HTTP Status 500 - Request processing failed; nested exception is org.thymeleaf.exceptions.TemplateProcessingException: Exception evaluating SpringEL expression: "#lists.size(songs) > 9" (songs:21)

type Exception report

message Request processing failed; nested exception is org.thymeleaf.exceptions.TemplateProcessingException: Exception evaluating SpringEL expression: "#lists.size(songs) > 9" (songs:21)

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: "#lists.size(songs) > 9" (songs:21)
	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.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
	org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:317)
	org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:114)
	org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
	org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:137)
	org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
	org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:111)
	org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
	org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:170)
	org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
	org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:63)
	org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
	org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:116)
	org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
	org.springframework.security.web.csrf.CsrfFilter.doFilterInternal(CsrfFilter.java:100)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
	org.springframework.security.web.header.HeaderWriterFilter.doFilterInternal(HeaderWriterFilter.java:64)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
	org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:105)
	org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
	org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFilter.java:56)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
	org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:214)
	org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:177)
	org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:346)
	org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:262)
	org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:105)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:81)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)

root cause

org.thymeleaf.exceptions.TemplateProcessingException: Exception evaluating SpringEL expression: "#lists.size(songs) > 9" (songs:21)
	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.AbstractStandardConditionalVisibilityAttrProcessor.isVisible(AbstractStandardConditionalVisibilityAttrProcessor.java:66)
	org.thymeleaf.processor.attr.AbstractConditionalVisibilityAttrProcessor.processAttribute(AbstractConditionalVisibilityAttrProcessor.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.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:1282)
	org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1037)
	org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:980)
	org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:897)
	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.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
	org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:317)
	org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:114)
	org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
	org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:137)
	org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
	org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:111)
	org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
	org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:170)
	org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
	org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:63)
	org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
	org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:116)
	org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
	org.springframework.security.web.csrf.CsrfFilter.doFilterInternal(CsrfFilter.java:100)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
	org.springframework.security.web.header.HeaderWriterFilter.doFilterInternal(HeaderWriterFilter.java:64)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
	org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:105)
	org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
	org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFilter.java:56)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
	org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:214)
	org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:177)
	org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:346)
	org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:262)
	org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:105)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:81)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)

root cause

java.lang.IllegalArgumentException: Cannot get list size of null
	org.thymeleaf.util.Validate.notNull(Validate.java:37)
	org.thymeleaf.util.ListUtils.size(ListUtils.java:68)
	org.thymeleaf.expression.Lists.size(Lists.java:52)
	sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	java.lang.reflect.Method.invoke(Method.java:498)
	org.springframework.expression.spel.support.ReflectiveMethodExecutor.execute(ReflectiveMethodExecutor.java:113)
	org.springframework.expression.spel.ast.MethodReference.getValueInternal(MethodReference.java:129)
	org.springframework.expression.spel.ast.MethodReference.access$000(MethodReference.java:49)
	org.springframework.expression.spel.ast.MethodReference$MethodValueRef.getValue(MethodReference.java:347)
	org.springframework.expression.spel.ast.CompoundExpression.getValueInternal(CompoundExpression.java:88)
	org.springframework.expression.spel.ast.OpGT.getValueInternal(OpGT.java:47)
	org.springframework.expression.spel.ast.OpGT.getValueInternal(OpGT.java:37)
	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.AbstractStandardConditionalVisibilityAttrProcessor.isVisible(AbstractStandardConditionalVisibilityAttrProcessor.java:66)
	org.thymeleaf.processor.attr.AbstractConditionalVisibilityAttrProcessor.processAttribute(AbstractConditionalVisibilityAttrProcessor.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.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:1282)
	org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1037)
	org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:980)
	org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:897)
	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.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
	org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:317)
	org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:114)
	org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
	org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:137)
	org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
	org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:111)
	org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
	org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:170)
	org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
	org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:63)
	org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
	org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:116)
	org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
	org.springframework.security.web.csrf.CsrfFilter.doFilterInternal(CsrfFilter.java:100)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
	org.springframework.security.web.header.HeaderWriterFilter.doFilterInternal(HeaderWriterFilter.java:64)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
	org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:105)
	org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
	org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFilter.java:56)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
	org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:214)
	org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:177)
	org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:346)
	org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:262)
	org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:105)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:81)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)

note The full stack trace of the root cause is available in the Apache Tomcat/8.5.11 logs.


Apache Tomcat/8.5.11