Topic Classification
Registered models and training datasets used by the Topic Classification
Enhancement Engine.
Topic Model | Enhancement Chains | Training Set |
dbpedia-category-model
(TopicClassificationEngine)
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get(chainNames) failed on instance of org.apache.stanbol.enhancer.engine.topic.TopicClassificationEngine
The problematic instruction:
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==> list classifier.chainNames as chainName [on line 38, column 10 in html/org/apache/stanbol/enhancer/web/topic/resource/TopicClassifierRootResource/index]
in user-directive common.page [on line 19, column 1 in html/org/apache/stanbol/enhancer/web/topic/resource/TopicClassifierRootResource/index]
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Java backtrace for programmers:
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freemarker.template.TemplateModelException: get(chainNames) failed on instance of org.apache.stanbol.enhancer.engine.topic.TopicClassificationEngine
at freemarker.ext.beans.BeanModel.get(BeanModel.java:224)
at freemarker.core.Dot._getAsTemplateModel(Dot.java:76)
at freemarker.core.Expression.getAsTemplateModel(Expression.java:89)
at freemarker.core.IteratorBlock.accept(IteratorBlock.java:94)
at freemarker.core.Environment.visit(Environment.java:221)
at freemarker.core.MixedContent.accept(MixedContent.java:92)
at freemarker.core.Environment.visit(Environment.java:221)
at freemarker.core.IteratorBlock$Context.runLoop(IteratorBlock.java:179)
at freemarker.core.Environment.visit(Environment.java:428)
at freemarker.core.IteratorBlock.accept(IteratorBlock.java:102)
at freemarker.core.Environment.visit(Environment.java:221)
at freemarker.core.MixedContent.accept(MixedContent.java:92)
at freemarker.core.Environment.visit(Environment.java:221)
at freemarker.core.Environment.visit(Environment.java:406)
at freemarker.core.BodyInstruction.accept(BodyInstruction.java:93)
at freemarker.core.Environment.visit(Environment.java:221)
at freemarker.core.MixedContent.accept(MixedContent.java:92)
at freemarker.core.Environment.visit(Environment.java:221)
at freemarker.core.Macro$Context.runMacro(Macro.java:172)
at freemarker.core.Environment.visit(Environment.java:614)
at freemarker.core.UnifiedCall.accept(UnifiedCall.java:106)
at freemarker.core.Environment.visit(Environment.java:221)
at freemarker.core.EscapeBlock.accept(EscapeBlock.java:84)
at freemarker.core.Environment.visit(Environment.java:221)
at freemarker.core.MixedContent.accept(MixedContent.java:92)
at freemarker.core.Environment.visit(Environment.java:221)
at freemarker.core.Environment.process(Environment.java:199)
at freemarker.template.Template.process(Template.java:259)
at org.apache.stanbol.commons.viewable.writer.impl.ViewableWriter.renderPojo(ViewableWriter.java:90)
at org.apache.stanbol.commons.viewable.writer.impl.ViewableWriter.writeTo(ViewableWriter.java:74)
at org.apache.stanbol.commons.viewable.writer.impl.ViewableWriter.writeTo(ViewableWriter.java:43)
at com.sun.jersey.spi.container.ContainerResponse.write(ContainerResponse.java:302)
at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1510)
at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1419)
at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1409)
at com.sun.jersey.spi.container.servlet.WebComponent.service(WebComponent.java:409)
at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:540)
at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:715)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at org.apache.felix.http.base.internal.handler.ServletHandler.doHandle(ServletHandler.java:339)
at org.apache.felix.http.base.internal.handler.ServletHandler.handle(ServletHandler.java:300)
at org.apache.felix.http.base.internal.dispatch.ServletPipeline.handle(ServletPipeline.java:93)
at org.apache.felix.http.base.internal.dispatch.InvocationFilterChain.doFilter(InvocationFilterChain.java:50)
at org.apache.felix.http.base.internal.dispatch.HttpFilterChain.doFilter(HttpFilterChain.java:31)
at org.apache.stanbol.commons.httpqueryheaders.impl.QueryHeadersFilter.doFilter(QueryHeadersFilter.java:84)
at org.apache.felix.http.base.internal.handler.FilterHandler.doHandle(FilterHandler.java:108)
at org.apache.felix.http.base.internal.handler.FilterHandler.handle(FilterHandler.java:80)
at org.apache.felix.http.base.internal.dispatch.InvocationFilterChain.doFilter(InvocationFilterChain.java:46)
at org.apache.felix.http.base.internal.dispatch.HttpFilterChain.doFilter(HttpFilterChain.java:31)
at org.apache.felix.http.base.internal.handler.FilterHandler.handle(FilterHandler.java:84)
at org.apache.felix.http.base.internal.dispatch.InvocationFilterChain.doFilter(InvocationFilterChain.java:46)
at org.apache.felix.http.base.internal.dispatch.HttpFilterChain.doFilter(HttpFilterChain.java:31)
at org.apache.stanbol.commons.web.resources.ResourceServingFilter.doFilterHttp(ResourceServingFilter.java:148)
at org.apache.stanbol.commons.web.resources.ResourceServingFilter.doFilter(ResourceServingFilter.java:91)
at org.apache.felix.http.base.internal.handler.FilterHandler.doHandle(FilterHandler.java:108)
at org.apache.felix.http.base.internal.handler.FilterHandler.handle(FilterHandler.java:80)
at org.apache.felix.http.base.internal.dispatch.InvocationFilterChain.doFilter(InvocationFilterChain.java:46)
at org.apache.felix.http.base.internal.dispatch.HttpFilterChain.doFilter(HttpFilterChain.java:31)
at org.apache.stanbol.commons.security.auth.AuthenticatingFilter$1.run(AuthenticatingFilter.java:163)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAsPrivileged(Subject.java:536)
at org.apache.stanbol.commons.security.auth.AuthenticatingFilter.doFilter(AuthenticatingFilter.java:159)
at org.apache.felix.http.base.internal.handler.FilterHandler.doHandle(FilterHandler.java:108)
at org.apache.felix.http.base.internal.handler.FilterHandler.handle(FilterHandler.java:80)
at org.apache.felix.http.base.internal.dispatch.InvocationFilterChain.doFilter(InvocationFilterChain.java:46)
at org.apache.felix.http.base.internal.dispatch.HttpFilterChain.doFilter(HttpFilterChain.java:31)
at org.apache.felix.http.base.internal.dispatch.FilterPipeline.dispatch(FilterPipeline.java:76)
at org.apache.felix.http.base.internal.dispatch.Dispatcher.dispatch(Dispatcher.java:49)
at org.apache.felix.http.base.internal.DispatcherServlet.service(DispatcherServlet.java:67)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:684)
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:501)
at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:229)
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1086)
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:428)
at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:193)
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1020)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:135)
at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:255)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:116)
at org.eclipse.jetty.server.Server.handle(Server.java:370)
at org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:494)
at org.eclipse.jetty.server.AbstractHttpConnection.headerComplete(AbstractHttpConnection.java:971)
at org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.headerComplete(AbstractHttpConnection.java:1033)
at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:644)
at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:235)
at org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:82)
at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:667)
at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:52)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:608)
at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:543)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at freemarker.ext.beans.BeansWrapper.invokeMethod(BeansWrapper.java:866)
at freemarker.ext.beans.BeanModel.invokeThroughDescriptor(BeanModel.java:277)
at freemarker.ext.beans.BeanModel.get(BeanModel.java:184)
... 91 more
Caused by: java.lang.NullPointerException
at org.apache.stanbol.enhancer.engine.topic.TopicClassificationEngine.getChainNames(TopicClassificationEngine.java:1500)
... 98 more
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