HTTP Status 500 - Request processing failed; nested exception is org.thymeleaf.exceptions.TemplateProcessingException: Exception evaluating SpringEL expression: "news.title" (/news/news_detail:4)

type Exception report

message Request processing failed; nested exception is org.thymeleaf.exceptions.TemplateProcessingException: Exception evaluating SpringEL expression: "news.title" (/news/news_detail:4)

description The server encountered an internal error that prevented it from fulfilling this request.

exception

org.springframework.web.util.NestedServletException: Request processing failed; nested exception is org.thymeleaf.exceptions.TemplateProcessingException: Exception evaluating SpringEL expression: "news.title" (/news/news_detail:4)
	org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:982)
	org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:861)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:622)
	org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
	org.springframework.orm.jpa.support.OpenEntityManagerInViewFilter.doFilterInternal(OpenEntityManagerInViewFilter.java:177)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:77)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:85)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)

root cause

org.thymeleaf.exceptions.TemplateProcessingException: Exception evaluating SpringEL expression: "news.title" (/news/news_detail:4)
	org.thymeleaf.spring4.expression.SpelVariableExpressionEvaluator.evaluate(SpelVariableExpressionEvaluator.java:161)
	org.thymeleaf.standard.expression.VariableExpression.executeVariable(VariableExpression.java:154)
	org.thymeleaf.standard.expression.SimpleExpression.executeSimple(SimpleExpression.java:59)
	org.thymeleaf.standard.expression.Expression.execute(Expression.java:103)
	org.thymeleaf.standard.expression.Expression.execute(Expression.java:133)
	org.thymeleaf.standard.expression.Expression.execute(Expression.java:120)
	org.thymeleaf.standard.processor.attr.AbstractStandardTextChildModifierAttrProcessor.getText(AbstractStandardTextChildModifierAttrProcessor.java:68)
	org.thymeleaf.processor.attr.AbstractTextChildModifierAttrProcessor.getModifiedChildren(AbstractTextChildModifierAttrProcessor.java:59)
	org.thymeleaf.processor.attr.AbstractChildrenModifierAttrProcessor.processAttribute(AbstractChildrenModifierAttrProcessor.java:59)
	org.thymeleaf.processor.attr.AbstractAttrProcessor.doProcess(AbstractAttrProcessor.java:87)
	org.thymeleaf.processor.AbstractProcessor.process(AbstractProcessor.java:212)
	org.thymeleaf.dom.Node.applyNextProcessor(Node.java:1017)
	org.thymeleaf.dom.Node.processNode(Node.java:972)
	org.thymeleaf.dom.NestableNode.computeNextChild(NestableNode.java:695)
	org.thymeleaf.dom.NestableNode.doAdditionalProcess(NestableNode.java:668)
	org.thymeleaf.dom.Node.processNode(Node.java:990)
	org.thymeleaf.dom.NestableNode.computeNextChild(NestableNode.java:695)
	org.thymeleaf.dom.NestableNode.doAdditionalProcess(NestableNode.java:668)
	org.thymeleaf.dom.Node.processNode(Node.java:990)
	org.thymeleaf.dom.NestableNode.computeNextChild(NestableNode.java:695)
	org.thymeleaf.dom.NestableNode.doAdditionalProcess(NestableNode.java:668)
	org.thymeleaf.dom.Node.processNode(Node.java:990)
	org.thymeleaf.dom.NestableNode.computeNextChild(NestableNode.java:695)
	org.thymeleaf.dom.NestableNode.doAdditionalProcess(NestableNode.java:668)
	org.thymeleaf.dom.Node.processNode(Node.java:990)
	org.thymeleaf.dom.Document.process(Document.java:93)
	org.thymeleaf.TemplateEngine.process(TemplateEngine.java:1155)
	org.thymeleaf.TemplateEngine.process(TemplateEngine.java:1060)
	org.thymeleaf.TemplateEngine.process(TemplateEngine.java:1011)
	org.thymeleaf.spring4.view.ThymeleafView.renderFragment(ThymeleafView.java:335)
	org.thymeleaf.spring4.view.ThymeleafView.render(ThymeleafView.java:190)
	org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1244)
	org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1027)
	org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:971)
	org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:893)
	org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)
	org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:861)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:622)
	org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
	org.springframework.orm.jpa.support.OpenEntityManagerInViewFilter.doFilterInternal(OpenEntityManagerInViewFilter.java:177)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:77)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:85)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)

root cause

org.springframework.expression.spel.SpelEvaluationException: EL1007E:(pos 0): Property or field 'title' cannot be found on null
	org.springframework.expression.spel.ast.PropertyOrFieldReference.readProperty(PropertyOrFieldReference.java:220)
	org.springframework.expression.spel.ast.PropertyOrFieldReference.getValueInternal(PropertyOrFieldReference.java:94)
	org.springframework.expression.spel.ast.PropertyOrFieldReference.access$000(PropertyOrFieldReference.java:46)
	org.springframework.expression.spel.ast.PropertyOrFieldReference$AccessorLValue.getValue(PropertyOrFieldReference.java:374)
	org.springframework.expression.spel.ast.CompoundExpression.getValueInternal(CompoundExpression.java:88)
	org.springframework.expression.spel.ast.SpelNodeImpl.getValue(SpelNodeImpl.java:120)
	org.springframework.expression.spel.standard.SpelExpression.getValue(SpelExpression.java:267)
	org.thymeleaf.spring4.expression.SpelVariableExpressionEvaluator.evaluate(SpelVariableExpressionEvaluator.java:139)
	org.thymeleaf.standard.expression.VariableExpression.executeVariable(VariableExpression.java:154)
	org.thymeleaf.standard.expression.SimpleExpression.executeSimple(SimpleExpression.java:59)
	org.thymeleaf.standard.expression.Expression.execute(Expression.java:103)
	org.thymeleaf.standard.expression.Expression.execute(Expression.java:133)
	org.thymeleaf.standard.expression.Expression.execute(Expression.java:120)
	org.thymeleaf.standard.processor.attr.AbstractStandardTextChildModifierAttrProcessor.getText(AbstractStandardTextChildModifierAttrProcessor.java:68)
	org.thymeleaf.processor.attr.AbstractTextChildModifierAttrProcessor.getModifiedChildren(AbstractTextChildModifierAttrProcessor.java:59)
	org.thymeleaf.processor.attr.AbstractChildrenModifierAttrProcessor.processAttribute(AbstractChildrenModifierAttrProcessor.java:59)
	org.thymeleaf.processor.attr.AbstractAttrProcessor.doProcess(AbstractAttrProcessor.java:87)
	org.thymeleaf.processor.AbstractProcessor.process(AbstractProcessor.java:212)
	org.thymeleaf.dom.Node.applyNextProcessor(Node.java:1017)
	org.thymeleaf.dom.Node.processNode(Node.java:972)
	org.thymeleaf.dom.NestableNode.computeNextChild(NestableNode.java:695)
	org.thymeleaf.dom.NestableNode.doAdditionalProcess(NestableNode.java:668)
	org.thymeleaf.dom.Node.processNode(Node.java:990)
	org.thymeleaf.dom.NestableNode.computeNextChild(NestableNode.java:695)
	org.thymeleaf.dom.NestableNode.doAdditionalProcess(NestableNode.java:668)
	org.thymeleaf.dom.Node.processNode(Node.java:990)
	org.thymeleaf.dom.NestableNode.computeNextChild(NestableNode.java:695)
	org.thymeleaf.dom.NestableNode.doAdditionalProcess(NestableNode.java:668)
	org.thymeleaf.dom.Node.processNode(Node.java:990)
	org.thymeleaf.dom.NestableNode.computeNextChild(NestableNode.java:695)
	org.thymeleaf.dom.NestableNode.doAdditionalProcess(NestableNode.java:668)
	org.thymeleaf.dom.Node.processNode(Node.java:990)
	org.thymeleaf.dom.Document.process(Document.java:93)
	org.thymeleaf.TemplateEngine.process(TemplateEngine.java:1155)
	org.thymeleaf.TemplateEngine.process(TemplateEngine.java:1060)
	org.thymeleaf.TemplateEngine.process(TemplateEngine.java:1011)
	org.thymeleaf.spring4.view.ThymeleafView.renderFragment(ThymeleafView.java:335)
	org.thymeleaf.spring4.view.ThymeleafView.render(ThymeleafView.java:190)
	org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1244)
	org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1027)
	org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:971)
	org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:893)
	org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)
	org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:861)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:622)
	org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
	org.springframework.orm.jpa.support.OpenEntityManagerInViewFilter.doFilterInternal(OpenEntityManagerInViewFilter.java:177)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:77)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:85)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)

note The full stack trace of the root cause is available in the Apache Tomcat/8.0.28 logs.


Apache Tomcat/8.0.28