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  1. ,
    Expert tip

    If you're not using an embedded servlet container, try do disable the white label in your application.properties, with "server.error.whitelabel.enabled = false" otherwise check this answer on stackoverflow: https://goo.gl/rG0vKE

  2. ,
    Expert tip

    Flow files only know how to work with Spring Beans, annotate ManagedBean with @Component('serviceProviderSubscriptionBB') or declare the managed bean directly on flow with <var name="serviceProviderSubscriptionBB" class="the full name of your class"/>

Solutions on the web

via GitHub by php-coder
, 1 year ago
Request processing failed; nested exception is org.thymeleaf.exceptions.TemplateProcessingException: Exception evaluating SpringEL expression: "#authentication.principal.user.collection.id" (site/events:66)
via Stack Overflow by Timofey
, 1 year ago
Request processing failed; nested exception is java.lang.NullPointerException
via Stack Overflow by Alexey
, 9 months ago
Request processing failed; nested exception is java.lang.NullPointerException
via Spring JIRA by Petar Tahchiev, 1 year ago
Request processing failed; nested exception is java.lang.IllegalStateException: Ambiguous handler methods mapped for HTTP path 'http://localhost:8111/storefront/': {public java.lang.String
via Spring JIRA by Petar Tahchiev, 1 year ago
Request processing failed; nested exception is java.lang.IllegalStateException: Ambiguous handler methods mapped for HTTP path 'http://localhost:8111/storefront/': {public java.lang.String
via Stack Overflow by herman shafiq
, 2 weeks ago
Request processing failed; nested exception is java.lang.UnsupportedOperationException: Possible CSRF attack
org.springframework.expression.spel.SpelEvaluationException: EL1008E:(pos 26): Property or field 'user' cannot be found on object of type 'ru.mystamps.web.support.spring.security.CustomUserDetails' - maybe not public?	at org.springframework.expression.spel.ast.PropertyOrFieldReference.readProperty(PropertyOrFieldReference.java:224)	at org.springframework.expression.spel.ast.PropertyOrFieldReference.getValueInternal(PropertyOrFieldReference.java:94)	at org.springframework.expression.spel.ast.PropertyOrFieldReference.getValueInternal(PropertyOrFieldReference.java:81)	at org.springframework.expression.spel.ast.CompoundExpression.getValueRef(CompoundExpression.java:57)	at org.springframework.expression.spel.ast.CompoundExpression.getValueInternal(CompoundExpression.java:87)	at org.springframework.expression.spel.ast.SpelNodeImpl.getValue(SpelNodeImpl.java:120)	at org.springframework.expression.spel.standard.SpelExpression.getValue(SpelExpression.java:267)	at org.thymeleaf.spring4.expression.SpelVariableExpressionEvaluator.evaluate(SpelVariableExpressionEvaluator.java:139)	at org.thymeleaf.standard.expression.VariableExpression.executeVariable(VariableExpression.java:154)	at org.thymeleaf.standard.expression.SimpleExpression.executeSimple(SimpleExpression.java:59)	at org.thymeleaf.standard.expression.Expression.execute(Expression.java:103)	at org.thymeleaf.standard.expression.Expression.execute(Expression.java:133)	at org.thymeleaf.standard.expression.LinkExpression.resolveParameters(LinkExpression.java:442)	at org.thymeleaf.standard.expression.LinkExpression.executeLink(LinkExpression.java:276)	at org.thymeleaf.standard.expression.SimpleExpression.executeSimple(SimpleExpression.java:77)	at org.thymeleaf.standard.expression.Expression.execute(Expression.java:103)	at org.thymeleaf.standard.expression.Expression.execute(Expression.java:133)	at org.thymeleaf.standard.expression.Expression.execute(Expression.java:120)	at org.thymeleaf.standard.processor.attr.AbstractStandardSingleAttributeModifierAttrProcessor.getTargetAttributeValue(AbstractStandardSingleAttributeModifierAttrProcessor.java:67)	at org.thymeleaf.spring4.processor.attr.SpringHrefAttrProcessor.getTargetAttributeValue(SpringHrefAttrProcessor.java:68)	at org.thymeleaf.processor.attr.AbstractSingleAttributeModifierAttrProcessor.getModifiedAttributeValues(AbstractSingleAttributeModifierAttrProcessor.java:59)	at org.thymeleaf.processor.attr.AbstractAttributeModifierAttrProcessor.processAttribute(AbstractAttributeModifierAttrProcessor.java:62)	at org.thymeleaf.processor.attr.AbstractAttrProcessor.doProcess(AbstractAttrProcessor.java:87)	at org.thymeleaf.processor.AbstractProcessor.process(AbstractProcessor.java:212)	at org.thymeleaf.dom.Node.applyNextProcessor(Node.java:1017)	at org.thymeleaf.dom.Node.processNode(Node.java:972)	at org.thymeleaf.dom.NestableNode.computeNextChild(NestableNode.java:695)	at org.thymeleaf.dom.NestableNode.doAdditionalProcess(NestableNode.java:668)	at org.thymeleaf.dom.Node.processNode(Node.java:990)	at org.thymeleaf.dom.NestableNode.computeNextChild(NestableNode.java:695)	at org.thymeleaf.dom.NestableNode.doAdditionalProcess(NestableNode.java:668)	at org.thymeleaf.dom.Node.processNode(Node.java:990)	at org.thymeleaf.dom.NestableNode.computeNextChild(NestableNode.java:695)	at org.thymeleaf.dom.NestableNode.doAdditionalProcess(NestableNode.java:668)	at org.thymeleaf.dom.Node.processNode(Node.java:990)	at org.thymeleaf.dom.NestableNode.computeNextChild(NestableNode.java:695)	at org.thymeleaf.dom.NestableNode.doAdditionalProcess(NestableNode.java:668)	at org.thymeleaf.dom.Node.processNode(Node.java:990)	at org.thymeleaf.dom.NestableNode.computeNextChild(NestableNode.java:695)	at org.thymeleaf.dom.NestableNode.doAdditionalProcess(NestableNode.java:668)	at org.thymeleaf.dom.Node.processNode(Node.java:990)	at org.thymeleaf.dom.NestableNode.computeNextChild(NestableNode.java:695)	at org.thymeleaf.dom.NestableNode.doAdditionalProcess(NestableNode.java:668)	at org.thymeleaf.dom.Node.processNode(Node.java:990)	at org.thymeleaf.dom.NestableNode.computeNextChild(NestableNode.java:695)	at org.thymeleaf.dom.NestableNode.doAdditionalProcess(NestableNode.java:668)	at org.thymeleaf.dom.Node.processNode(Node.java:990)	at org.thymeleaf.dom.NestableNode.computeNextChild(NestableNode.java:695)	at org.thymeleaf.dom.NestableNode.doAdditionalProcess(NestableNode.java:668)	at org.thymeleaf.dom.Node.processNode(Node.java:990)	at org.thymeleaf.dom.Document.process(Document.java:93)	at org.thymeleaf.TemplateEngine.process(TemplateEngine.java:1155)	at org.thymeleaf.TemplateEngine.process(TemplateEngine.java:1060)	at org.thymeleaf.TemplateEngine.process(TemplateEngine.java:1011)	at org.thymeleaf.spring4.view.ThymeleafView.renderFragment(ThymeleafView.java:335)	at org.thymeleaf.spring4.view.ThymeleafView.render(ThymeleafView.java:190)	at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1246)	at org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1029)	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:973)	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:895)	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:967)	at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:858)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:687)	at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:843)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)	at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:812)	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1669)	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:316)	at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:115)	at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:90)	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)	at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:114)	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)	at org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:69)	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)	at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:111)	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)	at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:169)	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)	at org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:48)	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)	at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:205)	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)	at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:120)	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:101)	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)	at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:68)	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:101)	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)	at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:213)	at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:184)	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652)	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:316)	at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:126)	at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:90)	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)	at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:114)	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)	at org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:122)	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)	at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:111)	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)	at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:169)	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)	at org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:48)	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)	at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:205)	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)	at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:120)	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)	at org.springframework.security.web.csrf.CsrfFilter.doFilterInternal(CsrfFilter.java:96)	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)	at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:91)	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)	at org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFilter.java:53)	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)	at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:213)	at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:176)	at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:346)	at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:262)	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652)	at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99)	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652)	at org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:87)	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652)	at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:77)	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652)	at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:121)	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652)	at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:585)	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)	at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:577)	at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:223)	at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1127)	at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:515)	at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185)	at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1061)	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)	at org.eclipse.jetty.servlets.gzip.GzipHandler.handle(GzipHandler.java:479)	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97)	at org.eclipse.jetty.server.Server.handle(Server.java:499)	at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:311)	at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:257)	at org.eclipse.jetty.io.AbstractConnection$2.run(AbstractConnection.java:544)	at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:635)	at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:555)	at java.lang.Thread.run(Thread.java:745)