Exception:

de.artundweise.landliebe.domain.ProductVariant.equals(ProductVariant.java:54)
de.artundweise.landliebe.web.controller.ProductDetailController.handle(ProductDetailController.java:72)
sun.reflect.GeneratedMethodAccessor315.invoke(Unknown Source)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
java.lang.reflect.Method.invoke(Method.java:597)
org.springframework.web.bind.annotation.support.HandlerMethodInvoker.doInvokeMethod(HandlerMethodInvoker.java:421)
org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:136)
org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:326)
org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:313)
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:875)
org.riotfamily.common.web.servlet.ReloadableDispatcherServlet.doDispatch(ReloadableDispatcherServlet.java:95)
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:807)
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:571)
org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:501)
javax.servlet.http.HttpServlet.service(HttpServlet.java:627)
javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
de.artundweise.landliebe.web.filter.XmlParameterFilter.doFilter(XmlParameterFilter.java:32)
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
org.riotfamily.common.web.filter.PluginChain.doFilter(PluginChain.java:62)
org.riotfamily.common.web.filter.PluginChain.doFilter(PluginChain.java:69)
org.riotfamily.statistics.web.RequestCountFilterPlugin.doFilter(RequestCountFilterPlugin.java:60)
org.riotfamily.common.web.filter.PluginChain.doFilter(PluginChain.java:59)
org.riotfamily.common.web.filter.PluginChain.doFilter(PluginChain.java:69)
org.riotfamily.common.web.filter.ExpiresHeaderFilterPlugin.doFilter(ExpiresHeaderFilterPlugin.java:94)
org.riotfamily.common.web.filter.PluginChain.doFilter(PluginChain.java:59)
org.riotfamily.common.web.filter.PluginChain.doFilter(PluginChain.java:69)
org.riotfamily.riot.security.session.AccessControlFilterPlugin.doFilter(AccessControlFilterPlugin.java:57)
org.riotfamily.common.web.filter.PluginChain.doFilter(PluginChain.java:59)
org.riotfamily.common.web.filter.PluginChain.doFilter(PluginChain.java:69)
org.riotfamily.riot.hibernate.support.OpenSessionInViewFilterPlugin.doFilter(OpenSessionInViewFilterPlugin.java:124)
org.riotfamily.common.web.filter.PluginChain.doFilter(PluginChain.java:59)
org.riotfamily.common.web.filter.PluginFilter.doFilterInternal(PluginFilter.java:123)
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
org.riotfamily.common.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:95)
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:172)
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:174)
org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:200)
org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:291)
org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:775)
org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:704)
org.apache.jk.common.ChannelSocket$SocketConnection.runIt(ChannelSocket.java:897)
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689)
java.lang.Thread.run(Thread.java:662)