTemplateToNode(TransformerImpl.java:2272)
	at org.apache.xalan.transformer.TransformerImpl.transformNode(TransformerImpl.java:1358)
	at org.apache.xalan.transformer.TransformerImpl.run(TransformerImpl.java:3449)
	at org.apache.xalan.transformer.TransformerHandlerImpl.endDocument(TransformerHandlerImpl.java:408)
	at java.xml/com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.endDocument(AbstractSAXParser.java:754)
	at java.xml/com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:547)
	at java.xml/com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:889)
	at java.xml/com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:825)
	at java.xml/com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:141)
	at java.xml/com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1224)
	at java.xml/com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:637)
	at org.mycore.common.content.transformer.MCRXSLTransformer.transform(MCRXSLTransformer.java:235)
	at org.mycore.common.xml.MCRLayoutService.transform(MCRLayoutService.java:201)
	at org.mycore.common.xml.MCRLayoutService.doLayout(MCRLayoutService.java:94)
	at de.urmel_dl.dbt.rc.servlets.SlotListServlet.doGetPost(SlotListServlet.java:268)
	at org.mycore.frontend.servlets.MCRServlet.doGet(MCRServlet.java:184)
	at org.mycore.frontend.servlets.MCRServlet.render(MCRServlet.java:502)
	at org.mycore.frontend.servlets.MCRServlet.processRenderingPhase(MCRServlet.java:467)
	at org.mycore.frontend.servlets.MCRServlet.doGetPost(MCRServlet.java:318)
	at org.mycore.frontend.servlets.MCRServlet.doGet(MCRServlet.java:156)
	at jakarta.servlet.http.HttpServlet.service(HttpServlet.java:564)
	at jakarta.servlet.http.HttpServlet.service(HttpServlet.java:658)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:205)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149)
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149)
	at org.mycore.frontend.filter.MCRWebAppBaseFilter.doFilter(MCRWebAppBaseFilter.java:41)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149)
	at org.mycore.frontend.filter.MCRRequestAuthenticationFilter.doFilter(MCRRequestAuthenticationFilter.java:57)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149)
	at org.mycore.frontend.filter.MCRRequestDebugFilter.doFilter(MCRRequestDebugFilter.java:75)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149)
	at org.apache.logging.log4j.web.Log4jServletFilter.doFilter(Log4jServletFilter.java:71)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:167)
	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:115)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:93)
	at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:673)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:340)
	at org.apache.coyote.ajp.AjpProcessor.service(AjpProcessor.java:431)
	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:63)
	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:896)
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1744)
	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:52)
	at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191)
	at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.base/java.lang.Thread.run(Thread.java:840)
Caused by: java.lang.reflect.InvocationTargetException
	at jdk.internal.reflect.GeneratedMethodAccessor202.invoke(Unknown Source)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:568)
	at de.urmel_dl.dbt.utils.EntityFactory.lambda$new$1(EntityFactory.java:137)
	... 98 more
Caused by: jakarta.xml.bind.MarshalException
 - with linked exception:
[Exception [EclipseLink-99] (Eclipse Persistence Services - 3.0.3.v202208191135): org.eclipse.persistence.exceptions.DescriptorException
Exception Description: The method [getAt] on the object [de.urmel_dl.dbt.rc.datamodel.Warning] triggered an exception.
Internal Exception: java.lang.reflect.InvocationTargetException
Target Invocation Exception: java.lang.NullPointerException
Mapping: org.eclipse.persistence.oxm.mappings.XMLDirectMapping[at-->@at]
Descriptor: XMLDescriptor(de.urmel_dl.dbt.rc.datamodel.Warning --> [DatabaseTable(warning)])]
	at org.eclipse.persistence.jaxb.JAXBMarshaller.marshal(JAXBMarshaller.java:550)
	... 102 more
Caused by: Exception [EclipseLink-99] (Eclipse Persistence Services - 3.0.3.v202208191135): org.eclipse.persistence.exceptions.DescriptorException
Exception Description: The method [getAt] on the object [de.urmel_dl.dbt.rc.datamodel.Warning] triggered an exception.
Internal Exception: java.lang.reflect.InvocationTargetException
Target Invocation Exception: java.lang.NullPointerException
Mapping: org.eclipse.persistence.oxm.mappings.XMLDirectMapping[at-->@at]
Descriptor: XMLDescriptor(de.urmel_dl.dbt.rc.datamodel.Warning --> [DatabaseTable(warning)])
	at org.eclipse.persistence.exceptions.DescriptorException.targetInvocationWhileGettingValueThruMethodAccessor(DescriptorException.java:1701)
	at org.eclipse.persistence.internal.descriptors.MethodAttributeAccessor.lambda$getAttributeValueFromObject$1(MethodAttributeAccessor.java:81)
	at org.eclipse.persistence.internal.security.PrivilegedAccessHelper.callDoPrivilegedWithException(PrivilegedAccessHelper.java:259)
	at org.eclipse.persistence.internal.descriptors.MethodAttributeAccessor.getAttributeValueFromObject(MethodAttributeAccessor.java:72)
	at org.eclipse.persistence.internal.descriptors.MethodAttributeAccessor.getAttributeValueFromObject(MethodAttributeAccessor.java:65)
	at org.eclipse.persistence.mappings.DatabaseMapping.getAttributeValueFromObject(DatabaseMapping.java:691)
	at org.eclipse.persistence.internal.oxm.record.ObjectMarshalContext.getAttributeValue(ObjectMarshalContext.java:57)
	at org.eclipse.persistence.internal.oxm.XMLDirectMappingNodeValue.marshal(XMLDirectMappingNodeValue.java:70)
	at org.eclipse.persistence.internal.oxm.NodeValue.marshal(NodeValue.java:104)
	at org.eclipse.persistence.internal.oxm.record.ObjectMarshalContext.marshal(ObjectMarshalContext.java:67)
	at org.eclipse.persistence.internal.oxm.XPathNode.marshal(XPathNode.java:451)
	at org.eclipse.persistence.internal.oxm.XPathObjectBuilder.marshalAttributes(XPathObjectBuilder.java:569)
	at org.eclipse.persistence.internal.oxm.TreeObjectBuilder.marshalAttributes(TreeObjectBuilder.java:132)
	at org.eclipse.persistence.internal.oxm.XPathNode.startElement(XPathNode.java:477)
	at org.eclipse.persistence.internal.oxm.XMLCompositeCollectionMappingNodeValue.marshalSingleValue(XMLCompositeCollectionMappingNodeValue.java:336)
	at org.eclipse.persistence.internal.oxm.XMLCompositeCollectionMappingNodeValue.marshal(XMLCompositeCollectionMappingNodeValue.java:104)
	at org.eclipse.persistence.internal.oxm.NodeValue.marshal(NodeValue.java:151)
	at org.eclipse.persistence.internal.oxm.NodeValue.marshal(NodeValue.java:104)
	at org.eclipse.persistence.internal.oxm.record.ObjectMarshalContext.marshal(ObjectMarshalContext.java:67)
	at org.eclipse.persistence.internal.oxm.XPathNode.marshal(XPathNode.java:451)
	at org.eclipse.persistence.internal.oxm.XPathNode.marshal(XPathNode.java:432)
	at org.eclipse.persistence.internal.oxm.XPathObjectBuilder.buildRow(XPathObjectBuilder.java:247)
	at org.eclipse.persistence.internal.oxm.TreeObjectBuilder.buildRow(TreeObjectBuilder.java:127)
	at org.eclipse.persistence.internal.oxm.TreeObjectBuilder.buildRow(TreeObjectBuilder.java:50)
	at org.eclipse.persistence.internal.oxm.XMLMarshaller.marshal(XMLMarshaller.java:786)
	at org.eclipse.persistence.internal.oxm.XMLMarshaller.marshal(XMLMarshaller.java:559)
	at org.eclipse.persistence.internal.oxm.XMLMarshaller.marshal(XMLMarshaller.java:512)
	at org.eclipse.persistence.internal.oxm.XMLMarshaller.marshal(XMLMarshaller.java:1030)
	at org.eclipse.persistence.oxm.XMLMarshaller.marshal(XMLMarshaller.java:200)
	at org.eclipse.persistence.jaxb.JAXBMarshaller.marshal(JAXBMarshaller.java:546)
	... 102 more
Caused by: java.lang.reflect.InvocationTargetException
	at jdk.internal.reflect.GeneratedMethodAccessor197.invoke(Unknown Source)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:568)
	at org.eclipse.persistence.internal.descriptors.MethodAttributeAccessor.lambda$getAttributeValueFromObject$0(MethodAttributeAccessor.java:74)
	at org.eclipse.persistence.internal.security.PrivilegedAccessHelper.callDoPrivilegedWithException(PrivilegedAccessHelper.java:190)
	at org.eclipse.persistence.internal.security.PrivilegedAccessHelper.callDoPrivilegedWithException(PrivilegedAccessHelper.java:257)
	... 129 more
Caused by: java.lang.NullPointerException

java.lang.RuntimeException: Couldn't marshal class de.urmel_dl.dbt.rc.datamodel.Period to output class org.jdom2.transform.JDOMResult.
	at de.urmel_dl.dbt.utils.EntityFactory.lambda$new$1(EntityFactory.java:139)
	at de.urmel_dl.dbt.utils.EntityFactory.toDocument(EntityFactory.java:341)
	at de.urmel_dl.dbt.rc.resolver.PeriodResolver.resolve(PeriodResolver.java:93)
	at org.mycore.common.xml.MCRURIResolver.resolve(MCRURIResolver.java:343)
	at org.apache.xpath.SourceTreeManager.resolveURI(SourceTreeManager.java:127)
	at org.apache.xalan.templates.FuncDocument.getDoc(FuncDocument.java:237)
	at org.apache.xalan.templates.FuncDocument.execute(FuncDocument.java:194)
	at org.apache.xpath.XPath.execute(XPath.java:337)
	at org.apache.xalan.templates.ElemVariable.getValue(ElemVariable.java:280)
	at org.apache.xalan.templates.ElemVariable.execute(ElemVariable.java:248)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.java:1376)
	at org.apache.xalan.templates.ElemApplyTemplates.transformSelectedNodes(ElemApplyTemplates.java:395)
	at org.apache.xalan.templates.ElemApplyTemplates.execute(ElemApplyTemplates.java:178)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.transformer.TransformerImpl.transformToRTF(TransformerImpl.java:1990)
	at org.apache.xalan.transformer.TransformerImpl.transformToRTF(TransformerImpl.java:1912)
	at org.apache.xalan.templates.ElemVariable.getValue(ElemVariable.java:312)
	at org.apache.xalan.templates.ElemVariable.execute(ElemVariable.java:248)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.templates.ElemIf.execute(ElemIf.java:162)
	at org.apache.xalan.templates.ElemForEach.transformSelectedNodes(ElemForEach.java:425)
	at org.apache.xalan.templates.ElemForEach.execute(ElemForEach.java:265)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.java:1376)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.templates.ElemTemplate.execute(ElemTemplate.java:394)
	at org.apache.xalan.templates.ElemCallTemplate.execute(ElemCallTemplate.java:248)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.templates.ElemChoose.execute(ElemChoose.java:141)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.java:1376)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.java:1376)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.java:1376)
	at org.apache.xalan.templates.ElemApplyTemplates.transformSelectedNodes(ElemApplyTemplates.java:395)
	at org.apache.xalan.templates.ElemApplyTemplates.execute(ElemApplyTemplates.java:178)
	at org.apache.xalan.templates.ElemApplyTemplates.transformSelectedNodes(ElemApplyTemplates.java:395)
	at org.apache.xalan.templates.ElemApplyTemplates.execute(ElemApplyTemplates.java:178)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.java:1376)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.transformer.TransformerImpl.applyTemplateToNode(TransformerImpl.java:2272)
	at org.apache.xalan.transformer.TransformerImpl.transformNode(TransformerImpl.java:1358)
	at org.apache.xalan.transformer.TransformerImpl.run(TransformerImpl.java:3449)
	at org.apache.xalan.transformer.TransformerHandlerImpl.endDocument(TransformerHandlerImpl.java:408)
	at java.xml/com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.endDocument(AbstractSAXParser.java:754)
	at java.xml/com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:547)
	at java.xml/com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:889)
	at java.xml/com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:825)
	at java.xml/com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:141)
	at java.xml/com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1224)
	at java.xml/com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:637)
	at org.mycore.common.content.transformer.MCRXSLTransformer.transform(MCRXSLTransformer.java:235)
	at org.mycore.common.xml.MCRLayoutService.transform(MCRLayoutService.java:201)
	at org.mycore.common.xml.MCRLayoutService.doLayout(MCRLayoutService.java:94)
	at de.urmel_dl.dbt.rc.servlets.SlotListServlet.doGetPost(SlotListServlet.java:268)
	at org.mycore.frontend.servlets.MCRServlet.doGet(MCRServlet.java:184)
	at org.mycore.frontend.servlets.MCRServlet.render(MCRServlet.java:502)
	at org.mycore.frontend.servlets.MCRServlet.processRenderingPhase(MCRServlet.java:467)
	at org.mycore.frontend.servlets.MCRServlet.doGetPost(MCRServlet.java:318)
	at org.mycore.frontend.servlets.MCRServlet.doGet(MCRServlet.java:156)
	at jakarta.servlet.http.HttpServlet.service(HttpServlet.java:564)
	at jakarta.servlet.http.HttpServlet.service(HttpServlet.java:658)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:205)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149)
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149)
	at org.mycore.frontend.filter.MCRWebAppBaseFilter.doFilter(MCRWebAppBaseFilter.java:41)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149)
	at org.mycore.frontend.filter.MCRRequestAuthenticationFilter.doFilter(MCRRequestAuthenticationFilter.java:57)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149)
	at org.mycore.frontend.filter.MCRRequestDebugFilter.doFilter(MCRRequestDebugFilter.java:75)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149)
	at org.apache.logging.log4j.web.Log4jServletFilter.doFilter(Log4jServletFilter.java:71)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:167)
	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:115)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:93)
	at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:673)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:340)
	at org.apache.coyote.ajp.AjpProcessor.service(AjpProcessor.java:431)
	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:63)
	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:896)
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1744)
	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:52)
	at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191)
	at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.base/java.lang.Thread.run(Thread.java:840)
Caused by: java.lang.reflect.InvocationTargetException
	at jdk.internal.reflect.GeneratedMethodAccessor202.invoke(Unknown Source)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:568)
	at de.urmel_dl.dbt.utils.EntityFactory.lambda$new$1(EntityFactory.java:137)
	... 98 more
Caused by: jakarta.xml.bind.MarshalException
 - with linked exception:
[Exception [EclipseLink-99] (Eclipse Persistence Services - 3.0.3.v202208191135): org.eclipse.persistence.exceptions.DescriptorException
Exception Description: The method [getAt] on the object [de.urmel_dl.dbt.rc.datamodel.Warning] triggered an exception.
Internal Exception: java.lang.reflect.InvocationTargetException
Target Invocation Exception: java.lang.NullPointerException
Mapping: org.eclipse.persistence.oxm.mappings.XMLDirectMapping[at-->@at]
Descriptor: XMLDescriptor(de.urmel_dl.dbt.rc.datamodel.Warning --> [DatabaseTable(warning)])]
	at org.eclipse.persistence.jaxb.JAXBMarshaller.marshal(JAXBMarshaller.java:550)
	... 102 more
Caused by: Exception [EclipseLink-99] (Eclipse Persistence Services - 3.0.3.v202208191135): org.eclipse.persistence.exceptions.DescriptorException
Exception Description: The method [getAt] on the object [de.urmel_dl.dbt.rc.datamodel.Warning] triggered an exception.
Internal Exception: java.lang.reflect.InvocationTargetException
Target Invocation Exception: java.lang.NullPointerException
Mapping: org.eclipse.persistence.oxm.mappings.XMLDirectMapping[at-->@at]
Descriptor: XMLDescriptor(de.urmel_dl.dbt.rc.datamodel.Warning --> [DatabaseTable(warning)])
	at org.eclipse.persistence.exceptions.DescriptorException.targetInvocationWhileGettingValueThruMethodAccessor(DescriptorException.java:1701)
	at org.eclipse.persistence.internal.descriptors.MethodAttributeAccessor.lambda$getAttributeValueFromObject$1(MethodAttributeAccessor.java:81)
	at org.eclipse.persistence.internal.security.PrivilegedAccessHelper.callDoPrivilegedWithException(PrivilegedAccessHelper.java:259)
	at org.eclipse.persistence.internal.descriptors.MethodAttributeAccessor.getAttributeValueFromObject(MethodAttributeAccessor.java:72)
	at org.eclipse.persistence.internal.descriptors.MethodAttributeAccessor.getAttributeValueFromObject(MethodAttributeAccessor.java:65)
	at org.eclipse.persistence.mappings.DatabaseMapping.getAttributeValueFromObject(DatabaseMapping.java:691)
	at org.eclipse.persistence.internal.oxm.record.ObjectMarshalContext.getAttributeValue(ObjectMarshalContext.java:57)
	at org.eclipse.persistence.internal.oxm.XMLDirectMappingNodeValue.marshal(XMLDirectMappingNodeValue.java:70)
	at org.eclipse.persistence.internal.oxm.NodeValue.marshal(NodeValue.java:104)
	at org.eclipse.persistence.internal.oxm.record.ObjectMarshalContext.marshal(ObjectMarshalContext.java:67)
	at org.eclipse.persistence.internal.oxm.XPathNode.marshal(XPathNode.java:451)
	at org.eclipse.persistence.internal.oxm.XPathObjectBuilder.marshalAttributes(XPathObjectBuilder.java:569)
	at org.eclipse.persistence.internal.oxm.TreeObjectBuilder.marshalAttributes(TreeObjectBuilder.java:132)
	at org.eclipse.persistence.internal.oxm.XPathNode.startElement(XPathNode.java:477)
	at org.eclipse.persistence.internal.oxm.XMLCompositeCollectionMappingNodeValue.marshalSingleValue(XMLCompositeCollectionMappingNodeValue.java:336)
	at org.eclipse.persistence.internal.oxm.XMLCompositeCollectionMappingNodeValue.marshal(XMLCompositeCollectionMappingNodeValue.java:104)
	at org.eclipse.persistence.internal.oxm.NodeValue.marshal(NodeValue.java:151)
	at org.eclipse.persistence.internal.oxm.NodeValue.marshal(NodeValue.java:104)
	at org.eclipse.persistence.internal.oxm.record.ObjectMarshalContext.marshal(ObjectMarshalContext.java:67)
	at org.eclipse.persistence.internal.oxm.XPathNode.marshal(XPathNode.java:451)
	at org.eclipse.persistence.internal.oxm.XPathNode.marshal(XPathNode.java:432)
	at org.eclipse.persistence.internal.oxm.XPathObjectBuilder.buildRow(XPathObjectBuilder.java:247)
	at org.eclipse.persistence.internal.oxm.TreeObjectBuilder.buildRow(TreeObjectBuilder.java:127)
	at org.eclipse.persistence.internal.oxm.TreeObjectBuilder.buildRow(TreeObjectBuilder.java:50)
	at org.eclipse.persistence.internal.oxm.XMLMarshaller.marshal(XMLMarshaller.java:786)
	at org.eclipse.persistence.internal.oxm.XMLMarshaller.marshal(XMLMarshaller.java:559)
	at org.eclipse.persistence.internal.oxm.XMLMarshaller.marshal(XMLMarshaller.java:512)
	at org.eclipse.persistence.internal.oxm.XMLMarshaller.marshal(XMLMarshaller.java:1030)
	at org.eclipse.persistence.oxm.XMLMarshaller.marshal(XMLMarshaller.java:200)
	at org.eclipse.persistence.jaxb.JAXBMarshaller.marshal(JAXBMarshaller.java:546)
	... 102 more
Caused by: java.lang.reflect.InvocationTargetException
	at jdk.internal.reflect.GeneratedMethodAccessor197.invoke(Unknown Source)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:568)
	at org.eclipse.persistence.internal.descriptors.MethodAttributeAccessor.lambda$getAttributeValueFromObject$0(MethodAttributeAccessor.java:74)
	at org.eclipse.persistence.internal.security.PrivilegedAccessHelper.callDoPrivilegedWithException(PrivilegedAccessHelper.java:190)
	at org.eclipse.persistence.internal.security.PrivilegedAccessHelper.callDoPrivilegedWithException(PrivilegedAccessHelper.java:257)
	... 129 more
Caused by: java.lang.NullPointerException

java.lang.reflect.InvocationTargetException
	at jdk.internal.reflect.GeneratedMethodAccessor202.invoke(Unknown Source)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:568)
	at de.urmel_dl.dbt.utils.EntityFactory.lambda$new$1(EntityFactory.java:137)
	at de.urmel_dl.dbt.utils.EntityFactory.toDocument(EntityFactory.java:341)
	at de.urmel_dl.dbt.rc.resolver.PeriodResolver.resolve(PeriodResolver.java:93)
	at org.mycore.common.xml.MCRURIResolver.resolve(MCRURIResolver.java:343)
	at org.apache.xpath.SourceTreeManager.resolveURI(SourceTreeManager.java:127)
	at org.apache.xalan.templates.FuncDocument.getDoc(FuncDocument.java:237)
	at org.apache.xalan.templates.FuncDocument.execute(FuncDocument.java:194)
	at org.apache.xpath.XPath.execute(XPath.java:337)
	at org.apache.xalan.templates.ElemVariable.getValue(ElemVariable.java:280)
	at org.apache.xalan.templates.ElemVariable.execute(ElemVariable.java:248)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.java:1376)
	at org.apache.xalan.templates.ElemApplyTemplates.transformSelectedNodes(ElemApplyTemplates.java:395)
	at org.apache.xalan.templates.ElemApplyTemplates.execute(ElemApplyTemplates.java:178)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.transformer.TransformerImpl.transformToRTF(TransformerImpl.java:1990)
	at org.apache.xalan.transformer.TransformerImpl.transformToRTF(TransformerImpl.java:1912)
	at org.apache.xalan.templates.ElemVariable.getValue(ElemVariable.java:312)
	at org.apache.xalan.templates.ElemVariable.execute(ElemVariable.java:248)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.templates.ElemIf.execute(ElemIf.java:162)
	at org.apache.xalan.templates.ElemForEach.transformSelectedNodes(ElemForEach.java:425)
	at org.apache.xalan.templates.ElemForEach.execute(ElemForEach.java:265)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.java:1376)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.templates.ElemTemplate.execute(ElemTemplate.java:394)
	at org.apache.xalan.templates.ElemCallTemplate.execute(ElemCallTemplate.java:248)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.templates.ElemChoose.execute(ElemChoose.java:141)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.java:1376)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.java:1376)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.java:1376)
	at org.apache.xalan.templates.ElemApplyTemplates.transformSelectedNodes(ElemApplyTemplates.java:395)
	at org.apache.xalan.templates.ElemApplyTemplates.execute(ElemApplyTemplates.java:178)
	at org.apache.xalan.templates.ElemApplyTemplates.transformSelectedNodes(ElemApplyTemplates.java:395)
	at org.apache.xalan.templates.ElemApplyTemplates.execute(ElemApplyTemplates.java:178)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.java:1376)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.transformer.TransformerImpl.applyTemplateToNode(TransformerImpl.java:2272)
	at org.apache.xalan.transformer.TransformerImpl.transformNode(TransformerImpl.java:1358)
	at org.apache.xalan.transformer.TransformerImpl.run(TransformerImpl.java:3449)
	at org.apache.xalan.transformer.TransformerHandlerImpl.endDocument(TransformerHandlerImpl.java:408)
	at java.xml/com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.endDocument(AbstractSAXParser.java:754)
	at java.xml/com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:547)
	at java.xml/com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:889)
	at java.xml/com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:825)
	at java.xml/com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:141)
	at java.xml/com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1224)
	at java.xml/com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:637)
	at org.mycore.common.content.transformer.MCRXSLTransformer.transform(MCRXSLTransformer.java:235)
	at org.mycore.common.xml.MCRLayoutService.transform(MCRLayoutService.java:201)
	at org.mycore.common.xml.MCRLayoutService.doLayout(MCRLayoutService.java:94)
	at de.urmel_dl.dbt.rc.servlets.SlotListServlet.doGetPost(SlotListServlet.java:268)
	at org.mycore.frontend.servlets.MCRServlet.doGet(MCRServlet.java:184)
	at org.mycore.frontend.servlets.MCRServlet.render(MCRServlet.java:502)
	at org.mycore.frontend.servlets.MCRServlet.processRenderingPhase(MCRServlet.java:467)
	at org.mycore.frontend.servlets.MCRServlet.doGetPost(MCRServlet.java:318)
	at org.mycore.frontend.servlets.MCRServlet.doGet(MCRServlet.java:156)
	at jakarta.servlet.http.HttpServlet.service(HttpServlet.java:564)
	at jakarta.servlet.http.HttpServlet.service(HttpServlet.java:658)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:205)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149)
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149)
	at org.mycore.frontend.filter.MCRWebAppBaseFilter.doFilter(MCRWebAppBaseFilter.java:41)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149)
	at org.mycore.frontend.filter.MCRRequestAuthenticationFilter.doFilter(MCRRequestAuthenticationFilter.java:57)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149)
	at org.mycore.frontend.filter.MCRRequestDebugFilter.doFilter(MCRRequestDebugFilter.java:75)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149)
	at org.apache.logging.log4j.web.Log4jServletFilter.doFilter(Log4jServletFilter.java:71)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:167)
	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:115)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:93)
	at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:673)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:340)
	at org.apache.coyote.ajp.AjpProcessor.service(AjpProcessor.java:431)
	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:63)
	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:896)
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1744)
	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:52)
	at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191)
	at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.base/java.lang.Thread.run(Thread.java:840)
Caused by: jakarta.xml.bind.MarshalException
 - with linked exception:
[Exception [EclipseLink-99] (Eclipse Persistence Services - 3.0.3.v202208191135): org.eclipse.persistence.exceptions.DescriptorException
Exception Description: The method [getAt] on the object [de.urmel_dl.dbt.rc.datamodel.Warning] triggered an exception.
Internal Exception: java.lang.reflect.InvocationTargetException
Target Invocation Exception: java.lang.NullPointerException
Mapping: org.eclipse.persistence.oxm.mappings.XMLDirectMapping[at-->@at]
Descriptor: XMLDescriptor(de.urmel_dl.dbt.rc.datamodel.Warning --> [DatabaseTable(warning)])]
	at org.eclipse.persistence.jaxb.JAXBMarshaller.marshal(JAXBMarshaller.java:550)
	... 102 more
Caused by: Exception [EclipseLink-99] (Eclipse Persistence Services - 3.0.3.v202208191135): org.eclipse.persistence.exceptions.DescriptorException
Exception Description: The method [getAt] on the object [de.urmel_dl.dbt.rc.datamodel.Warning] triggered an exception.
Internal Exception: java.lang.reflect.InvocationTargetException
Target Invocation Exception: java.lang.NullPointerException
Mapping: org.eclipse.persistence.oxm.mappings.XMLDirectMapping[at-->@at]
Descriptor: XMLDescriptor(de.urmel_dl.dbt.rc.datamodel.Warning --> [DatabaseTable(warning)])
	at org.eclipse.persistence.exceptions.DescriptorException.targetInvocationWhileGettingValueThruMethodAccessor(DescriptorException.java:1701)
	at org.eclipse.persistence.internal.descriptors.MethodAttributeAccessor.lambda$getAttributeValueFromObject$1(MethodAttributeAccessor.java:81)
	at org.eclipse.persistence.internal.security.PrivilegedAccessHelper.callDoPrivilegedWithException(PrivilegedAccessHelper.java:259)
	at org.eclipse.persistence.internal.descriptors.MethodAttributeAccessor.getAttributeValueFromObject(MethodAttributeAccessor.java:72)
	at org.eclipse.persistence.internal.descriptors.MethodAttributeAccessor.getAttributeValueFromObject(MethodAttributeAccessor.java:65)
	at org.eclipse.persistence.mappings.DatabaseMapping.getAttributeValueFromObject(DatabaseMapping.java:691)
	at org.eclipse.persistence.internal.oxm.record.ObjectMarshalContext.getAttributeValue(ObjectMarshalContext.java:57)
	at org.eclipse.persistence.internal.oxm.XMLDirectMappingNodeValue.marshal(XMLDirectMappingNodeValue.java:70)
	at org.eclipse.persistence.internal.oxm.NodeValue.marshal(NodeValue.java:104)
	at org.eclipse.persistence.internal.oxm.record.ObjectMarshalContext.marshal(ObjectMarshalContext.java:67)
	at org.eclipse.persistence.internal.oxm.XPathNode.marshal(XPathNode.java:451)
	at org.eclipse.persistence.internal.oxm.XPathObjectBuilder.marshalAttributes(XPathObjectBuilder.java:569)
	at org.eclipse.persistence.internal.oxm.TreeObjectBuilder.marshalAttributes(TreeObjectBuilder.java:132)
	at org.eclipse.persistence.internal.oxm.XPathNode.startElement(XPathNode.java:477)
	at org.eclipse.persistence.internal.oxm.XMLCompositeCollectionMappingNodeValue.marshalSingleValue(XMLCompositeCollectionMappingNodeValue.java:336)
	at org.eclipse.persistence.internal.oxm.XMLCompositeCollectionMappingNodeValue.marshal(XMLCompositeCollectionMappingNodeValue.java:104)
	at org.eclipse.persistence.internal.oxm.NodeValue.marshal(NodeValue.java:151)
	at org.eclipse.persistence.internal.oxm.NodeValue.marshal(NodeValue.java:104)
	at org.eclipse.persistence.internal.oxm.record.ObjectMarshalContext.marshal(ObjectMarshalContext.java:67)
	at org.eclipse.persistence.internal.oxm.XPathNode.marshal(XPathNode.java:451)
	at org.eclipse.persistence.internal.oxm.XPathNode.marshal(XPathNode.java:432)
	at org.eclipse.persistence.internal.oxm.XPathObjectBuilder.buildRow(XPathObjectBuilder.java:247)
	at org.eclipse.persistence.internal.oxm.TreeObjectBuilder.buildRow(TreeObjectBuilder.java:127)
	at org.eclipse.persistence.internal.oxm.TreeObjectBuilder.buildRow(TreeObjectBuilder.java:50)
	at org.eclipse.persistence.internal.oxm.XMLMarshaller.marshal(XMLMarshaller.java:786)
	at org.eclipse.persistence.internal.oxm.XMLMarshaller.marshal(XMLMarshaller.java:559)
	at org.eclipse.persistence.internal.oxm.XMLMarshaller.marshal(XMLMarshaller.java:512)
	at org.eclipse.persistence.internal.oxm.XMLMarshaller.marshal(XMLMarshaller.java:1030)
	at org.eclipse.persistence.oxm.XMLMarshaller.marshal(XMLMarshaller.java:200)
	at org.eclipse.persistence.jaxb.JAXBMarshaller.marshal(JAXBMarshaller.java:546)
	... 102 more
Caused by: java.lang.reflect.InvocationTargetException
	at jdk.internal.reflect.GeneratedMethodAccessor197.invoke(Unknown Source)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:568)
	at org.eclipse.persistence.internal.descriptors.MethodAttributeAccessor.lambda$getAttributeValueFromObject$0(MethodAttributeAccessor.java:74)
	at org.eclipse.persistence.internal.security.PrivilegedAccessHelper.callDoPrivilegedWithException(PrivilegedAccessHelper.java:190)
	at org.eclipse.persistence.internal.security.PrivilegedAccessHelper.callDoPrivilegedWithException(PrivilegedAccessHelper.java:257)
	... 129 more
Caused by: java.lang.NullPointerException

jakarta.xml.bind.MarshalException
 - with linked exception:
[Exception [EclipseLink-99] (Eclipse Persistence Services - 3.0.3.v202208191135): org.eclipse.persistence.exceptions.DescriptorException
Exception Description: The method [getAt] on the object [de.urmel_dl.dbt.rc.datamodel.Warning] triggered an exception.
Internal Exception: java.lang.reflect.InvocationTargetException
Target Invocation Exception: java.lang.NullPointerException
Mapping: org.eclipse.persistence.oxm.mappings.XMLDirectMapping[at-->@at]
Descriptor: XMLDescriptor(de.urmel_dl.dbt.rc.datamodel.Warning --> [DatabaseTable(warning)])]
	at org.eclipse.persistence.jaxb.JAXBMarshaller.marshal(JAXBMarshaller.java:550)
	at jdk.internal.reflect.GeneratedMethodAccessor202.invoke(Unknown Source)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:568)
	at de.urmel_dl.dbt.utils.EntityFactory.lambda$new$1(EntityFactory.java:137)
	at de.urmel_dl.dbt.utils.EntityFactory.toDocument(EntityFactory.java:341)
	at de.urmel_dl.dbt.rc.resolver.PeriodResolver.resolve(PeriodResolver.java:93)
	at org.mycore.common.xml.MCRURIResolver.resolve(MCRURIResolver.java:343)
	at org.apache.xpath.SourceTreeManager.resolveURI(SourceTreeManager.java:127)
	at org.apache.xalan.templates.FuncDocument.getDoc(FuncDocument.java:237)
	at org.apache.xalan.templates.FuncDocument.execute(FuncDocument.java:194)
	at org.apache.xpath.XPath.execute(XPath.java:337)
	at org.apache.xalan.templates.ElemVariable.getValue(ElemVariable.java:280)
	at org.apache.xalan.templates.ElemVariable.execute(ElemVariable.java:248)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.java:1376)
	at org.apache.xalan.templates.ElemApplyTemplates.transformSelectedNodes(ElemApplyTemplates.java:395)
	at org.apache.xalan.templates.ElemApplyTemplates.execute(ElemApplyTemplates.java:178)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.transformer.TransformerImpl.transformToRTF(TransformerImpl.java:1990)
	at org.apache.xalan.transformer.TransformerImpl.transformToRTF(TransformerImpl.java:1912)
	at org.apache.xalan.templates.ElemVariable.getValue(ElemVariable.java:312)
	at org.apache.xalan.templates.ElemVariable.execute(ElemVariable.java:248)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.templates.ElemIf.execute(ElemIf.java:162)
	at org.apache.xalan.templates.ElemForEach.transformSelectedNodes(ElemForEach.java:425)
	at org.apache.xalan.templates.ElemForEach.execute(ElemForEach.java:265)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.java:1376)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.templates.ElemTemplate.execute(ElemTemplate.java:394)
	at org.apache.xalan.templates.ElemCallTemplate.execute(ElemCallTemplate.java:248)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.templates.ElemChoose.execute(ElemChoose.java:141)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.java:1376)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.java:1376)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.java:1376)
	at org.apache.xalan.templates.ElemApplyTemplates.transformSelectedNodes(ElemApplyTemplates.java:395)
	at org.apache.xalan.templates.ElemApplyTemplates.execute(ElemApplyTemplates.java:178)
	at org.apache.xalan.templates.ElemApplyTemplates.transformSelectedNodes(ElemApplyTemplates.java:395)
	at org.apache.xalan.templates.ElemApplyTemplates.execute(ElemApplyTemplates.java:178)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.java:1376)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.transformer.TransformerImpl.applyTemplateToNode(TransformerImpl.java:2272)
	at org.apache.xalan.transformer.TransformerImpl.transformNode(TransformerImpl.java:1358)
	at org.apache.xalan.transformer.TransformerImpl.run(TransformerImpl.java:3449)
	at org.apache.xalan.transformer.TransformerHandlerImpl.endDocument(TransformerHandlerImpl.java:408)
	at java.xml/com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.endDocument(AbstractSAXParser.java:754)
	at java.xml/com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:547)
	at java.xml/com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:889)
	at java.xml/com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:825)
	at java.xml/com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:141)
	at java.xml/com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1224)
	at java.xml/com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:637)
	at org.mycore.common.content.transformer.MCRXSLTransformer.transform(MCRXSLTransformer.java:235)
	at org.mycore.common.xml.MCRLayoutService.transform(MCRLayoutService.java:201)
	at org.mycore.common.xml.MCRLayoutService.doLayout(MCRLayoutService.java:94)
	at de.urmel_dl.dbt.rc.servlets.SlotListServlet.doGetPost(SlotListServlet.java:268)
	at org.mycore.frontend.servlets.MCRServlet.doGet(MCRServlet.java:184)
	at org.mycore.frontend.servlets.MCRServlet.render(MCRServlet.java:502)
	at org.mycore.frontend.servlets.MCRServlet.processRenderingPhase(MCRServlet.java:467)
	at org.mycore.frontend.servlets.MCRServlet.doGetPost(MCRServlet.java:318)
	at org.mycore.frontend.servlets.MCRServlet.doGet(MCRServlet.java:156)
	at jakarta.servlet.http.HttpServlet.service(HttpServlet.java:564)
	at jakarta.servlet.http.HttpServlet.service(HttpServlet.java:658)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:205)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149)
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149)
	at org.mycore.frontend.filter.MCRWebAppBaseFilter.doFilter(MCRWebAppBaseFilter.java:41)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149)
	at org.mycore.frontend.filter.MCRRequestAuthenticationFilter.doFilter(MCRRequestAuthenticationFilter.java:57)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149)
	at org.mycore.frontend.filter.MCRRequestDebugFilter.doFilter(MCRRequestDebugFilter.java:75)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149)
	at org.apache.logging.log4j.web.Log4jServletFilter.doFilter(Log4jServletFilter.java:71)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:167)
	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:115)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:93)
	at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:673)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:340)
	at org.apache.coyote.ajp.AjpProcessor.service(AjpProcessor.java:431)
	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:63)
	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:896)
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1744)
	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:52)
	at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191)
	at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.base/java.lang.Thread.run(Thread.java:840)
Caused by: Exception [EclipseLink-99] (Eclipse Persistence Services - 3.0.3.v202208191135): org.eclipse.persistence.exceptions.DescriptorException
Exception Description: The method [getAt] on the object [de.urmel_dl.dbt.rc.datamodel.Warning] triggered an exception.
Internal Exception: java.lang.reflect.InvocationTargetException
Target Invocation Exception: java.lang.NullPointerException
Mapping: org.eclipse.persistence.oxm.mappings.XMLDirectMapping[at-->@at]
Descriptor: XMLDescriptor(de.urmel_dl.dbt.rc.datamodel.Warning --> [DatabaseTable(warning)])
	at org.eclipse.persistence.exceptions.DescriptorException.targetInvocationWhileGettingValueThruMethodAccessor(DescriptorException.java:1701)
	at org.eclipse.persistence.internal.descriptors.MethodAttributeAccessor.lambda$getAttributeValueFromObject$1(MethodAttributeAccessor.java:81)
	at org.eclipse.persistence.internal.security.PrivilegedAccessHelper.callDoPrivilegedWithException(PrivilegedAccessHelper.java:259)
	at org.eclipse.persistence.internal.descriptors.MethodAttributeAccessor.getAttributeValueFromObject(MethodAttributeAccessor.java:72)
	at org.eclipse.persistence.internal.descriptors.MethodAttributeAccessor.getAttributeValueFromObject(MethodAttributeAccessor.java:65)
	at org.eclipse.persistence.mappings.DatabaseMapping.getAttributeValueFromObject(DatabaseMapping.java:691)
	at org.eclipse.persistence.internal.oxm.record.ObjectMarshalContext.getAttributeValue(ObjectMarshalContext.java:57)
	at org.eclipse.persistence.internal.oxm.XMLDirectMappingNodeValue.marshal(XMLDirectMappingNodeValue.java:70)
	at org.eclipse.persistence.internal.oxm.NodeValue.marshal(NodeValue.java:104)
	at org.eclipse.persistence.internal.oxm.record.ObjectMarshalContext.marshal(ObjectMarshalContext.java:67)
	at org.eclipse.persistence.internal.oxm.XPathNode.marshal(XPathNode.java:451)
	at org.eclipse.persistence.internal.oxm.XPathObjectBuilder.marshalAttributes(XPathObjectBuilder.java:569)
	at org.eclipse.persistence.internal.oxm.TreeObjectBuilder.marshalAttributes(TreeObjectBuilder.java:132)
	at org.eclipse.persistence.internal.oxm.XPathNode.startElement(XPathNode.java:477)
	at org.eclipse.persistence.internal.oxm.XMLCompositeCollectionMappingNodeValue.marshalSingleValue(XMLCompositeCollectionMappingNodeValue.java:336)
	at org.eclipse.persistence.internal.oxm.XMLCompositeCollectionMappingNodeValue.marshal(XMLCompositeCollectionMappingNodeValue.java:104)
	at org.eclipse.persistence.internal.oxm.NodeValue.marshal(NodeValue.java:151)
	at org.eclipse.persistence.internal.oxm.NodeValue.marshal(NodeValue.java:104)
	at org.eclipse.persistence.internal.oxm.record.ObjectMarshalContext.marshal(ObjectMarshalContext.java:67)
	at org.eclipse.persistence.internal.oxm.XPathNode.marshal(XPathNode.java:451)
	at org.eclipse.persistence.internal.oxm.XPathNode.marshal(XPathNode.java:432)
	at org.eclipse.persistence.internal.oxm.XPathObjectBuilder.buildRow(XPathObjectBuilder.java:247)
	at org.eclipse.persistence.internal.oxm.TreeObjectBuilder.buildRow(TreeObjectBuilder.java:127)
	at org.eclipse.persistence.internal.oxm.TreeObjectBuilder.buildRow(TreeObjectBuilder.java:50)
	at org.eclipse.persistence.internal.oxm.XMLMarshaller.marshal(XMLMarshaller.java:786)
	at org.eclipse.persistence.internal.oxm.XMLMarshaller.marshal(XMLMarshaller.java:559)
	at org.eclipse.persistence.internal.oxm.XMLMarshaller.marshal(XMLMarshaller.java:512)
	at org.eclipse.persistence.internal.oxm.XMLMarshaller.marshal(XMLMarshaller.java:1030)
	at org.eclipse.persistence.oxm.XMLMarshaller.marshal(XMLMarshaller.java:200)
	at org.eclipse.persistence.jaxb.JAXBMarshaller.marshal(JAXBMarshaller.java:546)
	... 102 more
Caused by: java.lang.reflect.InvocationTargetException
	at jdk.internal.reflect.GeneratedMethodAccessor197.invoke(Unknown Source)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:568)
	at org.eclipse.persistence.internal.descriptors.MethodAttributeAccessor.lambda$getAttributeValueFromObject$0(MethodAttributeAccessor.java:74)
	at org.eclipse.persistence.internal.security.PrivilegedAccessHelper.callDoPrivilegedWithException(PrivilegedAccessHelper.java:190)
	at org.eclipse.persistence.internal.security.PrivilegedAccessHelper.callDoPrivilegedWithException(PrivilegedAccessHelper.java:257)
	... 129 more
Caused by: java.lang.NullPointerException

Local Exception Stack: 
Exception [EclipseLink-99] (Eclipse Persistence Services - 3.0.3.v202208191135): org.eclipse.persistence.exceptions.DescriptorException
Exception Description: The method [getAt] on the object [de.urmel_dl.dbt.rc.datamodel.Warning] triggered an exception.
Internal Exception: java.lang.reflect.InvocationTargetException
Target Invocation Exception: java.lang.NullPointerException
Mapping: org.eclipse.persistence.oxm.mappings.XMLDirectMapping[at-->@at]
Descriptor: XMLDescriptor(de.urmel_dl.dbt.rc.datamodel.Warning --> [DatabaseTable(warning)])
	at org.eclipse.persistence.exceptions.DescriptorException.targetInvocationWhileGettingValueThruMethodAccessor(DescriptorException.java:1701)
	at org.eclipse.persistence.internal.descriptors.MethodAttributeAccessor.lambda$getAttributeValueFromObject$1(MethodAttributeAccessor.java:81)
	at org.eclipse.persistence.internal.security.PrivilegedAccessHelper.callDoPrivilegedWithException(PrivilegedAccessHelper.java:259)
	at org.eclipse.persistence.internal.descriptors.MethodAttributeAccessor.getAttributeValueFromObject(MethodAttributeAccessor.java:72)
	at org.eclipse.persistence.internal.descriptors.MethodAttributeAccessor.getAttributeValueFromObject(MethodAttributeAccessor.java:65)
	at org.eclipse.persistence.mappings.DatabaseMapping.getAttributeValueFromObject(DatabaseMapping.java:691)
	at org.eclipse.persistence.internal.oxm.record.ObjectMarshalContext.getAttributeValue(ObjectMarshalContext.java:57)
	at org.eclipse.persistence.internal.oxm.XMLDirectMappingNodeValue.marshal(XMLDirectMappingNodeValue.java:70)
	at org.eclipse.persistence.internal.oxm.NodeValue.marshal(NodeValue.java:104)
	at org.eclipse.persistence.internal.oxm.record.ObjectMarshalContext.marshal(ObjectMarshalContext.java:67)
	at org.eclipse.persistence.internal.oxm.XPathNode.marshal(XPathNode.java:451)
	at org.eclipse.persistence.internal.oxm.XPathObjectBuilder.marshalAttributes(XPathObjectBuilder.java:569)
	at org.eclipse.persistence.internal.oxm.TreeObjectBuilder.marshalAttributes(TreeObjectBuilder.java:132)
	at org.eclipse.persistence.internal.oxm.XPathNode.startElement(XPathNode.java:477)
	at org.eclipse.persistence.internal.oxm.XMLCompositeCollectionMappingNodeValue.marshalSingleValue(XMLCompositeCollectionMappingNodeValue.java:336)
	at org.eclipse.persistence.internal.oxm.XMLCompositeCollectionMappingNodeValue.marshal(XMLCompositeCollectionMappingNodeValue.java:104)
	at org.eclipse.persistence.internal.oxm.NodeValue.marshal(NodeValue.java:151)
	at org.eclipse.persistence.internal.oxm.NodeValue.marshal(NodeValue.java:104)
	at org.eclipse.persistence.internal.oxm.record.ObjectMarshalContext.marshal(ObjectMarshalContext.java:67)
	at org.eclipse.persistence.internal.oxm.XPathNode.marshal(XPathNode.java:451)
	at org.eclipse.persistence.internal.oxm.XPathNode.marshal(XPathNode.java:432)
	at org.eclipse.persistence.internal.oxm.XPathObjectBuilder.buildRow(XPathObjectBuilder.java:247)
	at org.eclipse.persistence.internal.oxm.TreeObjectBuilder.buildRow(TreeObjectBuilder.java:127)
	at org.eclipse.persistence.internal.oxm.TreeObjectBuilder.buildRow(TreeObjectBuilder.java:50)
	at org.eclipse.persistence.internal.oxm.XMLMarshaller.marshal(XMLMarshaller.java:786)
	at org.eclipse.persistence.internal.oxm.XMLMarshaller.marshal(XMLMarshaller.java:559)
	at org.eclipse.persistence.internal.oxm.XMLMarshaller.marshal(XMLMarshaller.java:512)
	at org.eclipse.persistence.internal.oxm.XMLMarshaller.marshal(XMLMarshaller.java:1030)
	at org.eclipse.persistence.oxm.XMLMarshaller.marshal(XMLMarshaller.java:200)
	at org.eclipse.persistence.jaxb.JAXBMarshaller.marshal(JAXBMarshaller.java:546)
	at jdk.internal.reflect.GeneratedMethodAccessor202.invoke(Unknown Source)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:568)
	at de.urmel_dl.dbt.utils.EntityFactory.lambda$new$1(EntityFactory.java:137)
	at de.urmel_dl.dbt.utils.EntityFactory.toDocument(EntityFactory.java:341)
	at de.urmel_dl.dbt.rc.resolver.PeriodResolver.resolve(PeriodResolver.java:93)
	at org.mycore.common.xml.MCRURIResolver.resolve(MCRURIResolver.java:343)
	at org.apache.xpath.SourceTreeManager.resolveURI(SourceTreeManager.java:127)
	at org.apache.xalan.templates.FuncDocument.getDoc(FuncDocument.java:237)
	at org.apache.xalan.templates.FuncDocument.execute(FuncDocument.java:194)
	at org.apache.xpath.XPath.execute(XPath.java:337)
	at org.apache.xalan.templates.ElemVariable.getValue(ElemVariable.java:280)
	at org.apache.xalan.templates.ElemVariable.execute(ElemVariable.java:248)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.java:1376)
	at org.apache.xalan.templates.ElemApplyTemplates.transformSelectedNodes(ElemApplyTemplates.java:395)
	at org.apache.xalan.templates.ElemApplyTemplates.execute(ElemApplyTemplates.java:178)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.transformer.TransformerImpl.transformToRTF(TransformerImpl.java:1990)
	at org.apache.xalan.transformer.TransformerImpl.transformToRTF(TransformerImpl.java:1912)
	at org.apache.xalan.templates.ElemVariable.getValue(ElemVariable.java:312)
	at org.apache.xalan.templates.ElemVariable.execute(ElemVariable.java:248)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.templates.ElemIf.execute(ElemIf.java:162)
	at org.apache.xalan.templates.ElemForEach.transformSelectedNodes(ElemForEach.java:425)
	at org.apache.xalan.templates.ElemForEach.execute(ElemForEach.java:265)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.java:1376)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.templates.ElemTemplate.execute(ElemTemplate.java:394)
	at org.apache.xalan.templates.ElemCallTemplate.execute(ElemCallTemplate.java:248)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.templates.ElemChoose.execute(ElemChoose.java:141)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.java:1376)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.java:1376)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.java:1376)
	at org.apache.xalan.templates.ElemApplyTemplates.transformSelectedNodes(ElemApplyTemplates.java:395)
	at org.apache.xalan.templates.ElemApplyTemplates.execute(ElemApplyTemplates.java:178)
	at org.apache.xalan.templates.ElemApplyTemplates.transformSelectedNodes(ElemApplyTemplates.java:395)
	at org.apache.xalan.templates.ElemApplyTemplates.execute(ElemApplyTemplates.java:178)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.java:1376)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.transformer.TransformerImpl.applyTemplateToNode(TransformerImpl.java:2272)
	at org.apache.xalan.transformer.TransformerImpl.transformNode(TransformerImpl.java:1358)
	at org.apache.xalan.transformer.TransformerImpl.run(TransformerImpl.java:3449)
	at org.apache.xalan.transformer.TransformerHandlerImpl.endDocument(TransformerHandlerImpl.java:408)
	at java.xml/com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.endDocument(AbstractSAXParser.java:754)
	at java.xml/com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:547)
	at java.xml/com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:889)
	at java.xml/com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:825)
	at java.xml/com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:141)
	at java.xml/com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1224)
	at java.xml/com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:637)
	at org.mycore.common.content.transformer.MCRXSLTransformer.transform(MCRXSLTransformer.java:235)
	at org.mycore.common.xml.MCRLayoutService.transform(MCRLayoutService.java:201)
	at org.mycore.common.xml.MCRLayoutService.doLayout(MCRLayoutService.java:94)
	at de.urmel_dl.dbt.rc.servlets.SlotListServlet.doGetPost(SlotListServlet.java:268)
	at org.mycore.frontend.servlets.MCRServlet.doGet(MCRServlet.java:184)
	at org.mycore.frontend.servlets.MCRServlet.render(MCRServlet.java:502)
	at org.mycore.frontend.servlets.MCRServlet.processRenderingPhase(MCRServlet.java:467)
	at org.mycore.frontend.servlets.MCRServlet.doGetPost(MCRServlet.java:318)
	at org.mycore.frontend.servlets.MCRServlet.doGet(MCRServlet.java:156)
	at jakarta.servlet.http.HttpServlet.service(HttpServlet.java:564)
	at jakarta.servlet.http.HttpServlet.service(HttpServlet.java:658)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:205)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149)
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149)
	at org.mycore.frontend.filter.MCRWebAppBaseFilter.doFilter(MCRWebAppBaseFilter.java:41)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149)
	at org.mycore.frontend.filter.MCRRequestAuthenticationFilter.doFilter(MCRRequestAuthenticationFilter.java:57)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149)
	at org.mycore.frontend.filter.MCRRequestDebugFilter.doFilter(MCRRequestDebugFilter.java:75)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149)
	at org.apache.logging.log4j.web.Log4jServletFilter.doFilter(Log4jServletFilter.java:71)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:167)
	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:115)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:93)
	at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:673)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:340)
	at org.apache.coyote.ajp.AjpProcessor.service(AjpProcessor.java:431)
	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:63)
	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:896)
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1744)
	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:52)
	at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191)
	at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.base/java.lang.Thread.run(Thread.java:840)
Caused by: java.lang.reflect.InvocationTargetException
	at jdk.internal.reflect.GeneratedMethodAccessor197.invoke(Unknown Source)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:568)
	at org.eclipse.persistence.internal.descriptors.MethodAttributeAccessor.lambda$getAttributeValueFromObject$0(MethodAttributeAccessor.java:74)
	at org.eclipse.persistence.internal.security.PrivilegedAccessHelper.callDoPrivilegedWithException(PrivilegedAccessHelper.java:190)
	at org.eclipse.persistence.internal.security.PrivilegedAccessHelper.callDoPrivilegedWithException(PrivilegedAccessHelper.java:257)
	... 129 more
Caused by: java.lang.NullPointerException

java.lang.reflect.InvocationTargetException
	at jdk.internal.reflect.GeneratedMethodAccessor197.invoke(Unknown Source)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:568)
	at org.eclipse.persistence.internal.descriptors.MethodAttributeAccessor.lambda$getAttributeValueFromObject$0(MethodAttributeAccessor.java:74)
	at org.eclipse.persistence.internal.security.PrivilegedAccessHelper.callDoPrivilegedWithException(PrivilegedAccessHelper.java:190)
	at org.eclipse.persistence.internal.security.PrivilegedAccessHelper.callDoPrivilegedWithException(PrivilegedAccessHelper.java:257)
	at org.eclipse.persistence.internal.descriptors.MethodAttributeAccessor.getAttributeValueFromObject(MethodAttributeAccessor.java:72)
	at org.eclipse.persistence.internal.descriptors.MethodAttributeAccessor.getAttributeValueFromObject(MethodAttributeAccessor.java:65)
	at org.eclipse.persistence.mappings.DatabaseMapping.getAttributeValueFromObject(DatabaseMapping.java:691)
	at org.eclipse.persistence.internal.oxm.record.ObjectMarshalContext.getAttributeValue(ObjectMarshalContext.java:57)
	at org.eclipse.persistence.internal.oxm.XMLDirectMappingNodeValue.marshal(XMLDirectMappingNodeValue.java:70)
	at org.eclipse.persistence.internal.oxm.NodeValue.marshal(NodeValue.java:104)
	at org.eclipse.persistence.internal.oxm.record.ObjectMarshalContext.marshal(ObjectMarshalContext.java:67)
	at org.eclipse.persistence.internal.oxm.XPathNode.marshal(XPathNode.java:451)
	at org.eclipse.persistence.internal.oxm.XPathObjectBuilder.marshalAttributes(XPathObjectBuilder.java:569)
	at org.eclipse.persistence.internal.oxm.TreeObjectBuilder.marshalAttributes(TreeObjectBuilder.java:132)
	at org.eclipse.persistence.internal.oxm.XPathNode.startElement(XPathNode.java:477)
	at org.eclipse.persistence.internal.oxm.XMLCompositeCollectionMappingNodeValue.marshalSingleValue(XMLCompositeCollectionMappingNodeValue.java:336)
	at org.eclipse.persistence.internal.oxm.XMLCompositeCollectionMappingNodeValue.marshal(XMLCompositeCollectionMappingNodeValue.java:104)
	at org.eclipse.persistence.internal.oxm.NodeValue.marshal(NodeValue.java:151)
	at org.eclipse.persistence.internal.oxm.NodeValue.marshal(NodeValue.java:104)
	at org.eclipse.persistence.internal.oxm.record.ObjectMarshalContext.marshal(ObjectMarshalContext.java:67)
	at org.eclipse.persistence.internal.oxm.XPathNode.marshal(XPathNode.java:451)
	at org.eclipse.persistence.internal.oxm.XPathNode.marshal(XPathNode.java:432)
	at org.eclipse.persistence.internal.oxm.XPathObjectBuilder.buildRow(XPathObjectBuilder.java:247)
	at org.eclipse.persistence.internal.oxm.TreeObjectBuilder.buildRow(TreeObjectBuilder.java:127)
	at org.eclipse.persistence.internal.oxm.TreeObjectBuilder.buildRow(TreeObjectBuilder.java:50)
	at org.eclipse.persistence.internal.oxm.XMLMarshaller.marshal(XMLMarshaller.java:786)
	at org.eclipse.persistence.internal.oxm.XMLMarshaller.marshal(XMLMarshaller.java:559)
	at org.eclipse.persistence.internal.oxm.XMLMarshaller.marshal(XMLMarshaller.java:512)
	at org.eclipse.persistence.internal.oxm.XMLMarshaller.marshal(XMLMarshaller.java:1030)
	at org.eclipse.persistence.oxm.XMLMarshaller.marshal(XMLMarshaller.java:200)
	at org.eclipse.persistence.jaxb.JAXBMarshaller.marshal(JAXBMarshaller.java:546)
	at jdk.internal.reflect.GeneratedMethodAccessor202.invoke(Unknown Source)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:568)
	at de.urmel_dl.dbt.utils.EntityFactory.lambda$new$1(EntityFactory.java:137)
	at de.urmel_dl.dbt.utils.EntityFactory.toDocument(EntityFactory.java:341)
	at de.urmel_dl.dbt.rc.resolver.PeriodResolver.resolve(PeriodResolver.java:93)
	at org.mycore.common.xml.MCRURIResolver.resolve(MCRURIResolver.java:343)
	at org.apache.xpath.SourceTreeManager.resolveURI(SourceTreeManager.java:127)
	at org.apache.xalan.templates.FuncDocument.getDoc(FuncDocument.java:237)
	at org.apache.xalan.templates.FuncDocument.execute(FuncDocument.java:194)
	at org.apache.xpath.XPath.execute(XPath.java:337)
	at org.apache.xalan.templates.ElemVariable.getValue(ElemVariable.java:280)
	at org.apache.xalan.templates.ElemVariable.execute(ElemVariable.java:248)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.java:1376)
	at org.apache.xalan.templates.ElemApplyTemplates.transformSelectedNodes(ElemApplyTemplates.java:395)
	at org.apache.xalan.templates.ElemApplyTemplates.execute(ElemApplyTemplates.java:178)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.transformer.TransformerImpl.transformToRTF(TransformerImpl.java:1990)
	at org.apache.xalan.transformer.TransformerImpl.transformToRTF(TransformerImpl.java:1912)
	at org.apache.xalan.templates.ElemVariable.getValue(ElemVariable.java:312)
	at org.apache.xalan.templates.ElemVariable.execute(ElemVariable.java:248)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.templates.ElemIf.execute(ElemIf.java:162)
	at org.apache.xalan.templates.ElemForEach.transformSelectedNodes(ElemForEach.java:425)
	at org.apache.xalan.templates.ElemForEach.execute(ElemForEach.java:265)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.java:1376)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.templates.ElemTemplate.execute(ElemTemplate.java:394)
	at org.apache.xalan.templates.ElemCallTemplate.execute(ElemCallTemplate.java:248)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.templates.ElemChoose.execute(ElemChoose.java:141)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.java:1376)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.java:1376)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.java:1376)
	at org.apache.xalan.templates.ElemApplyTemplates.transformSelectedNodes(ElemApplyTemplates.java:395)
	at org.apache.xalan.templates.ElemApplyTemplates.execute(ElemApplyTemplates.java:178)
	at org.apache.xalan.templates.ElemApplyTemplates.transformSelectedNodes(ElemApplyTemplates.java:395)
	at org.apache.xalan.templates.ElemApplyTemplates.execute(ElemApplyTemplates.java:178)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.java:1376)
	at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2402)
	at org.apache.xalan.transformer.TransformerImpl.applyTemplateToNode(TransformerImpl.java:2272)
	at org.apache.xalan.transformer.TransformerImpl.transformNode(TransformerImpl.java:1358)
	at org.apache.xalan.transformer.TransformerImpl.run(TransformerImpl.java:3449)
	at org.apache.xalan.transformer.TransformerHandlerImpl.endDocument(TransformerHandlerImpl.java:408)
	at java.xml/com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.endDocument(AbstractSAXParser.java:754)
	at java.xml/com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:547)
	at java.xml/com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:889)
	at java.xml/com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:825)
	at java.xml/com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:141)
	at java.xml/com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1224)
	at java.xml/com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:637)
	at org.mycore.common.content.transformer.MCRXSLTransformer.transform(MCRXSLTransformer.java:235)
	at org.mycore.common.xml.MCRLayoutService.transform(MCRLayoutService.java:201)
	at org.mycore.common.xml.MCRLayoutService.doLayout(MCRLayoutService.java:94)
	at de.urmel_dl.dbt.rc.servlets.SlotListServlet.doGetPost(SlotListServlet.java:268)
	at org.mycore.frontend.servlets.MCRServlet.doGet(MCRServlet.java:184)
	at org.mycore.frontend.servlets.MCRServlet.render(MCRServlet.java:502)
	at org.mycore.frontend.servlets.MCRServlet.processRenderingPhase(MCRServlet.java:467)
	at org.mycore.frontend.servlets.MCRServlet.doGetPost(MCRServlet.java:318)
	at org.mycore.frontend.servlets.MCRServlet.doGet(MCRServlet.java:156)
	at jakarta.servlet.http.HttpServlet.service(HttpServlet.java:564)
	at jakarta.servlet.http.HttpServlet.service(HttpServlet.java:658)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:205)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149)
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149)
	at org.mycore.frontend.filter.MCRWebAppBaseFilter.doFilter(MCRWebAppBaseFilter.java:41)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149)
	at org.mycore.frontend.filter.MCRRequestAuthenticationFilter.doFilter(MCRRequestAuthenticationFilter.java:57)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149)
	at org.mycore.frontend.filter.MCRRequestDebugFilter.doFilter(MCRRequestDebugFilter.java:75)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149)
	at org.apache.logging.log4j.web.Log4jServletFilter.doFilter(Log4jServletFilter.java:71)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:167)
	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:115)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:93)
	at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:673)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:340)
	at org.apache.coyote.ajp.AjpProcessor.service(AjpProcessor.java:431)
	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:63)
	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:896)
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1744)
	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:52)
	at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191)
	at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.base/java.lang.Thread.run(Thread.java:840)
Caused by: java.lang.NullPointerException

java.lang.NullPointerException