type Exception report
message
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 javax.el.ELException: Expression cannot be null org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:656) org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:549) javax.servlet.http.HttpServlet.service(HttpServlet.java:617) javax.servlet.http.HttpServlet.service(HttpServlet.java:717) filter.HttpHeadFilter.doFilter(HttpHeadFilter.java:36) com.cj.trim.trimFilter.doFilter(Unknown Source) org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88) org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
root cause
javax.el.ELException: Expression cannot be null org.apache.el.lang.ExpressionBuilder.createNodeInternal(ExpressionBuilder.java:87) org.apache.el.lang.ExpressionBuilder.build(ExpressionBuilder.java:146) org.apache.el.lang.ExpressionBuilder.createValueExpression(ExpressionBuilder.java:190) org.apache.el.ExpressionFactoryImpl.createValueExpression(ExpressionFactoryImpl.java:68) org.apache.tiles.evaluator.el.ELAttributeEvaluator.evaluate(ELAttributeEvaluator.java:156) org.apache.tiles.evaluator.AbstractAttributeEvaluator.evaluate(AbstractAttributeEvaluator.java:44) org.apache.tiles.impl.BasicTilesContainer.evaluate(BasicTilesContainer.java:344) org.apache.tiles.jsp.taglib.AttributeTagSupport.doStartTag(AttributeTagSupport.java:156) org.apache.jsp.WEB_002dINF.jsp._005ftemplates.menus.menu_005fligen_jsp._jspService(menu_005fligen_jsp.java:99) org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70) javax.servlet.http.HttpServlet.service(HttpServlet.java:717) org.apache.jasper.runtime.JspRuntimeLibrary.include(JspRuntimeLibrary.java:968) org.apache.jasper.runtime.PageContextImpl.doInclude(PageContextImpl.java:640) org.apache.jasper.runtime.PageContextImpl.include(PageContextImpl.java:634) org.apache.tiles.jsp.context.JspTilesRequestContext.include(JspTilesRequestContext.java:103) org.apache.tiles.jsp.context.JspTilesRequestContext.dispatch(JspTilesRequestContext.java:96) org.apache.tiles.renderer.impl.TemplateAttributeRenderer.write(TemplateAttributeRenderer.java:44) org.apache.tiles.renderer.impl.AbstractBaseAttributeRenderer.render(AbstractBaseAttributeRenderer.java:103) org.apache.tiles.impl.BasicTilesContainer.render(BasicTilesContainer.java:659) org.apache.tiles.impl.BasicTilesContainer.render(BasicTilesContainer.java:678) org.apache.tiles.impl.BasicTilesContainer.renderContext(BasicTilesContainer.java:176) org.apache.tiles.jsp.taglib.InsertTemplateTag.renderContext(InsertTemplateTag.java:91) org.apache.tiles.jsp.taglib.InsertTemplateTag.render(InsertTemplateTag.java:81) org.apache.tiles.jsp.taglib.RenderTag.doEndTag(RenderTag.java:220) org.apache.jsp.WEB_002dINF.jsp._005ftemplates.template_jsp._jspx_meth_tiles_005finsertTemplate_005f0(template_jsp.java:1407) org.apache.jsp.WEB_002dINF.jsp._005ftemplates.template_jsp._jspService(template_jsp.java:465) org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70) javax.servlet.http.HttpServlet.service(HttpServlet.java:717) org.apache.tiles.servlet.context.ServletTilesRequestContext.forward(ServletTilesRequestContext.java:241) org.apache.tiles.servlet.context.ServletTilesRequestContext.dispatch(ServletTilesRequestContext.java:222) org.apache.tiles.renderer.impl.TemplateAttributeRenderer.write(TemplateAttributeRenderer.java:44) org.apache.tiles.renderer.impl.AbstractBaseAttributeRenderer.render(AbstractBaseAttributeRenderer.java:103) org.apache.tiles.impl.BasicTilesContainer.render(BasicTilesContainer.java:659) org.apache.tiles.impl.BasicTilesContainer.render(BasicTilesContainer.java:678) org.apache.tiles.impl.BasicTilesContainer.render(BasicTilesContainer.java:633) org.apache.tiles.impl.BasicTilesContainer.render(BasicTilesContainer.java:322) org.springframework.web.servlet.view.tiles2.TilesView.renderMergedOutputModel(TilesView.java:124) org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:250) org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1047) org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:817) org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:719) org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:644) org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:549) javax.servlet.http.HttpServlet.service(HttpServlet.java:617) javax.servlet.http.HttpServlet.service(HttpServlet.java:717) filter.HttpHeadFilter.doFilter(HttpHeadFilter.java:36) com.cj.trim.trimFilter.doFilter(Unknown Source) org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88) org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
note The full stack trace of the root cause is available in the Apache Tomcat/6.0.18 logs.